Issue 19, 2024

Boosting the oxygen evolution reaction via the reconstruction of an M(OH)x/Fe3O4 catalyst

Abstract

For large-scale hydrogen production from electrocatalysis of water, Ni- and/or Fe-based catalysts were commonly used but were limited by the ultrahigh overpotential and poor stability at a high current density (>500 mA cm−2). Here, the reconstruction of M(OH)x/Fe3O4 (M = Ni, Fe) arrays has been performed for boosting the oxygen evolution reaction (OER). The prepared M(OH)x/Fe3O4 grown on iron foam (M(OH)x/Fe3O4/IF) catalysts exhibited low overpotentials of 214 and 311 mV for the OER at current densities of 50 and 500 mA cm−2, respectively. In addition, an excellent stability up to 70 h of operation was achieved at a current density of 10 mA cm−2 in 1 M KOH. The in situ Raman spectra revealed that the reconstruction of M(OH)x/Fe3O4/IF boosted the OER activity. Theoretical calculations revealed favorable absorption of O2 at the Ni site of M(OH)x/Fe3O4/IF during the OER. This work highlights the reconstruction of structurally definite catalysts for promoting the catalytic activity toward the OER and the large-scale electrocatalysis of water.

Graphical abstract: Boosting the oxygen evolution reaction via the reconstruction of an M(OH)x/Fe3O4 catalyst

Supplementary files

Article information

Article type
Research Article
Submitted
22 iyn 2024
Accepted
03 avq 2024
First published
06 avq 2024

Inorg. Chem. Front., 2024,11, 6333-6342

Boosting the oxygen evolution reaction via the reconstruction of an M(OH)x/Fe3O4 catalyst

X. Wang, L. Wang, Y. Liu, R. Devasenathipathy, L. Liu, Q. Huang, D. Huang, Y. Fan, D. Chen and W. Chen, Inorg. Chem. Front., 2024, 11, 6333 DOI: 10.1039/D4QI01574F

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