(???????)Tuning Ni dopant concentration to enable co-deposited superhydrophilic self-standing Mo2C electrode for high-efficient hydrogen evolution reaction

Liu, Wei ¹Wang, Xiting ²Qu, Jiakang ¹Liu, Xianglin ¹Zhang, Zhaofu ³Guo, Yuzheng ²Yin, Huayi ¹Wang, Dihua¹

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作者信息

1. Int Cooperat Base Sustainable Utilizat Resources
2. Wuhan Univ
3. Univ Cambridge
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Abstract

Ni doping is an effective way to change the electronic structure of molybdenum carbide (Mo2C) to promote the hydrogen evolution reaction (HER) performance. However, the relationship between the Ni dopant concentration and HER activity remains to be explored. Herein, we prepare self-sanding Mo2C electrodes with different Ni concentrations, and employ density functional theory (DFT) calculations along with electrochemical tests to investigate the effect of the Ni dopant concentration on HER activity. The Mo and C come from the co-deposition of MoO(4)(2-)and CO(3)(2-)on a Ni substrate that supplies Ni dopant. The concentration of Ni dopant can be tuned by adjusting the temperature. The HER performance of the Mo2C electrodes with various Ni dopant concentrations is in line with DFT calculations that the optimized Ni-Mo2C-0.67 electrode has a lowest delta G(H*) value of -0.13 eV. Altogether, this work sheds light on controllably designing Ni-doped Mo2C electrodes for splitting water.

Key words

Electrochemical co-deposition/Hydrogen evolution reaction/Tunable Ni doping/Molybdenum carbide/Superhydrophilic characteristic/MOLYBDENUM-CARBIDE/CATALYTIC-ACTIVITY/POROUS FILMS/CARBON/OXYGEN/ELECTROCATALYST/NANOPARTICLES/FABRICATION/STABILITY/NANOWIRE

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量32

参考文献量46

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