Boosting Efficient Alkaline Hydrogen Evolution Reaction of CoFe-Layered Double Hydroxides Nanosheets via Co-Coordination Mechanism of W-Doping and Oxygen Defect Engineering
Shaohong Wang
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorJing Wu
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorYin Xu
Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan, Hunan, 411105 P. R. China
Hunan Key Lab for Environmental Behavior of New Pollutants and Control Principle, Xiangtan, Hunan, 411105 P. R. China
Search for more papers by this authorDandan Liang
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorDa Li
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorDahong Chen
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorGuohong Liu
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorCorresponding Author
Yujie Feng
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
E-mail: [email protected]
Search for more papers by this authorShaohong Wang
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorJing Wu
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorYin Xu
Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan, Hunan, 411105 P. R. China
Hunan Key Lab for Environmental Behavior of New Pollutants and Control Principle, Xiangtan, Hunan, 411105 P. R. China
Search for more papers by this authorDandan Liang
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorDa Li
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorDahong Chen
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorGuohong Liu
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
Search for more papers by this authorCorresponding Author
Yujie Feng
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, 150090 P. R. China
E-mail: [email protected]
Search for more papers by this authorAbstract
While surface defects and heteroatom doping exhibit promising potential in augmenting the electrocatalytic hydrogen evolution reaction (HER), their performance remains unable to rival that of the costly Pt-based catalysts. Yet, the concurrent modification of catalysts by integrating both approaches stands as a promising strategy to effectively address the aforementioned limitation. In this work, tungsten dopants are introduced into self-supported CoFe-layered double hydroxides (LDH) on nickel foam using a hydrothermal method, and oxygen vacancies (Ov) are further introduced through calcination. The analysis results demonstrated that tungsten doping reduces the Ov formation energy of CoFeW-LDH. The Ov acted as oxophilic sites, facilitating water adsorption and dissociation, and reducing the barrier for cleaving HO─H bonds from 0.64 to 0.14 eV. Additionally, Ov regulated the electronic structure of CoFeW-LDH to endow optimized hydrogen binding ability on tungsten atoms, thereby accelerating alkaline Volmer and Heyrovsky reaction kinetics. Specifically, the abundance of Ov induced a transition of tungsten from a six-coordinated to highly active four-coordinated structure, which becomes the active site for HER. Consequently, an ultra-low overpotential of 41 mV at 10 mA cm−2, and a low Tafel slope of 35 mV dec−1 are achieved. These findings offer crucial insights for the design of efficient HER electrocatalysts.
Conflict of Interest
The authors declare no conflict of interest.
Open Research
Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Supporting Information
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| smll202311221-sup-0001-SuppMat.pdf1.4 MB | Supporting Information |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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