Journal article

Regulating the charge diffusion of two-dimensional cobalt-iron hydroxide/graphene composites for high-rate water oxidation

Tang Tang, Wen-Jie Jiang, Lu-Pan Yuan, Shuai Niu, Jin-Song Hu, Li-jun Wan

JOURNAL OF MATERIALS CHEMISTRY A | ROYAL SOC CHEMISTRY | Published : 2020

Abstract

Although the significance of charge diffusion has been recognized in many high-performance energy devices, it has received very less attention in the design of electrocatalysts for the oxygen evolution reaction (OER), which is particularly crucial for highly active but less conductive OER electrocatalysts, such as two-dimensional metal hydroxides (MHs) with anisotropic conductivity. Herein, we report the elaborate design of a series of CoFe hydroxide nanosheets on graphene (CFH@G) composites to demonstrate the importance of charge diffusion regulation in improving the OER activity of MHs. It was discovered that the few-layer-thick CFH nanosheets lying on the graphene substrate provided an ef..

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University of Melbourne Researchers

Grants

Awarded by National Key Research and Development Program of China


Awarded by National Natural Science Foundation of China


Funding Acknowledgements

We acknowledge the financial support from the National Key Research and Development Program of China (2016YFB0101202), the National Natural Science Foundation of China (21773263, 21902162, 21972147, and 21703257). We also thank the following staff scientists at the Centre for Analysis and Testing, ICCAS for their help: Y. Sun for XRD analysis, Dr Z.-J. Zhao and X.-Y. Zhang for XPS analysis, Dr B. Guan, and J.-L. Yue for SEM and TEM supports.