标題: <p>(???????)Tuning Ni dopant concentration to enable co-deposited superhydrophilic self-standing Mo2C electrode for high-efficient hydrogen evolution reaction</p>

作者: Liu, W (Liu, Wei); Wang, XT (Wang, Xiting); Qu, JK (Qu, Jiakang); Liu, XL (Liu, Xianglin); Zhang, ZF (Zhang, Zhaofu); Guo, YZ (Guo, Yuzheng); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)

來源出版物: APPLIED CATALYSIS B-ENVIRONMENTAL 卷: 307 文獻号: 121201 DOI: 10.1016/j.apcatb.2022.121201 出版年: JUN 15 2022

摘要: 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.

入藏号: WOS:000787901200003

語言: English

文獻類型: Article

作者關鍵詞: Electrochemical co-deposition; Hydrogen evolution reaction; Tunable Ni doping; Molybdenum carbide; Superhydrophilic characteristic

地址: [Liu, Wei; Qu, Jiakang; Liu, Xianglin; Yin, Huayi; Wang, Dihua] Int Cooperat Base Sustainable Utilizat Resources, Wuhan, Peoples R China.

[Liu, Wei; Qu, Jiakang; Liu, Xianglin; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Wang, Xiting; Guo, Yuzheng] Wuhan Univ, Sch Elect Engn & Automat, Wuhan 430072, Peoples R China.

[Zhang, Zhaofu] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.

通訊作者地址: Yin, HY; Wang, DH (通訊作者)，Int Cooperat Base Sustainable Utilizat Resources, Wuhan, Peoples R China.

Guo, YZ (通訊作者)，Wuhan Univ, Sch Elect Engn & Automat, Wuhan 430072, Peoples R China.

電子郵件地址: yguo@whu.edu.cn; yinhuayi@whu.edu.cn; wangdh@whu.edu.cn

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