Issue 1, 2024

Fe doping and interface engineering-induced dual electronic regulation of CoSe2/Co9S8 nanorod arrays for enhanced electrochemical oxygen evolution

Abstract

Accurately engineering the electronic configuration of electrocatalysts to enhance their electrocatalytic performance is of importance in water splitting applications. Herein, a dual electronic regulation concept through constructing Fe-incorporated CoSe2 and Fe-incorporated Co9S8 heterostructure nanorod arrays directly grown on a carbon cloth substrate (abbreviated as Fe-(CoSe2/Co9S8)@CC hereafter) is demonstrated. Owing to the synergistic effect of Fe doping and CoSe2/Co9S8 heterointerfaces, the resultant Fe-(CoSe2/Co9S8)@CC electrode exhibits an accelerated charge transfer rate, improved electrical conductivity and sufficient active sites, thereby exhibiting excellent oxygen evolution reaction (OER) performance. Specifically, the engineered Fe-(CoSe2/Co9S8)@CC electrode only requires low overpotentials of 243 and 337 mV to afford current densities of 10 and 300 mA cm−2, respectively, and shows a low Tafel slope of 44.5 mV dec−1, an ideal faradaic efficiency of nearly 100%, and prominent long-term durability in an alkaline medium. This adopted double optimization strategy provides valuable guidance for the development of low-cost and high-performance transition metal-based electrocatalysts in the energy conversion field.

Graphical abstract: Fe doping and interface engineering-induced dual electronic regulation of CoSe2/Co9S8 nanorod arrays for enhanced electrochemical oxygen evolution

Supplementary files

Article information

Article type
Research Article
Submitted
03 Oct 2023
Accepted
06 Nov 2023
First published
07 Nov 2023

Inorg. Chem. Front., 2024,11, 164-171

Fe doping and interface engineering-induced dual electronic regulation of CoSe2/Co9S8 nanorod arrays for enhanced electrochemical oxygen evolution

G. Zhou, C. Wei, Z. Li, B. He, Z. Liu and J. Li, Inorg. Chem. Front., 2024, 11, 164 DOI: 10.1039/D3QI02017G

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