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Dynamically controlled growth of Cu–Mo–O nanosheets for efficient electrocatalytic hydrogen evolution

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Abstract

The development of low-dimensional non-precious metal catalysts for the hydrogen evolution reaction (HER) is highly desired for clean energy utilization. Herein, we have reported a facile synthesis protocol of Cu–Mo–O (CMO) nanowires and nanosheets on Cu foam (CMOW/CF and CMOS/CF) through a one-step reaction of Cu nanowires with (NH4)6Mo7O24 solution directly under mild conditions. The final product morphology has been tuned by mechanical stirring. The as-synthesized CMOS/CF exhibits a low operating overpotential of 112 mV at a current density of 10 mA cm−2 with a high electrochemical active area of 25.1 mF cm−2 and excellent long-term stability in the 1 M KOH electrolyte. Moreover, by using the CMOS/CF as cathodic and anodic electocatalysts, a two-electrode electrolyzer capable of driving 10 mA cm−2 at a cell voltage of 1.69 V was achieved, along with promising stability. The high performance of the CMOS/CF can be attributed to higher electrochemical area and more Mo catalytic sites induced by mechanical stirring. This work provides a facile method for the synthesis and catalytic site regulation through a simple method of low-dimensional nanomaterials for the HER with relatively high electrochemical active area and catalytic activity.

Graphical abstract: Dynamically controlled growth of Cu–Mo–O nanosheets for efficient electrocatalytic hydrogen evolution

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Supplementary files

Article information


Submitted
11 Dec 2019
Accepted
08 Jun 2020
First published
09 Jun 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Dynamically controlled growth of Cu–Mo–O nanosheets for efficient electrocatalytic hydrogen evolution

A. Wang, L. Zhao, H. Liu, Z. Zhou, C. Li, Y. Xiang, W. Zhou and F. Hao, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC06769H

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