NiMo@C3N5 heterostructures with multiple electronic transmission channels for highly efficient hydrogen evolution from alkaline electrolytes and seawater

被引:74
作者
Bu, Xiuming [1 ]
Liang, Xiongyi [1 ]
Bu, Yu [2 ]
Quan, Quan [1 ]
Meng, You [1 ]
Lai, Zhengxun [1 ]
Wang, Wei [1 ]
Liu, Chuntai [4 ]
Lu, Jian [2 ,3 ,5 ]
Wu, Chi-Man Lawrence C. [1 ]
Ho, Johnny [1 ,6 ]
机构
[1] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong 999077, Peoples R China
[2] City Univ Hong Kong, Ctr Adv Struct Mat, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
[3] City Univ Hong Kong, Dept Mech Engn, Hong Kong 999077, Peoples R China
[4] Zhengzhou Univ, Key Lab Adv Mat Proc & Mold, Minist Educ, Zhengzhou 450002, Peoples R China
[5] City Univ Hong Kong, Ctr Adv Struct Mat, Greater Bay Joint Div, Shenyang Natl Lab Mat Sci,Shenzhen Res Inst, Shenzhen 518057, Peoples R China
[6] City Univ Hong Kong, State Key Lab Terahertz & Millimeter Waves, Hong Kong 999077, Peoples R China
关键词
Core-shell hybrid; Heterostructure; Electron redistribution; Hydrogen evolution reaction; Seawater electrolysis; OXYGEN EVOLUTION; DOPED CARBON; ELECTROCATALYSTS; NANOSHEETS; OPPORTUNITIES; SITES;
D O I
10.1016/j.cej.2022.135379
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Designing highly efficient and stable electrocatalysts for hydrogen evolution reaction (HER), particularly in seawater, still remains a challenging task. Herein, the unique heterostructures composed of 1D NiMo cores and 2D C3N5 shells (NiMo@C3N5) are rationally designed and demonstrated as the robust HER catalysts in both alkaline electrolytes and natural seawater, where the carbon-based shell can effectively protect the catalyst core from seawater poisoning. Based on the experimental investigation and density functional theory calculation, multiple electronic transmission channels were found to establish at the interface between NiMo cores and C3N5 shells, thus providing efficiently optimized HER pathways to achieve minimized overpotential with a reduced energy barrier of the rate-determining step. More importantly, the NiMo@C3N5 hybrids exhibit stable HER performance with a high Faradaic efficiency of 94.8% in seawater, which is superior to that of commercial Pt/C. All these results can evidently highlight a feasible strategy to develop high-performance HER electrocatalysts via interface engineering.
引用
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页数:10
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