Article
Chemistry, Applied
Daniel Arulraj Abraham, Aswathy Rajan, M. D. Dhileepan, Masakazu Anpo, Bernaurdshaw Neppolian
Summary: We developed a strategy to prevent the photo-corrosion of CdSNRs by coating them with Ce2S3 and NG, which increased their stability and extended their absorption in visible and NIR regions. The prepared CdSNRs/Ce2S3 photocatalysts showed a 10 times higher H2 production compared to pure CdSNRs, and CdSNRs/Ce2S3 supported by NG exhibited a 24 times higher H2 production. The NG-CdSNRs/Ce2S3 photocatalysts also demonstrated high stability and improved charge carrier separation.
Review
Environmental Sciences
Zhigang Li, Kexin Li, Pinru Du, Mohammad Mehmandoust, Fatemeh Karimi, Nevin Erk
Summary: The article emphasizes the importance of converting solar energy into environmentally friendly and cost-effective technologies like water splitting, and discusses the application of carbon-based materials in photocatalytic reactions and methods to enhance their photocatalytic activity.
Article
Chemistry, Physical
Rafat Tahawy, Esmail Doustkhah, El-Sayed A. Abdel-Aal, Mohamed Esmat, Fatma E. Farghaly, Hamza El-Hosainy, Nao Tsunoji, Fouad El-Hosiny, Yusuke Yamauchi, M. Hussein N. Assadi, Yusuke Ide
Summary: The new type of GR synthesized through a one-pot solvothermal reaction exhibits excellent oxidation and chemical stabilities, making it suitable for solar photocatalytic hydrogen production. Compared to conventional GR, it has higher crystallinity and layer charge density, resulting in enhanced stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Electrochemistry
Michela Sanna, Siowwoon Ng, Martin Pumera
Summary: The growing consumption of global energy presents challenges for environmental protection and energy supplies. Introducing clean and sustainable energy sources, like photo-electrochemical hydrogen fuel production, shows promise as a solution. Transition metal trichalcogenphosphites, especially ZnPSe3, have potential as photocatalysts for the hydrogen evolution reaction, showing low overpotential and high response to light in acidic media.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Ju-Ting Lee, Yu-Chen Chang, Ming-Yen Wey
Summary: This study developed a PS-PNS-PVP photocatalyst film for photocatalytic hydrogen production. The PS concentration was found to affect the stability, optical, and electrical properties of the film, while the dispersion of the photocatalyst in the film influenced the activity under various concentrations. Adjusting the PS concentration and using a pore-forming agent led to improved film stability and dispersibility, ultimately increasing the hydrogen production of the photocatalyst film.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Hamza El-Hosainy, Rafat Tahawy, Mohamed Esmat, Maged El-Kemary, Yusuke Ide
Summary: The immobilization of iron minerals, ferric iron hydroxy sulfates (FHS), on a natural layered silicate, magadiite, as a photocatalyst, can efficiently produce hydrogen from formic acid under solar simulator irradiation, with a production rate higher than other iron minerals and comparable to precious metal-based photocatalysts. This result may pave the way for designing efficient photocatalysts for hydrogen production from formic acid in an economically and environmentally friendly manner.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Yuqing Hu, Puhui Deng, Wenying Wang, Linping Zhang, Yu Hou
Summary: Element doping and collaboration with other cocatalysts are important strategies to improve CdS's photoelectrochemical properties. In this study, manganese cadmium sulfides (MnxCd1-xS) were synthesized by a solvothermal method. The Mn0.5Cd0.5S sample showed the best photocatalytic hydrogen production, and further enhancement was achieved by coupling Ni-POMs as cocatalysts. The highest efficiency was observed for 15-Ni-4-Mn0.5Cd0.5S, which formed a double type-II heterojunction.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Kai Wu, Renqian Jiang, Yulong Zhao, Liang Mao, Xiuquan Gu, Xiaoyan Cai, Mingshan Zhu
Summary: This work presents a unique hierarchical hollow heterojunction structure with NiCo2S4 as a non-noble metal co-catalyst encapsulated in ZnIn2S4. The NiCo2S4/ZnIn2S4 composite exhibits excellent photocatalytic activity and significantly improved hydrogen production under visible light irradiation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Virgil Andrei, Qian Wang, Taylor Uekert, Subhajit Bhattacharjee, Erwin Reisner
Summary: This article introduces thin film technologies for solar fuel synthesis. The different thin film technologies, including artificial leaves and PC sheets, are compared based on their micro- and nanostructure, operation principle, and product/reaction scope. The article also discusses performance evaluation metrics for solar fuel panels, as well as the opportunities and challenges in commercialization and applications.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Virgil Andrei, Qian Wang, Taylor Uekert, Subhajit Bhattacharjee, Erwin Reisner
Summary: This article compares different thin film technologies based on their micro- and nanostructure, operation principle, and product/reaction scope. It discusses the performance and commercialization opportunities and challenges of solar fuel panels, and proposes new metrics for evaluating performance. In addition, it identifies emerging applications beyond fuels.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Review
Chemistry, Physical
Areen Sherryna, Muhammad Tahir, Walid Nabgan
Summary: Photocatalytic hydrogen production using layered double hydroxide (LDH) as a catalyst has gained attention for its compositional flexibility, controllable morphology, and tunable band gap, leading to efficient solar energy conversion. This article discusses the recent developments in LDH-based nanocomposites for enhancing photo catalytic hydrogen production efficiency, along with strategies for heterojunction engineering and band gap tuning. Future recommendations for the development of LDH-based photocatalysts in the field of photocatalysis are also outlined.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Multidisciplinary
Noemi Pirrone, Federico Bella, Simelys Hernandez
Summary: This article critically outlines the recent developments in solar-driven water splitting for hydrogen production. It describes the three fundamental types of devices (photocatalytic, photoelectrochemical, and photovoltaic-electrolyzer) in terms of working principles and highlights the progress in materials optimization and device engineering, emphasizing the limitations of large-scale application. The article also considers the feasibility of sun-driven hydrogen production from an economic perspective and explores the potential integration of this technology in the world energy supply scenario.
Article
Chemistry, Physical
Jining Zhang, Yifan Lei, Shuang Cao, Wenping Hu, Lingyu Piao, Xiaobo Chen
Summary: The study investigates brookite, anatase, and rutile TiO2 nanoparticles as photocatalysts for seawater splitting, demonstrating that brookite TiO2 exhibits higher efficiency and stability in hydrogen production compared to anatase and rutile TiO2. No Cl2 is detected in the solar hydrogen production from seawater as Cl- ions undergo oxidation and reduction cycles.
Article
Materials Science, Multidisciplinary
T. P. Rugma, Sandeep Kumar Lakhera, Trilochan Sahoo, Bernaudshaw Neppolian
Summary: This study reports a Na2H2PO4 treated P-g-C3N4/CuI photocatalyst that improves charge carrier separation efficiency at the interface. The P-CN/CuI photocatalyst shows a 22 times higher hydrogen production compared to bare g-C3N4. Therefore, non-metal doping and formation of a p-n heterojunction are important for solar energy conversion applications using polymeric g-C3N4.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Chemistry, Physical
Chunqing Ji, Wenjing Wang, El-Sayed M. El-Sayed, Guoliang Liu, Yanan Si, Kongzhao Su, Zhanfeng Ju, Fan Wu, Daqiang Yuan
Summary: Platinum complexes have been widely used as catalysts for hydrogen production from water due to their high work function and redox potential. The functionalized Zr-Bpydc-PtCl2 MOCs show good stability and high photocatalytic efficiency in producing H-2, indicating the promising approach of integrating catalyst molecules into MOCs for improving the efficiency of water hydrogen production.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Jie Zeng, Kamakshaiah Charyulu Devarayapalli, Changping Li, S. V. Prabhakar Vattikuti, Jaesool Shim
Summary: In this study, a new bimetallic metal-organic framework (BMOF) electrode was successfully developed using a solvo-hydrothermal strategy. The electrode exhibited significant capacitance and excellent energy and power densities, with good capacity retention after cycling, providing a viable approach for fabricating hybrid electrode materials for high-performance energy storage systems.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Environmental Sciences
Ganesh Koyyada, Burragoni Sravanthi Goud, Kamakshaiah Charyulu Devarayapalli, Jaesool Shim, S. V. Prabhakar Vattikuti, Jae Hong Kim
Summary: In this study, mixed-phase BiFeO3/Fe2O3 (BF-M) nanocomposite was successfully prepared and characterized. The performance of the BF-M catalyst was evaluated in photoelectrochemical water oxidation and photocatalytic dye degradation analysis. The results showed that the BF-M photocatalyst exhibited higher degradation efficiency and photocurrent density compared to the partials Fe2O3 with BiFeO3 (BF-P), which is attributed to the formation of a mixed-phase nano structure interface.
Article
Chemistry, Physical
Kamakshaiah Charyulu Devayulalli, Jaewon Lee, Sinwoo Kang, Sanghyeon Moon, S. V. . Prabhakar Vattikuti, Jaeyoung Lee, Kiyoung Lee
Summary: Precious metal-free electrocatalysts are crucial for the production of green hydrogen using low-cost electrolysis technology. This study proposes a low-cost electrocatalyst composed of cadmium sulfide nanoparticles decorated in a Cobalt-based metal-organic framework, showing excellent electrochemical reactivity and stability, making it a promising electrolyzer for commercial power market.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Tatiparti Padma, Dheeraj Kumar Gara, Amara Nadha Reddy, Surya Veerendra Prabhakar Vattikuti, Christian M. Julien
Summary: MoSe2-WS2 nanocomposites with improved photocatalytic hydrogen evolution performance were successfully synthesized via a hydrothermal method. Under LED irradiation, MoSe2-WS2 exhibited a significantly higher hydrogen evolution rate compared to pristine WS2, suggesting its potential as a promising photocatalyst for energy conversion and storage.
Article
Materials Science, Ceramics
Ala Manohar, V. Vijayakanth, S. V. Prabhakar Vattikuti, Ki Hyeon Kim
Summary: Supercapacitors are extensively researched as one of the most promising energy storage devices due to their unique advantages. Mixed spinel ferrites have been widely used in electrochemical (EC) devices, thanks to their exceptional chemical stability and significant surface area. Nanoscale spinel ferrite particles have several promising applications compared to bulk materials, mainly influenced by particle sizes and surface coordinating environments.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Kamakshaiah Charyulu Devarayapalli, Jie Zeng, Dae Sung Lee, S. V. Prabhakar Vattikuti, Jaesool Shim
Summary: This paper reports the development of advanced functional materials for photocatalytic hydrogen generation using abundant solar energy. Platinum quantum sized particles were deposited on bismuth oxybromide nanostructures, resulting in improved photocatalytic activity due to the synergistic effect of exposed (101) and (110) planes. The synthesized nanostructure catalyst showed significantly higher hydrogen generation efficiency compared to bare bismuth oxybromide.
Article
Materials Science, Multidisciplinary
Ala Manohar, V. Vijayakanth, S. V. Prabhakar Vattikuti, Ki Hyeon Kim
Summary: The particle size of spinel ferrite nanoparticles plays a crucial role in determining their properties and behavior in biomedical applications. This review focuses on the role of nanoparticle size in various biomedical applications, including induction heating, photocatalysis, and cytotoxicity. The review also discusses the biocompatibility properties and potential applications of spinel ferrite nanoparticles in medicine and the environment.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Ala Manohar, V. Vijayakanth, S. V. Prabhakar Vattikuti, Ki Hyeon Kim
Summary: In this study, the electrochemical characteristics and considerable size of Ca-doped ZnFe2O4 nanoparticles were investigated. The prepared nanoparticles showed a cubic spinel crystal structure and efficient electrochemical properties. Cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy were used to explore the electrochemical properties of the prepared electrodes. The Ca0.1Zn0.9Fe2O4 electrode demonstrated a specific capacitance of 208 Fg(-1) at a 2 mV/s scan rate, making it a promising electrode material for supercapacitor applications.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Jie Zeng, Kamakshaiah Charyulu Deyarayapalli, Changping Li, S. V. Prabhakar Vattikuti, Jaesool Shim
Summary: In this study, a binder-free two-dimensional mesh-like structure of nickel-zinc metal-organic framework was developed for electrochemical storage application. The electrodes self-assembled on carbon cloth substrates exhibited remarkable performance, with high capacitance and good capacity retention.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Review
Biochemistry & Molecular Biology
Surya V. Prabhakar V. Vattikuti, Jie Zeng, Rajavaram Ramaraghavulu, Jaesool Shim, Alain Mauger, Christian M. Julien
Summary: This article mainly introduces the tremendous development of bismuth-based nanostructures (BBNs) in the fields of photocatalysis and electro-catalysis. The methods of optimizing surface engineering to improve charge transport and the separation of available photocatalysts are discussed, and different strategies for enhancing photocatalytic activity are summarized. The surface plasmon resonance effect for photocatalytic enhancement is examined, and the photocatalytic mechanism of bismuth-based photocatalysts is discussed in detail, considering different semiconductor junctions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Ceramics
Ala Manohar, V. Vijayakanth, S. V. Prabhakar Vattikuti, Ki Hyeon Kim
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Ala Manohar, V. Vijayakanth, S. V. Prabhakar Vattikuti, Ki Hyeon Kim
Summary: Supercapacitors, with their long cycle life, significant power storage capacity, and quick recharge ability, have gained great interest from scientists. Recent research has identified transition metal oxides as the best material for flexible supercapacitors. Characterization studies using XRD, FE-SEM, EDS mapping, ESR, and BET have shown that synthesized Ni-doped MgFe2O4 nanoparticles, with a typical size range of 8-11 nm, exhibit exceptional performance as pseudocapacitors. The Ni0.35Mg0.65Fe2O4 electrode, coded as NM3, demonstrated a specific capacitance of 119.04 F/g at a current density of 1.1 A/g in 1 M KOH solution, outperforming NM1 and NM2 electrodes. EIS analysis confirmed the excellent electrochemical properties of these nanoparticles, suggesting their potential for supercapacitor applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
M. Chandra Sekhar, Nadavala Siva Kumar, Mohammad Asif, Surya Veerendra Prabhakar Vattikuti, Jaesool Shim
Summary: An innovative 2D/0D g-C3N4/CeO2 nanostructure was synthesized using a simple precursor decomposition process. The nanostructure exhibited a capacitance of 202.5 F/g, remarkable rate capability, and stability, surpassing the performance of g-C3N4 electrode. The combination of g-C3N4 and CeO2 quantum dots also enabled an asymmetric device with the highest energy density (9.25 Wh/kg) and power density (900 W/kg).
Article
Chemistry, Physical
Surya. V. Prabhakar Vattikuti, Nguyen To Hoai, Jie Zeng, Rajavaram Ramaraghavulu, Nam Nguyen Dang, Jaesool Shim, Christian M. M. Julien
Summary: Bimetal-organic frameworks (BMOFs) have gained attention as electrode materials for energy storage devices due to their precise control of porous structure, surface area, and pore volume. In this study, a NiCo-MOF (NCMF) with a three-dimensional hierarchical nanorod-like structure was prepared using a solvo-hydrothermal method. The NCMF exhibited excellent electroactivity when used as the positive electrode in a hybrid pouch-type asymmetric supercapacitor device (HPASD). The assembled HPASD showed high specific capacitance, energy density, and cycling stability, indicating the potential of the NCMF as a high-energy-density electrode material for supercapacitors.
Article
Chemistry, Multidisciplinary
Surya Veerendra Prabhakar Vattikuti, J. Pundareekam Goud, P. Rosaiah, P. Reddy Prasad, Ammar M. Tighezza, Jaesool Shim
Summary: This study successfully synthesized a novel sunlight-powered photocatalyst CN-CO, which exhibited remarkable photocatalytic activity and methanol oxidation reaction activity. The outcomes of this research shed light on the design of nanostructures and the development of efficient photocatalytic materials.
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)
