首页|Cu/Mo2C synthesized through Anderson-type polyoxometalates modulate interfacial water structure to achieve hydrogen evolution at high current density

Cu/Mo2C synthesized through Anderson-type polyoxometalates modulate interfacial water structure to achieve hydrogen evolution at high current density

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The development of efficient non-precious metal catalysts is important for the large-scale application of alkaline hydrogen evolution reaction(HER).Here,we synthesized a composite catalyst of Cu and Mo2C(Cu/Mo2C)using Anderson-type polyoxometalates(POMs)synthesized by the facile soaking method as precursors.The electronic interaction between Cu and Mo2C drives the positive charge of Cu,alleviating the strong adsorption of hydrogen at the Mo site by modulating the d-band center of Mo2C.By studying the interfacial water structure using in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS),we determined that the positively charged Cu crystals have the function of activating water molecules and optimizing the interfacial water structure.The interfacial water of Cu/Mo2C contains a large amount of free water,which could facilitate the transport of reaction intermediates.Due to activated water molecules and optimized interfacial water structure and hydrogen adsorption energy,the overpotential of Cu/Mo2C is 24 mV at a current density of 10 mA·cm-2 and 178 mV at a current density of 1000 mA·cm-2.This work improves catalyst performance in terms of interfacial water structure optimization and deepens the understanding of water-mediated catalysis.

electrocatalytic hydrogen productioninterfacial watercharge transportd band centerin situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS)

Dunyuan Jin、Fen Qiao、Yan Zhou、Junfeng Wang、Kecheng Cao、Jing Yang、Jikang Zhao、Lei Zhou、Haitao Li

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School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China

School of Physical Science and Technology and Shanghai Key Laboratory of High-resolution Electron Microscopy,ShanghaiTech University,Shanghai 201210,China

Institute for Energy Research,Jiangsu University,Zhenjiang 212013,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of China

5237606051976081

2024

10.1007/s12274-023-6237-6

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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