Issue 18, 2025

Heterostructure and atomic doping engineering in 3D Co2CrO4@Cr-NiFe LDH/CF nanosheet arrays for efficient electrocatalytic oxygen evolution

Abstract

The oxygen evolution reaction (OER) is usually considered a major obstacle to electrochemical water splitting, primarily because of its sluggish kinetics. Developing an effective and durable catalyst for the OER is indispensable for overcoming this challenge. In this study, a three-dimensional nanomaterial with a unique heterostructure (Co2CrO4@Cr-NiFe LDH/CF) was obtained by the deposition of Cr-doped double hydroxide (Cr-NiFe LDH) on Co2CrO4 nanosheet arrays grown on copper foam (Co2CrO4/CF). In particular, the catalyst had a current density of 100 mA cm−2 at a low overpotential of just 257 mV, a high turnover frequency (TOF) of 10.21 s−1 at an overpotential of 300 mV and a Tafel slope of merely 72 mV dec−1. This indicated that Co2CrO4@Cr-NiFe LDH/CF exhibited outstanding catalytic efficiency. Moreover, the catalyst exhibited stability for a duration of 40 h at a current density of 100 mA cm−2. The study introduces an innovative approach for the superior design of an OER catalyst and offers a significant reference for investigation within the realm of renewable energy.

Graphical abstract: Heterostructure and atomic doping engineering in 3D Co2CrO4@Cr-NiFe LDH/CF nanosheet arrays for efficient electrocatalytic oxygen evolution

Supplementary files

Article information

Article type
Paper
Submitted
14 Feb 2025
Accepted
01 Apr 2025
First published
14 Apr 2025

Dalton Trans., 2025,54, 7458-7464

Heterostructure and atomic doping engineering in 3D Co2CrO4@Cr-NiFe LDH/CF nanosheet arrays for efficient electrocatalytic oxygen evolution

X. Yao, Q. Wang, X. Liu, X. Kuang, X. Sun, X. Ren, D. Wu and Q. Wei, Dalton Trans., 2025, 54, 7458 DOI: 10.1039/D5DT00351B

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