标題: Boosting hydrogen evolution kinetics of self-supported MoC-Mo2C heterojunction electrode by platinum decoration
作者: Li, WT (Li, Wenting); Yao, YP (Yao, Yuanpeng); Liu, XL (Liu, Xianglin); Zhang, Y (Zhang, Yu); Liu, W (Liu, Wei); Liu, Z (Liu, Ze); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)
來源出版物: ELECTROCHIMICA ACTA 卷: 483 文獻号: 143922 DOI: 10.1016/j.electacta.2024.143922 Early Access Date: MAR 2024 Published Date: 2024 APR 10
摘要: Molybdenum carbide -based hydrogen evolution reaction (HER) electrocatalysts have attracted widespread attention with their low cost and relatively high catalytic activity. Despite the significant progress made in tuning the morphology and structure, the intrinsic catalytic activity of molybdenum carbide awaits further improvement. Herein, a Pt -decorated self -supported MoC-Mo2C electrode with super -intrinsic HER catalytic activity is prepared by a simple adsorption-electroreduction method. The HER performance is improved with increasing the loading of Pt. The optimal MoC-Mo2C-Pt heterojunction electrode has a low overpotential of 10 mA cm -2 (58 mV in H2SO4, 82 mV in KOH) and small Tafel slope (24 mV dec- 1 in H2SO4, 29 mV dec- 1 in KOH), which is reduced to 0.45-0.5, 0.7-0.8, and 0.4-0.7 times of pristine MoC-Mo2C, Pt foil, and commercial Pt/C (2 mg cm -2), respectively. The improved HER catalysis is attributed to the rapid dissociation of water on MoC-Mo2C and efficient desorption of hydrogen on Pt. Therefore, decorating carbides with Pt is an effective way to design HER catalysts with enhanced catalytic activities in a wide pH range.
作者關鍵詞: Platinum; Molybdenum carbide; Hydrogen evolution reaction; Electrocatalysis
KeyWords Plus: BIFUNCTIONAL CATALYST; EFFICIENT; NANOWIRE
地址: [Li, Wenting; Liu, Xianglin; Zhang, Yu; Liu, Wei; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
[Yao, Yuanpeng; Liu, Ze] Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Peoples R China.
通訊作者地址: Wang, DH (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
電子郵件地址: wangdh@whu.edu.cn
影響因子：6.6
