Article
Chemistry, Analytical
Biaolong Wang, Siqi Shen, Yifei Wang, Zhiguo Zhang, Yousheng Xu, Yange Suo
Summary: This work reports the synthesis of FeCo alloy encapsulated in N-doped carbon shell for efficient oxygen reduction reaction (ORR). The FeCoNC-0.3 compound was synthesized by high temperature pyrolysis of ZIF-L with the assistance of different Fe salts (i.e., FeCl3 · 6H2O, FeSO4 · 7H2O, K3Fe(CN)6, Fe(NH4)2 · (SO4)2 · 6H2O and (NH4)3 · Fe(C2O4)3 · 3H2O). FeCo alloys are formed and more nitrogen elements are remained after high temperature pyrolysis with FeCl3 · 6H2O, FeSO4 · 7H2O, Fe(NH4)2 · (SO4)2 · 6H2O and (NH4)3 · Fe(C2O4)3 · 3H2O, compared with CoNC derived from pure ZIF-L. Introduction of K3Fe(CN)6 cannot lead to the generation of FeCo alloy and less nitrogen elements are remained after high temperature pyrolysis, compared with CoNC. The FeCoNC-0.3 compound catalysts show a linear relationship between the ORR onset potential and the ID/IG value as well as with the increase of the total content of pyridinic-N + graphitic-N + Fe(Co)-Nx. Remarkable performance of FeCoNC-0.3FeCl3 catalyst towards ORR is achieved due to its unique core-shell structure, hierarchical channels, large pore volume, high content of carbon defects and high total content of pyridine-N, graphite-N and Fe(Co)-Nx. FeCoNC-0.3FeCl3 exhibits an onset potential of 0.97 V and half-wave potential of 0.82 V, comparable to Pt/C, along with higher durability and methanol tolerance. The Zn-air battery with FeCoNC-0.3FeCl3 as the cathode catalyst demonstrates a maximum power density of 105 mW cm-2, close to that with Pt/C as the cathode catalyst (127 mW cm-2).
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Review
Nanoscience & Nanotechnology
Wenjuan Li, Miaoran Zhang, Xuan Xie, Aoji Liang, Hui Peng, Guofu Ma, Yuxi Xu
Summary: This paper presents a rational and simple method for preparing FeCo bimetallic alloy nanoparticles on nitrogen-doped dodecahedral porous carbon. The synthesized catalyst exhibits a multilayered porous structure, a high specific surface area, and an abundance of active centers, resulting in excellent catalytic activity for the oxygen reduction reaction. The catalyst also demonstrates notable performance as an air cathode in a zinc-air battery, with high open-circuit voltage, specific capacity, and stability.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Wenxian Liu, Xinxin Niu, Jinxiu Feng, Ruilian Yin, Suli Ma, Wenbin Que, Jiale Dai, Jiawei Tang, Fangfang Wu, Wenhui Shi, Xijun Liu, Xiehong Cao
Summary: Fascinating transition metal nitrides and FeCo alloys were successfully integrated through a simple coordination assembly and pyrolysis process, and the alloy-to-nitride ratio in the heterogeneous catalyst can be regulated through the subsequent etching process. The optimized FeCo-Mo0.82N-60 catalyst exhibited a high peak power density of 149.7 mW cm-2 and an impressive stability of 600 h with a low charge-discharge voltage gap decay rate of 0.025 mV h-1 in aqueous ZABs. Furthermore, the FeCo-Mo0.82N-60-based flexible ZABs showed a small specific capacity degradation (3%) from 40 to -10 degrees C, demonstrating excellent temperature tolerance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Xiuyun Yao, Xueying Wang, Lixin Sun, Ling Li, Erjun Kan, Bo Ouyang, Wenming Zhang
Summary: In this study, a novel three-dimensional hierarchical structural electrocatalyst was synthesized, which showed outstanding performance in hydrogen evolution reaction and oxygen reduction reaction. It was also successfully applied in rechargeable zinc-air batteries and overall water splitting devices, demonstrating promising prospects for highly efficient trifunctional materials and applications.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Tiantian Fu, Guijun Li, Yang Xiang, Yibo Tang, Dongping Cai, Shuangshi Jiang, Yu Xue, Zhongping Xiong, Yujun Si, Chaozhong Guo
Summary: The synthesized bifunctional oxygen electrocatalyst Co-UA-OCB with heavy nitrogen content exhibits remarkable activity for oxygen reduction and evolution reactions, showing promising potential for rechargeable Zn-air batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ying Ye, Lei Zhang, Qiliang Zhu, Ziang Du, Thomas Wagberg, Guangzhi Hu
Summary: In this study, a novel Mott-Schottky catalytic site was successfully incorporated into an N-doping carbon nanobox, with consideration of the effects of intrinsic electric field and hollow/porous support carriers. The resulting heterogeneous catalyst exhibited promising performance for both oxygen reduction reaction and oxygen evolution reaction, leading to significant improvements in the performance of Zn-air batteries. The development of robust bifunctional oxygen catalysts through modulation of surface charge distribution and facilitation of mass transport offers a new avenue for future research.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Chemical
Miaoran Zhang, Mingxin Zhang, Kanjun Sun, Xuan Xie, Haikuo Lei, Hui Peng, Guofu Ma
Summary: A novel FeP nanoparticles self-embedded P, N-codoped hierarchical porous carbon catalyst (FeP@NPC-90-900) has been successfully synthesized, exhibiting excellent catalytic performance for oxygen reduction reactions (ORR). The catalyst shows high catalytic activity, stability, and good methanol resistance in alkaline media, surpassing the performance of commercial Pt/C catalysts.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Energy & Fuels
Yingbo Kang, Xiaotong Han, Haocheng Yuan, Bao Yu Xia, Ho Seok Park
Summary: By vertically assembling ReS2 nanosheets onto nitrogen-doped reduced graphene oxide, three-dimensional nanostructured electrocatalysts were constructed with fully exposed active sites and facilitated charge transfer. The synthesized ReS2/NRGO hybrids exhibit a relatively small Tafel slope and high diffusion-limited current density, showing great potential for practical applications in fuel cells and metal-air batteries.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Tongrui Zhang, Juanjuan Bian, Yuanqin Zhu, Chunwen Sun
Summary: The study presents an efficient catalyst consisting of FeCo nanoparticles embedded in N-doped carbon nanotubes for high ORR activity and excellent durability, with enhanced OER activity achieved through coupling with CoFe-layer double hydroxide. The air electrode using this catalyst exhibits high OCP, power density, and durability, showing promising practical applications for rechargeable zinc-air batteries.
Article
Engineering, Chemical
Sujung Park, NaHyun Park, Muthuchamy Nallal, Mohammad Yusuf, Sungkyun Park, Jae-Myung Lee, Kang Hyun Park
Summary: In this study, rhodium and cobalt alloy nanoparticles were deposited on nitrogen-doped carbon supports using ball milling and thermal decomposition. The resulting RhCo/NC nanocatalyst showed good catalytic activity and durability for the oxygen reduction reaction in fuel cells.
Article
Chemistry, Analytical
Shanhua Chen, Yanqing Huang, Ming Li, Panpan Sun, Xiaowei Lv, Bing Li, Liang Fang, Xiaohua Sun
Summary: The CoFe@CNT/MnO composite catalyst prepared on CFP by hydrothermal and CVD pyrolysis methods shows excellent OER and ORR performance in zinc-air batteries, with advantages such as low overpotential, high specific capacity, peak power density, and superior stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Heng Liu, Guangling He, Xuetao Liu, Yanlin Zhu, Siegfried Eigler, Lei Han
Summary: Nanostructured nitrogen-doped carbon materials with hierarchical porous structure and high specific surface area were synthesized using an ion-induced method, showing comparable oxygen reduction reaction performance and stability with commercial Pt/C. The resulting material exhibited good methanol tolerance and stability, leading to high performance in assembled Zn-air battery.
Article
Chemistry, Multidisciplinary
Dong-kyu Son, Sooan Bae, Shrine Maria Nithya Jeghan, Gibaek Lee
Summary: Highly efficient and durable FeCo-N,S@CNFs catalysts were synthesized for oxygen reduction reactions. The catalysts showed defect-rich active sites, enhancing the ORR activity, and exhibited long-term stability and high tolerance to methanol. The synergistic interactions between metals and heteroatoms played a crucial role in enhancing the ORR activity. These catalysts can be widely used in battery-based systems and fuel cell applications.
Article
Chemistry, Physical
Javier Quilez-Bermejo, Emilia Morallon, Diego Cazorla-Amoros
Summary: This study investigates the deactivation mechanism of N-doped carbon materials in the oxygen reduction reaction (ORR) through experiments and computational modeling. It reveals that in both acidic and alkaline environments, graphitic-type nitrogen species deactivate through oxidation and tautomerization reactions, resulting in the formation of N-C-O-type groups, which affect the catalytic activity.
Article
Chemistry, Physical
Meiling Fan, Peipei Liu, Yapeng Cheng, Haolin Tang, Bing Jin, Haining Zhang
Summary: In this work, catalyst with simultaneously engineered Fe-N4 and Co-N4 active sites and graphitic carbon multilayer-encapsulated FeCo alloy is developed, showing promising catalytic activity and good stability for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
Haixu Wang, Xiaogeng Feng, Xiangjie Bo, Ming Zhou, Liping Guo
Article
Chemistry, Analytical
Xia Niu, Xiangjie Bo, Liping Guo
Summary: In this study, simultaneous electrochemical determination of 4-aminophenol and acetaminophen was achieved using a novel electrocatalyst of nitrogen-doped carbon coated CoNi alloy. The optimal sensor demonstrated low detection limits and superior performance for both analytes, showing great potential for clinical applications. The sensor also exhibited excellent reproducibility, selectivity, and stability, with promising recoveries in real samples.
ANALYTICA CHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Jing Bai, Chengjia Peng, Wenjia Lv, Jingju Liu, Yashuang Hei, Xiangjie Bo
Summary: Introduction of vacancy engineering into polymer photosensitizers (PPSs) design, such as the novel PTh@Au NCs, enhances the efficiency of PDT for hypoxic tumors, offering a new strategy for highly efficient PDT applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Electrochemistry
Haixu Wang, Ming Zhou, Xiangjie Bo, Liping Guo
Summary: A novel cobalt-ruthenium nanoalloy coated with nitrogen-doped graphene has been reported in this study, showing efficient electrocatalytic performance for hydrogen evolution reaction across a wide pH range. This material offers a promising strategy for rapidly preparing electrode materials at room temperature and in the air.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Applied
Xia Niu, Xiangjie Bo, Liping Guo
Summary: A bimetallic Co/Ni-MOF derived hollow NiCo2O4@C composite modified glassy carbon electrode (NiCo2O4@C/GCE) was successfully constructed for the simultaneous detection of furazolidone (FZD) and chloramphenicol (CAP). The electrode showed excellent electrocatalytic performance, wide linear ranges and low limits of detection for both FZD and CAP, with reductions of FZD and CAP being four-electron and four-proton processes. The sensor exhibited desirable recoveries in milk and honey, showing potential for practical applications.
Article
Chemistry, Physical
Nan Wang, Xiangjie Bo, Ming Zhou
Summary: Developing durable and advanced electrocatalysts for pH-universal hydrogen evolution reaction is important. A method using laser conversion at room temperature was used to synthesize Ru@CN electrocatalysts from biomass honey, showing promising electrocatalytic activity. Control of Ru loading and laser power can effectively adjust the activity of the electrocatalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Guang Yang, Yihang Guo, Xiangjie Bo
Summary: A simple and fast laser-assisted coupling method was utilized to prepare rod-like carbon-coated Mo/MoO2 hybrids, showing high catalytic performance in a wide pH range. The combination of Mo and MoO2 into Mo/MoO2 composite favors the dissociation of water and adsorption of hydrogen, providing guidance for the development of hybrid electrocatalysts for HER applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Jiajia Li, Xiangjie Bo
Summary: The study utilized flexible graphene electrodes for on-site rapid detection of antibiotics or lean meat powder residue in food, with low detection limits and linear ranges, thus potentially being widely applied in food security.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Nan Wang, Xiangjie Bo, Ming Zhou
Summary: In this study, a rapid and single-step synthesis of Pt/VC nanocomposites with a three-dimensional porous structure was achieved using laser irradiation technology at room temperature. The Pt/VC nanocomposites exhibited superior activity and stability in the overall water splitting reaction.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yingjie Zhang, Zhuo Liu, Fei Guo, Mian Li, Xiangjie Bo
Summary: This study presents the preparation of Fe(x)Mny@NC materials as efficient HER/OER catalysts for water splitting. The optimized Fe3Mn1@NC catalyst exhibited high catalytic activity and stability under alkaline conditions, offering new insights for the development of low-cost water splitting devices in the future.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Xinyi Pei, Mimi Sun, Jingjuan Wang, Jing Bai, Xiangjie Bo, Ming Zhou
Summary: In the field of wearable devices, designing sensors that can simultaneously monitor sweat and wound exudate remains a challenge. This study proposes a single wearable tracker that can wirelessly, simultaneously, and dynamically measure multiple biomarkers in sweat or wound exudate. By seamlessly integrating microfluidic, sensing, and electronic modules, real-time tracking of these biomarkers is achieved.
Article
Chemistry, Physical
Zhuo Liu, Fei Guo, Lei Cheng, Xiangjie Bo, Tingting Liu, Mian Li
Summary: The design of high-efficiency and low-cost non-precious metal catalysts for water splitting devices is crucial for commercial applications. In this study, novel three-dimensional carbon nanowires embedded with iron and manganese metals were successfully designed, showing catalytic activities comparable to precious metals. The catalysts exhibited excellent stability as well.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Yanni Bi, Mimi Sun, Jingjuan Wang, Ziyu Zhu, Jing Bai, Mohammed Y. Emran, Ahmed Kotb, Xiangjie Bo, Ming Zhou
Summary: Fully integrated wearable sensors can directly and independently track biomarkers in raw noninvasive biofluids without any other equipment or accessories. We propose the first single universal FIWSAs for wirelessly and noninvasively measuring metabolites and electrolytes in sweat, saliva, or urine. This technology has the potential to enhance the understanding of biomarker levels in the body and facilitate self-health management.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Renlong Zhu, Xianglei Yu, Weichao Li, Mian Li, Xiangjie Bo, Guoyou Gan
Summary: The synthesis of new cobalt nanoparticles embedded in nitrogen-doped porous carbon nanocages and their application on the surface of biomass-derived hollow carbon fibers resulted in the efficient water-splitting catalytic activity of the Co@NC nanocage/HCF200 catalyst in alkaline solution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Mian Li, Fei Guo, Lan Xiao, Yibin Wang, Yingjie Zhang, Xiangjie Bo, Tingting Liu
Summary: In this study, a novel three-dimensional cobalt nanoparticles encapsulated in ultrahigh content of boron and nitrogen-doped hierarchically porous carbon nanofibers (Co@BN-PCNFs) catalyst was designed and synthesized. The catalyst showed excellent stability and catalytic performance in acidic solutions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
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)
