Article
Biochemistry & Molecular Biology
Zhuo Chen, Qiang Qu, Xinsheng Li, Katam Srinivas, Yuanfu Chen, Mingqiang Zhu
Summary: This study presents a facile and cost-effective method to synthesize NiFe-LDH@CNT as OER electrocatalysts. The hybrid catalyst exhibits outstanding OER activity, low onset overpotential, small Tafel slope, and excellent long-term stability. The high catalytic capability of NiFe-LDH@CNT is attributed to its room-temperature synthesized amorphous structure, bi-metallic modulation, and conductive CNT skeleton.
Article
Chemistry, Physical
Shrine Maria Nithya Jeghan, Nangyeong Kim, Gibaek Lee
Summary: 3D hierarchical ternary NiCoMo-layered double hydroxide (NiCoMo-LDH) spheres were fabricated via a one-pot hydrothermal method and showed high efficiency as electrocatalysts for the OER and HER. The NiCoMo-LDH exhibited remarkable electrocatalytic activity for overall water splitting with long-term stability, making it a promising candidate for use in industrial applications such as rechargeable metal-air batteries.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
M. Ning, L. Wu, F. Zhang, D. Wang, S. Song, T. Tong, J. Bao, S. Chen, L. Yu, Z. Ren
Summary: Electrochemical seawater splitting using a Fe2+-driven NiFe layered double hydroxide as a catalyst shows high activity and stability in alkaline seawater electrolyte. Coupling with a good hydrogen evolution reaction catalyst, the two-electrode electrolyzer exhibits excellent electrolysis performance in natural seawater. The oxidation of Fe2+ is a universal mechanism for the growth of efficient OER catalysts.
MATERIALS TODAY PHYSICS
(2021)
Article
Chemistry, Physical
Jun Zhang, Lin Hao, Zitong Chen, Yongjun Gao, Huan Wang, Yufan Zhang
Summary: In response to the demand for clean and renewable energy technologies, researchers have developed economically feasible and stable non-precious electrocatalysts for the oxygen evolution reaction (OER). A highly efficient Ni-NCN/CoFe-LDH composite catalyst was produced by embedding Ni nanoparticles into nanoporous carbon nanorods and electrodepositing them on CoFe-layered double hydroxide (LDH) nanosheets. The composite exhibited excellent catalytic activity with low overpotential, small Tafel slope, and good durability, attributed to the synergistic effect of multiple composites, enhanced electron transport, and uniformly dispersed Ni nanoparticles. The Ni-NCN/CoFe-LDH catalyst showed higher OER performance compared to Niundoped carbon nanorod/LDH, indicating the significant contribution of Ni dopant and LDH to overall OER performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Meng Li, Yujie Huang, Jiaqi Lin, Meize Li, Mengqi Jiang, Linfei Ding, Dongmei Sun, Kai Huang, Yawen Tang
Summary: In this study, carbon nanotube interconnected NiCo layered double hydroxide rhombic dodecahedral nanocages (NiCo-LDH RDC@CNTs) were successfully synthesized as a highly efficient electrocatalyst for the oxygen evolution reaction (OER). The catalyst exhibited a large active surface area, enhanced electron transfer capacity, and multidimensional mass diffusion channels, resulting in remarkable OER activity and stability.
Article
Nanoscience & Nanotechnology
Xuesheng Yan, Zhaolong Wang, Jian Bao, Yanhua Song, Xiaojie She, Junjie Yuan, Yingjie Hua, Guoai Lv, Huaming Li, Hui Xu
Summary: Electrochemical water splitting for hydrogen production is an environmentally friendly and economical method, but the slow oxygen evolution reaction (OER) at the anode hampers the application of electrolysis technology. In this study, a two-dimensional CoMo Layered Double Hydroxide nanosheets were synthesized and deposited on conductive carbon nanotubes, resulting in a low-cost and efficient OER electrocatalyst.
Article
Chemistry, Physical
Qing Shi, Hantao Liu, Junfei Liang, Yaohui Zhang, Yaqian Dong, Weiyou Yang, Qiao Liu
Summary: In this work, a one-pot strategy was developed to fabricate NiFe layered double hydroxide nanosheets interconnected by carbon nanofibers, which exhibited enhanced oxygen evolution reaction (OER) catalytic activity and stability. The catalyst showed great potential for cost-efficient water splitting devices.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Multidisciplinary
Bhargavi Rani Anne, Joyjit Kundu, Mrinal Kanti Kabiraz, Jeonghyeon Kim, Daeheum Cho, Sang-Il Choi
Summary: The harsh conditions of the oxygen evolution reaction (OER) severely degrade the activity and stability of electrocatalysts. Incorporating support materials that effectively immobilize catalyst particles is crucial for developing efficient OER catalysts. This review highlights the role of MXene as a support material to improve OER performance. It discusses the effects of MXene support on OER catalysts, synthesis methods, beneficial properties of MXene, electrocatalytic results, and future challenges and prospects of utilizing MXene as a support material.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Analytical
Meihui Ying, Yongguan Liu, Xing Lin, Huiling Ye, Haibo Pan, Min Du
Summary: This study presents a cost-effective method for the precise screening and design of highly active oxygen evolution reaction (OER) electrocatalysts based on the theory of electronegativity equilibrium. By investigating the relationship between metal ion electronegativity and the adsorption and desorption capacity of OER reaction intermediates, the researchers identified an ideal catalyst with the lowest interfacial charge transfer resistance and intermediate adsorption and desorption resistance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Haoyue Zhang, Lingling Wu, Ruohan Feng, Sihong Wang, Chia-Shuo Hsu, Yuanman Ni, Ashfaq Ahmad, Chaoran Zhang, Haofei Wu, Hao-Ming Chen, Wang Zhang, Yao Li, Pan Liu, Fang Song
Summary: Oxygen vacancies (Ov) engineering has been shown to greatly enhance electrocatalytic kinetics for oxygen evolution reaction (OER) by improving electronic transport. However, the mechanism behind this enhancement is not well understood. In this study, we investigate the role of superficial Ov in enhancing the catalytic potential of NiFe layered double hydroxides for OER. We find that superficial Ov engineering significantly reduces the charge transport resistances and modulates the utilization rate of active sites for OER catalysis.
Article
Chemistry, Physical
Hua Yang, Zihao Zhou, Huijuan Yu, Hongli Wen, Runnong Yang, Shaomin Peng, Ming Sun, Lin Yu
Summary: Efficient and economic bifunctional electrocatalyst for water splitting to produce hydrogen is urgently required. Layered double hydroxides (LDHs) are effective for oxygen evolution reaction (OER) but show challenging hydrogen evolution reaction (HER) activity. A hydrothermal-treatment strategy enhances the HER and OER performance of NiCo-LDH by creating metal vacancies and forming Ni/Co(OH)2 phase, tuning electronic structure, and improving electrical conductivity. The resulting NiCo-LDH-OH catalyst exhibits significantly reduced overpotentials for both HER and OER, and demonstrates superior activity for overall water splitting with no decay after 20 hours. This work paves a new path for efficient LDHs-based HER/OER bifunctional catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Mengting Duan, Mingjun Qiu, Shangqing Sun, Xingmei Guo, Yuanjun Liu, Xiangjun Zheng, Fu Cao, Qinghong Kong, Junhao Zhang
Summary: The synthesis and exfoliation of NiFe LDH nanosheets, followed by assembling with carbon nanotubes, forms an intercalating heterostructure that provides sufficient active sites and efficient charge transport channels for superior OER catalysis performance. The optimized composite shows better OER activity than RuO2 due to the synergy between active NiFe LDH and conductive CNTs, as well as the high accessible surface area of the intercalated structure.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Yidong Hu, Gan Luo, Liguang Wang, Xiaokang Liu, Yunteng Qu, Yansong Zhou, Fangyao Zhou, Zhijun Li, Yafei Li, Tao Yao, Can Xiong, Bo Yang, Zhenqiang Yu, Yuen Wu
Summary: Hybrid amorphous/crystalline FeCoNi LDH-supported single Ru atoms catalysts exhibit highly efficient oxygen evolution reaction performance with extremely low overpotential, attributed to the synergistic effects of abundant defect sites, unsaturated coordination sites, and highly symmetric rigid structure providing stability for long-lasting OER.
ADVANCED ENERGY MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Ting Wang, Weiwen Wang, Wenjie Shao, Mingru Bai, Mi Zhou, Shuang Li, Tian Ma, Lang Ma, Chong Cheng, Xikui Liu
Summary: Water electrolysis is crucial for producing clean fuels, with oxygen evolution reaction (OER) electrocatalysts playing a key role. Among them, nanostructured layered double hydroxides (nLDHs) as a member of the big family of two-dimensional materials have shown significant progress and breakthroughs for OER, with enhanced catalytic performances through strategies such as compositional substitution and heteroatom doping.
Article
Chemistry, Physical
Fu-Ming Qi, Wei Xu, Jian-Li Mi
Summary: In this study, a CoFe@CoNi hydroxides composite supported on nickel foam was prepared as an electrocatalyst for oxygen evolution reaction (OER). The composite exhibited an amorphous structure with a hierarchical nanostructure, providing abundant electrochemically active surface area and exposed active sites, promoting the catalytic activity for OER. The core-shell hierarchical nanostructure further improved the catalytic activity through the synergetic interaction of CoFe and CoNi hydroxides.