Article
Electrochemistry
Hang Zhou, Wei Zhao, Zeming Lu, Shoucheng He, Bo Yin, Yifeng Zheng, Lin Ge, Han Chen
Summary: Efficient non-noble metal bifunctional cathode catalysts for zinc-air batteries are difficult to develop. In this study, Ba-doped LaCoO3 material was prepared and evaluated as a promising bifunctional electrocatalyst for zinc-air batteries. It exhibited excellent catalytic activity and stability, attributed to its larger specific surface area and increase in oxygen vacancy.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Xingdong Jiang, Yucan Dong, Zhengmei Zhang, Junfu Li, Jinmei Qian, Daqiang Gao
Summary: In this study, LaCoO3-based materials were modified by substituting the Co site with Mn, resulting in samples with different compositions. The introduction of Mn led to an increase in the content of active Mn4+ and Co3+, improving the electrocatalytic activities. The optimization of oxygen catalytic activities was attributed to the increased electrical conductivity and the presence of Mn4+ and Co3+ ions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xingmei Liu, Liquan Fan, Yuwei Wang, Weichao Zhang, Honglin Ai, Ziteng Wang, Deqing Zhang, Hongge Jia, Chaohui Wang
Summary: The search for non-noble metal OER/ORR catalysts with excellent performance is of great significance. Introducing carbon into perovskite can significantly enhance oxygen electro-catalytic activity. In this study, nanofiber-based Sm0.5Sr0.5Co0.2Fe0.8O3-d/rGO and Sm0.5Sr0.5Co0.2Fe0.8O3-d/N-MWCNT hybrids were synthesized successfully and compared for their OER/ORR properties. SSCF28/N-MWCNT = 1.3 showed better catalytic activity than SSCF28/rGO = 2:1 in 0.1 M KOH. The optimized mass ratio of 1.3 remained stable after 1000 CV cycles and showed promising applicability in metal-air batteries. The excellent OER/ORR activity of SSCF28/N-MWCNT = 1:3 can be attributed to the component optimization of perovskite and carbon, as well as the synergistic effect between nanofiber-structured SSCF28 and N-functionalized MWCNT (N-MWCNT).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Multidisciplinary
Yue Jiao, Ke Xu, Huining Xiao, Changtong Mei, Jian Li
Summary: The ORR and OER are important electrochemical reactions in energy conversion and storage technologies, and noble-metal-based catalysts are typically used to enhance their kinetics. However, the high cost of noble metals limits their practical applications. Carbon-based catalysts, especially biomass-derived carbon aerogels, have emerged as a promising alternative with their affordability and excellent properties. This review focuses on various nanostructured materials based on biomass-derived carbon aerogels as ORR/OER catalysts, including metal atoms, metal compounds, and alloys.
Article
Engineering, Environmental
Xupo Liu, Yunpeng Liu, Cuicui Zhang, Ye Chen, Guanyu Luo, Zhitao Wang, Deli Wang, Shuyan Gao
Summary: Regulating pore architecture and electronic structure is important for enhancing the oxygen electrocatalytic activity of M-N-C catalysts. In this study, N, S co-doped hollow carbon nanocages confined Fe, Co bimetallic sites (FeCo-NS-HNCs) were fabricated through a surface bridging strategy. The synergy between metal sites and N, S co-doping improved the adsorption/desorption characteristics of M-Nx sites and the Kirkendall effect facilitated the construction of hollow carbon nanocages, leading to excellent bifunctional oxygen electrocatalytic activity of FeCo-NS-HNCs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Anil U. Kumar, Asis Sethi, Reen Maria Lawrence, Vishal M. Dhavale
Summary: A Co-Co3O4/NC catalyst with high stability and low overvoltage has been synthesized and shown to be efficient for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline conditions, potentially leading to energy savings compared to traditional Pt/C and IrO2 catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Hong Zhao, Huixue Yao, Shuting Wang, Yali Cao, Zhenjiang Lu, Jing Xie, Jindou Hu, Aize Hao
Summary: In this study, a highly efficient oxygen electrocatalyst with enhanced oxygen reduction and oxygen evolution activities was developed through doping engineering strategy. The catalyst showed superior performance and paved the way for designing high-performance bifunctional cobalt-based electrocatalysts for rechargeable metal-air batteries application.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Seunggun Choi, Jiseok Kwon, Seonghan Jo, Sojung Kim, Keemin Park, Sungmin Kim, Hyuksu Han, Ungyu Paik, Taeseup Song
Summary: A highly efficient and durable HER and ORR bifunctional electrocatalyst derived from Ni metalorganic frameworks, NiFeP@Ni_NC, is proposed in this study to address the issue of undesirable oxidation of cathode electrocatalysts during alkaline electrolysis. By introducing decoupled active sites for ORR and HER in the hybrid material, excellent bifunctional stability is achieved for NiFeP@Ni_NC, demonstrating a strategy that can be widely extended to design bifunctional electrocatalysts with improved stability in alkaline electrolysis.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Ceramics
Masayoshi Yuasa
Summary: This study successfully synthesized Nb-doped TiO2 rod-like particles and applied them in ORR/OER bifunctional GDEs for metal-air batteries, demonstrating high stability and activity. Heat treatment was used to reduce thermal agglomeration of the particles, resulting in increased electrical conductivity and OER activity. The reduced Nb-doped TiO2 rod-like particles showed superior performance compared to rGO as a catalyst support in ORR/OER bifunctional GDEs.
CERAMICS INTERNATIONAL
(2022)
Article
Electrochemistry
Xiao-Li Wang, Zhou Wu, Xiang Wang, Chaozhuang Xue, Chengdong Liu, Jiaxu Zhang, Rui Zhou, Dong-Sheng Li, Tao Wu
Summary: This study utilized a simple self-assembly method to fabricate a series of novel ternary sulfide hybrids as oxygen electrocatalysts, showing superior catalytic activity, thus providing more promising non-noble metal materials for energy application.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Shaohui Zhang, Qingxin Li, Haikun Zhou, Wei Xuan, Yili Liang, Zhiyong Xie, Feng Liu
Summary: This paper presents the synthesis of Pd catalysts supported on novel composite carbon supports through carbonization and hydrogen reduction, showing excellent ORR electrocatalytic performance. Pd/carbonized-bacteria-rGO exhibits the best catalytic performance with a mass activity 9.58 times higher than commercial Pd/C and better stability. The enhanced performance is attributed to nitrogen doping and flexible carbon-coating microstructure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Ruimin Li, Rong Zhang, Boyang Zhang, Wei Fang, Yalei Qiao, Wenyang Wang, Zixiang Cui, Ding Zhang
Summary: Bifunctional catalyst Co3O4/N-rGO with particle size of 27-31 nm, prepared using a one-pot synthesis method, exhibits better ORR and OER activity, excellent current stability, and methanol tolerance compared to commercial Pt/C and RuO2/C.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2021)
Article
Chemistry, Physical
Xuhui Li, Yanpin Liu, Haifei Xu, Yangfan Zhou, Xinbing Chen, Zhongwei An, Yu Chen, Pei Chen
Summary: Highly efficient bifunctional catalysts for ORR and OER are essential for rechargeable Zn-air batteries. In this study, Fe3O4 and CoO nanoparticles were integrated into carbon nanoflowers to create an electrocatalyst that reduced the potential gap between ORR and OER to 0.79 V. The Zn-air battery assembled with this catalyst exhibited superior performance compared to Pt/C, including a higher open-circuit voltage, longer discharge time, higher specific capacity, and larger power density.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Bryan R. Wygant, Brian A. Washington, Ciara N. Wright, Gabriel A. Goenaga, Thomas A. Zawodzinski, Timothy N. Lambert
Summary: Nickel sulfoselenides (NiSSe) are promising electrocatalysts for oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and bifunctional oxygen electrocatalysis (BOE). Tuning the S/Se composition of Ni(3)S(2-x )Se( x ) NiSSe influences electrocatalytic performance, with a near unity S/Se ratio optimal for OER and Se-rich compositions optimal for ORR and BOE applications. By adding Se, the oxidative stability and electrocatalytic performance of NiSSe are improved. NiSSe electrocatalysts are more stable than commercial Pt/C electrocatalysts in Zn-air batteries.
Article
Chemistry, Multidisciplinary
Muhammad Arif, Salma Bilal, Anwar Ul Haq Ali Shah
Summary: This paper presents a detailed study on the synthesis of low-cost and efficient nitrogen-doped reduced graphene oxide nickel-silver (N-rGO-Ni/Ag) and nickel-cobalt (N-rGO-Ni/Co) nanocomposites as electrocatalysts in fuel cells. The nanocomposites exhibit remarkable electrocatalytic activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), with low onset and half wave potentials and satisfactory Tafel values.
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)