Controllably constructed carbide/oxide heterointerfaces of molybdenum for efficient hydrogen evolution

Sun, ShiXin, Liu, Yuxuan, Xu, Guodong, Jiang, Congcong, Li, Jing, Fan, Liyuan, and Cai, Weiwei (2023) Controllably constructed carbide/oxide heterointerfaces of molybdenum for efficient hydrogen evolution. Fuel, 335. 127084.

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The dependence of cathodic hydrogen evolution reaction (HER) on noble metal catalysts is a critical challenge to realizing the industrial-scale application of hydrogen production from electrochemical water splitting. Due to the excellent water dissociation catalytic ability of Mo2C and the high HER catalytic activity of MoOx, Mo2C/MoOx heterointerfaces are controllably constructed via hydrogen peroxide oxidation of Mo2C to achieve improved HER catalytic performance. On the Mo2C/MoOx heterointerface, protons generated by the Mo2C sites via water dissociation can be immediately reduced by adjacent MoOx sites via the Volmer step to promote the overall HER kinetics. As a result, the rationally designed heterointerface-rich Mo2C-O catalyst exhibits great HER activity with a low overpotential of 115 mV to deliver 10 mA/cm2 current density. Along with great activity, the Mo2C-O catalyst also exhibits satisfying stability, confirming the promising application potential of the catalyst in industrial electrolysis systems.

Item ID: 77191
Item Type: Article (Research - C1)
ISSN: 1873-7153
Keywords: Hydrogen evolution reaction, Mo2C/MoOx heterointerface, Controllable construction, Synergistic effect, Water dissociation
Copyright Information: © 2022 Elsevier Ltd. All rights reserved.
Date Deposited: 16 Jan 2023 21:38
FoR Codes: 40 ENGINEERING > 4004 Chemical engineering > 400404 Electrochemical energy storage and conversion @ 100%
SEO Codes: 17 ENERGY > 1704 Energy transformation > 170401 Fuel cells (excl. solid oxide) @ 100%
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