Facile room-temperature synthesis of cobalt sulphide for efficient oxygen evolution reaction

Zhao, Siyu, Yang, Manni, Tan, Yeshu , Brett, Dan J L, He, Guanjie and Parkin, Ivan P (2021) Facile room-temperature synthesis of cobalt sulphide for efficient oxygen evolution reaction. Multifunctional Materials, 4 (2). 025001. ISSN 2399-7532

Full content URL: https://doi.org/10.1088/2399-7532%2Fabfeb8

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Facile room-temperature synthesis of cobalt sulphide for efficient oxygen evolution reaction
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Abstract

The electrolysis of water is one of the most promising strategies to produce renewable fuels and it is important to develop an energy-conserving, low-cost and easily prepared electrocatalyst for oxygen evolution reaction (OER). In this work, Ni foam supported Co4S3 (Co4S3/NF) was fabricated by a facile one-step approach at room temperature and exhibited excellent OER performance in alkaline media. Specifically, the Co4S3/NF electrocatalysts showed a small overpotential of only 340 mV to reach a current density of 100 mA cm−2 and a Tafel slope of 71.6 mV dec−1 in alkaline media. More importantly, excellent stability was achieved under a constant current density of 100 mA cm−2 for 100 h and the OER performance of the catalyst was improved after 1400 cycles of linear sweep voltammetry tests in alkaline media. Furthermore, the underpinning mechanism of action was studied by measuring the change of valence states for different elements to elucidate the structural evolution and active species during the electrocatalytic process.

Keywords:oxygen evolution reaction (OER), Co4S3/NF electrocatalyst
Subjects:F Physical Sciences > F200 Materials Science
Divisions:College of Science > School of Chemistry
ID Code:46094
Deposited On:25 Aug 2021 09:32

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