Amorphous CoV Phosphate Nanosheets as Efficient Oxygen Evolution Electrocatalyst

Yuming Dong; Tao Zhao; Dazhong Zhong; Guang Liu; Genyan Hao; Jinping Li; Qiang Zhao

doi:10.1002/asia.202200126

Amorphous CoV Phosphate Nanosheets as Efficient Oxygen Evolution Electrocatalyst

Chem Asian J. 2022 May 16;17(10):e202200126. doi: 10.1002/asia.202200126. Epub 2022 Apr 5.

Authors

Yuming Dong^{1

2}, Tao Zhao^{1

2}, Dazhong Zhong^{1

2}, Guang Liu^{1

2}, Genyan Hao^{1

2}, Jinping Li^{1

2}, Qiang Zhao^{1

2}

Affiliations

¹ College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, P.R. China.
² Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan, 030024, Shanxi, P.R. China.

PMID: 35293701
DOI: 10.1002/asia.202200126

Abstract

The oxygen evolution reaction (OER) is crucial for hydrogen production. However, OER with four-electron transfer requires electrocatalysts to speed up its sluggish kinetics in alkaline solutions. Herein, amorphous CoV phosphate (denoted as CoV-Pi) nanosheets synthesized by a straightforward one-step hydrothermal approach is reported, which provide a low overpotential of 320 mV at 10 mA cm^-2 , a small Tafel slope down to 48.8 mV dec^-1 and long-term durability over 80 h. The efficient activity is ascribed to the amorphous nanosheets structure, high electrochemically active surface area, enhanced surface wettability and the synergistic effect of the active metal atoms. This study significantly indicates that CoV-Pi is a promising alternative to replace expensive noble metal-based catalysts for electrochemical water splitting.

Keywords: Amorphous materials; Nanostructures; Phosphorylation; Vanadium; Water splitting.

Abstract

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