Article
Chemistry, Analytical
Muhammed Bekmezci, Hudanur Ozturk, Merve Akin, Ramazan Bayat, Fatih Sen, Rozhin Darabi, Hassan Karimi-Maleh
Summary: In this study, Silver-Platinum (Pt-Ag) bimetallic nanoparticles were synthesized using a biogenic reduction method with plant extracts. The reduction method provided a novel approach to obtaining nanostructures with fewer chemicals. The Pt-Ag bimetallic nanoparticles demonstrated an ideal size of 2.31 nm as observed through Transmission Electron Microscopy. Characterization of the nanoparticles was conducted using Fourier Transform Infrared Spectroscopy, X-ray Diffractometry, and Ultraviolet-Visible spectroscopy. Electrochemical measurements using Cyclic Voltammetry and Differential Pulse Voltammetry indicated a limit of detection of 0.03 μM and a limit of quantification of 0.11 μM. The antibacterial properties of the Pt-Ag NPs were also evaluated, showing strong antibacterial effects against Escherichia coli and Staphylococcus aureus bacteria.
Article
Chemistry, Physical
Yejin Song, Daeho Kim, Seunghwa Hong, Taek-Seung Kim, Ki-Jeong Kim, Jeong Young Park
Summary: The formation and impact of the Pt-CoO interface on Pt-Co bimetallic NPs were investigated, revealing that the interfacial structures play a key role in enhancing catalytic activity.
Article
Chemistry, Analytical
Yanxun Guan, Fen Xu, Lixian Sun, Yumei Luo, Riguang Cheng, Yongjin Zou, Lumin Liao, Zhong Cao
Summary: In this study, a hydrogen peroxide electrochemical sensor has been developed by electropolymerizing polypyrrole (PPy) on a glass carbon electrode (GCE) and modifying Ag and Cu nanoparticles on the surface of PPy via electrodeposition. The sensor shows good response to H2O2 with two linear intervals and exhibits high reproducibility, repeatability, anti-interference, and stability. The proposed sensor reduces the cost by using non-precious metals without compromising the sensing performance of H2O2.
Article
Engineering, Electrical & Electronic
Yue Zhao, Rong Liu
Summary: Platinum-copper (Pt-Cu) alloy colloid was successfully prepared and loaded on nitrogen-doped carbon nanotubes using the microwave-assisted polyol reduction method. The catalyst exhibited excellent oxygen reduction reaction (ORR) catalytic activities, especially surpassing the commercial Pt/C catalyst in terms of mass activities. This study provides a simple and effective way to prepare catalyst for fuel cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Sanghwa Lee, Megalamane S. Bootharaju, Guocheng Deng, Sami Malola, Hannu Hakkinen, Nanfeng Zheng, Taeghwan Hyeon
Summary: Heteroatom-doped metal nanoclusters are synthesized by a metal-exchange strategy, leading to the discovery that Pt doping can significantly enhance the catalytic activity of Cu nanoclusters by around 300-fold. This synthetic approach has the potential to produce Ni-, Pd-, and Au-doped Cu nanoclusters, opening new avenues for studying their molecular structures and catalytic properties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Feng Hong, Guanjian Cheng, Weihao Hu, Shengyang Wang, Qike Jiang, Junhong Fu, Botao Qiao, Jiahui Huang
Summary: Gold-based catalysts have shown promise for CO preferential oxidation (CO-PROX) reaction in H-2-rich streams due to their high intrinsic activity for CO elimination even at room temperature. However, the competition of H-2 oxidation and the low stability of gold nanoparticles have limited the CO conversion at elevated temperatures. In this study, a Au-Cu bimetallic catalyst prepared by galvanic replacement method was found to exhibit a wide temperature window for CO total conversion (30-100 degrees C) and excellent catalyst stability without deactivation during a 200-hour test. Detailed characterizations and density functional theory (DFT) calculations revealed that the synergistic effect of Au-Cu and the electron transfer from Au to Cu enhanced the chemisorption of CO and weakened the dissociation of H-2, inhibiting the competition of H-2 oxidation and widening the temperature window for CO total conversion.
Article
Chemistry, Multidisciplinary
Heon Chul Kim, Jong Wook Hong
Summary: Highly porous Au-Pt urchin-like bimetallic nanocrystals were prepared by a one-pot wet-chemical synthesis method, with the porosity controlled by the amount of hydrazine used as reductant. Due to their unique morphology leading to high porosity and surface active sites, the prepared nanocrystals were superior catalysts for electrochemical methanol oxidation. This approach opens up possibilities for designing bimetallic porous materials with unprecedented functions.
Article
Energy & Fuels
Youngwon Ju, Taehoon Cho, Kichul Lee, Jiwoong Kim, Chang Won Yoon, Joohoon Kim
Summary: We report the size-dependent activity of Pt nanoparticles in the range of 1 to 4 nm for the hydrolytic dehydrogenation of ammonia borane. Pt nanoparticles with different sizes were encapsulated inside dendrimers to study their intrinsic size effect on catalytic activity. The results showed that Pt nanoparticles exhibited significant catalytic activity, and the size-dependent activity was attributed to the geometric nature of the nanoparticles.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Natalia S. Veizaga, Gustavo Mendow, Andres Felipe Quintero-Jaime, Angel Berenguer-Murcia, Sergio de Miguel, Emilia Morallon, Diego Cazorla-Amoros
Summary: The study focuses on the synthesis of mono- and bimetallic Pt-based electrocatalysts for ethanol electrooxidation in acidic media. Incorporation of Re promotes bond breaking of intermediates, while addition of Ir reduces electroactive surface area and decreases electrocatalytic performance.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Environmental
Zhen He, Qiaohui Duan, Lingwen Liao, Chengming Wang
Summary: Jagged Au-Pt bimetallic nanowires with abundant twin boundaries have been synthesized, and the lattice strain and electronic structures of Pt in the twin-rich nanowires have been tuned, resulting in the modulation of alcohol oxidation reaction (AOR) activities. The AuPt3 nanowires exhibit the highest mass activity for ethanol and methanol oxidation reactions, surpassing other nanowires and commercial Pt/C catalysts. The structure-activity correlation for AOR follows a volcano-shaped curve with increasing Pt ratios. This work provides a simple yet effective method to synthesize twin-rich bimetallic nanostructures with controlled lattice strain and illustrates their structure-dependent properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yutao Hu, Xiaolong Liu, Yang Zou, Haijiao Xie, Tingyu Zhu
Summary: Pt nanoparticle catalysts supported on a series of TiO2-SiO2 composites were prepared and their CO oxidation activities were evaluated under dry and humid conditions. The catalyst Pt/1Ti-3Si showed the best performance under both conditions and has potential for future industrial applications. The promotion effect of H2O was studied and found to be correlated with H2O concentration and Ti-Si ratio. Defects on the supports inhibited phase transformation and lattice growth for TiO2. The formation of metallic Pt0 particles was beneficial for CO oxidation. The H2O promotion effect could be controlled by regulating the nature of the support. The proposed mechanism of H2O promotion confirmed the carboxyl intermediate pathway.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Jianhua Cai, Yuxi Wen, Wei Sheng, Xuejin Huang, Ye Zheng, Chunlan Song, Jiakun Li
Summary: The direct synthesis of 1,3-diols has been a challenging task, but these compounds are important in bioactive compounds. In this study, a simple and efficient strategy for synthesizing 1,3-diols using controlled electrochemical C-C bond cleavage of arylcyclopropanes with H2O as the hydroxyl source is reported. This method has high atom economy, broad substrate scope, and excellent functional group tolerance, making it applicable for the synthesis of complex natural products and drug derivatives.
Article
Chemistry, Physical
Afsar Ali, Divyansh Prakash, Piyali Majumder, Soumya Ghosh, Arnab Dutta
Summary: The development of a stable molecular copper catalyst with a labile diimine-dioxime ligand framework enables rapid and complete electrocatalysis for both oxygen reduction and water oxidation. Computational investigations highlight the importance of the interactive ligand scaffold in accommodating variable oxidation states of copper and influencing the dynamics of O-O bond cleavage/formation during catalysis. This study establishes a template for designing molecular catalysts to mediate energy-relevant multi-electron/multi-proton reactions in both oxidizing and reducing environments.
Article
Chemistry, Inorganic & Nuclear
Firasat Hussain, Imran Khan, Vivek Das
Summary: The catalytic activity of tetrameric lanthanide-substituted phospho, germano, and silicotungstate compounds was investigated for the oxidation of alcohol derivatives. The study found that the lanthanide-substituted phosphotungstates exhibited better catalytic activity compared to the silico and germanotungstate analogues. The reaction was carried out in an environmentally friendly solvent (water) in the presence of a green oxidant (H2O2). The recovered catalysts were characterized using FT-IR spectroscopy and powder X-ray diffraction. The catalysts showed stability and could be reused with only a slight decrease in catalytic activity after five consecutive cycles.
INORGANICA CHIMICA ACTA
(2022)
Article
Biochemistry & Molecular Biology
Henrik E. Hansen, Daniel O. Fakhri, Frode Seland, Svein Sunde, Odne S. Burheim, Bruno G. Pollet
Summary: In this study, Cu@Pt bimetallic nanocatalysts were successfully synthesized using the sonochemical method, exhibiting significantly higher mass activity in the hydrogen evolution reaction compared to traditional Pt catalysts.
Article
Polymer Science
Chunhui Chen, Kai Wei, Jiayu Gu, Xiaoyang Huang, Xianyao Dai, Qingbing Liu
Summary: This study investigates the feasibility of using a combination of ecofriendly biopolymer and fiber to reinforce soft soil as an alternative to traditional cement. The results show that the combined effect of biopolymer and fibers has a similar compressive strength as fiber-reinforced soil. The biopolymer plays a dominant role in increasing the strength and brittleness of the soil, while the fiber is crucial for reducing brittleness and increasing ductility.
Article
Chemistry, Physical
Qiong Wang, Jian Yang, Xiaoyang Huang, Zhenghao Zhai, Jingxiao Tang, Jinhai You, Chenguang Shi, Weize Li, Peng Dai, Weichen Zheng, Ling Huang, Shigang Sun
Summary: This study presents a novel design for the lithium metal anode, where polymer materials synthesized with different molecular configurations are grafted onto copper foils to form a stable and high-performance solid electrolyte interphase (SEI) layer. The SEI layer between the lithium metal anode and the copper foil improves the coulombic efficiency and cycling stability, providing a new approach for future battery design.
ADVANCED ENERGY MATERIALS
(2022)
Article
Engineering, Chemical
Fanhui Meng, Xiaotong Liang, Lina Wang, Guinan Yang, Xiaoyang Huang, Zhong Li
Summary: Zeolites in bifunctional catalysts composed of a metal oxide and a zeolite (OX-ZEO) play a crucial role in conversion of generated intermediates during the reaction. The effects of templates and SiO2/Al2O3 molar ratios on the zeolite structure and surface properties were investigated, and the catalytic performance of SAPO-34 combined with GaZrOx oxide for the conversion of syngas into light olefins was explored. SAPO-34 with small particle sizes benefits to enhance the CO conversion and C-2-4(=) selectivity. SAR0.4-TD with a SiO2/Al2O3 ratio of 0.4 exhibits the highest space-time yield of light olefins.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Yu Liang, Mark Douthwaite, Xiaoyang Huang, Binbin Zhao, Qiong Tang, Lei Liu, Jinxiang Dong
Summary: In this study, we developed an efficient method for depositing Pt particles on FeOx/SBA-15, using Pt-0-DVTMS precursor, and demonstrated its high performance and selectivity in the chemoselective hydrogenation of alpha,beta-unsaturated aldehydes. The research also showed the significant influence of metal support interactions on the selectivity and activity of the catalyst.
Article
Chemistry, Multidisciplinary
Hua Zhang, Yintang Zhou, Ming Xu, Anran Chen, Zitao Ni, Ouardia Akdim, Thomas Wagberg, Xiaoyang Huang, Guangzhi Hu
Summary: This study presents a hierarchical transition metal hydroxide/sulfide (NiFe(OH)x-Ni3S2/NF) electrode with dual heterointerface coexistence, achieved through a cation exchange-induced surface reconfiguration strategy. The electrode exhibits superior electrocatalytic activities, with low over-potentials of 55 mV for hydrogen evolution and 182 mV for oxygen evolution at 10 mA cm-2. The assembled two-electrode system achieves industrially relevant current densities with excellent durability, comparable to commercial electrolysis.
Article
Multidisciplinary Sciences
Jia-Yi Fang, Qi-Zheng Zheng, Yao-Yin Lou, Kuang-Min Zhao, Sheng-Nan Hu, Guang Li, Ouardia Akdim, Xiao-Yang Huang, Shi-Gang Sun
Summary: The development of CuCo bimetallic catalyst for efficient reduction of nitrate to ammonia is presented. The catalyst demonstrates high Faradaic efficiency and NH3 production rate. Mechanistic study reveals strong synergy between Cu and Co, promoting the hydrogenation of nitrate to ammonia.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Fei Rao, Yurong An, Xiaoyang Huang, Lujun Zhu, Siwen Gong, Xianjin Shi, Jiangbo Lu, Jianzhi Gao, Yu Huang, Qizhao Wang, Peng Liu, Gangqiang Zhu
Summary: Photogenerated charge transfer can be controlled by crystal face controlling and heterostructure engineering, and the separation pathway of charge carriers in (111)/(100)CeO2-x nanomaterials as the X-Scheme junction is elucidated in this study. The X-Scheme junction is driven by the asymmetry of localized electronic band structures of ceria, which leads to the accumulation of photogenerated electrons on the (111) plane and photogenerated holes on the (100) plane. Surface oxygen vacancies facilitate the transfer of photogenerated electrons and holes to specific planes, resulting in enhanced photo-oxidative nitric oxide removal efficiency. Metal nanoparticles are also integrated into the system, which restricts the production of nitrogen dioxide as a byproduct. This work provides insights into single-crystal photocatalysts based on facet junctions.
Article
Chemistry, Physical
Liang Zhao, Ouardia Akdim, Xiaoyang Huang, Kai Wang, Mark Douthwaite, Samuel Pattisson, Richard J. Lewis, Runjia Lin, Bingqing Yao, David J. Morgan, Greg Shaw, Qian He, Donald Bethell, Steven McIntosh, Christopher J. Kiely, Graham J. Hutchings
Summary: The aerobic oxidation of alcohols and aldehydes over supported heterogeneous catalysts involves dehydrogenation and oxygen reduction processes. The cooperative redox enhancement (CORE) effect, where independent active sites catalyze the processes and electron transport occurs between the catalysts, can greatly influence catalyst design. The Au/Pd ratio used in physical mixtures of monometallic catalysts and phase-separated bimetallic catalysts significantly affects the degree to which CORE effects promote alcohol oxidation. Furthermore, the roles of Au and Pd in this coupled system are found to be interchangeable, potentially due to the relative rates of the coupled reactions and the influence of physical properties. This deeper understanding of CORE factors is an important development in bimetallic catalysis.
Article
Chemistry, Physical
Qingyi Zeng, Yuhan Cao, Beibei Gao, Xiaoyang Huang, Qingyan Zhang, Yumei Wang, Tao Cai, Yuehua Zhang, Junwen Lv, Zhu Xiong, Wenjing Xue
Summary: In this study, a Co doped anatase titanium dioxide (Co@TiO2) was prepared by a simple wet chemical method and successfully activated peroxymonosulfate (PMS) for efficient degradation of refractory organic pollutants. The doped Co replaced partial Ti without causing significant structural change. The Co@TiO2/PMS system showed high efficiency in removing chlortetracycline (CTC) and Rhodamine B (RhB) within short reaction times.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Wei Yan, Guang Li, Shuangshuang Cui, Gyeong-Su Park, Rena Oh, Weixin Chen, Xiaoyang Cheng, Jun-Ming Zhang, Weize Li, Li-Fei Ji, Ouardia Akdim, Xiaoyang Huang, Haixin Lin, Jian Yang, Yan-Xia Jiang, Shi-Gang Sun
Summary: This study reports a Pt3Ga/C electrocatalyst that efficiently produces CO2 through direct and sustainable oxidation of C2 intermediate species (acetaldehyde). The atomic interval structure between Pt and Ga prevents the formation of poisonous species and increases the available sites for interaction with C2 intermediates. The high hydrophilicity of Ga facilitates the dissociation of H2O, promoting the deep oxidation of C2 intermediates. This research represents a rare EOR process that produces CO2 without observing kinetic limitations under medium potential conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Yuyang Kang, Zhenao Gu, Baiwen Ma, Wei Zhang, Jingqiu Sun, Xiaoyang Huang, Chengzhi Hu, Wonyong Choi, Jiuhui Qu
Summary: Electrocatalytic oxidation can be enhanced by reducing pore size, leading to improved reaction kinetics and electron transfer pathways. This study provides insights for the design of cost-effective electrochemical platforms.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Rena Oh, Xiaoyang Huang, Xiuyuan Lu, Chunhui Chen, Yao-Yin Lou, Lili Geng, Xiang Zhang, Delin Du, Jianjun Li, Wei Yan, Gyeong-Su Park, Ouardia Akdim, Seong Keun Kim, Shi-Gang Sun
Summary: A sugar-derived green biopolymer called xanthan gum can replace the toxic binder nafion for electrocatalytic alcohol oxidations. It has hydrophilicity and homogeneous adhesion properties that enhance the catalyst-electrode contact and therefore the catalytic activity. Xanthan gum is a cheaper and more environmentally friendly alternative to nafion, and it improves the electrocatalytic oxidation of alcohols and sugars in alkaline electrolytes. Its even distribution and good mechanical properties on the electrode's surface facilitate electron transfer and the interaction between alcohols/sugars and the catalyst.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Huici Shan, Rena Oh, Jianqiang Fan, Xiang Zhang, Nuowei Zhang, Xiaoyang Huang, Gyeong-Su Park, Quanxing Zheng, Hongliang Lu, Binghui Chen
Summary: Catalytic wet air oxidation (CWAO) process was used to degrade phenol in wastewater, in which Pt-M (M=Pb, Cu) alloy catalysts with Pt0 and M2+ were developed. Pt-Pb/XC-72R exhibited high activity and stability in CWAO, while Pt-Pb/EC-300 rapidly deactivated. Pt-Pb was then replaced by Pt-Cu nanoparticles to maintain catalytic activity and stability, and increasing Cu2+ further enhanced the performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Liang Zhao, Ouardia Akdim, Xiaoyang Huang, Kai Wang, Mark Douthwaite, Samuel Pattisson, Richard J. Lewis, Runjia Lin, Bingqing Yao, David J. Morgan, Greg Shaw, Qian He, Donald Bethell, Steven McIntosh, Christopher J. Kiely, Graham J. Hutchings
Summary: The aerobic oxidation of alcohols and aldehydes over supported heterogeneous catalysts involves two interconnected processes: dehydrogenation and oxygen reduction. The rate of the reaction can be greatly enhanced by coupling these processes through electron transport between independent active sites. The ratio of Au/Pd catalysts used and their physical properties play important roles in promoting alcohol oxidation through cooperative redox enhancement (CORE).
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
