Issue 14, 2023

Core–shell Fe3O4@CoFe2O4 nanoparticles as high-performance anode catalysts for enhanced oxygen evolution reaction

Abstract

Water electrolysis is a promising and environmentally friendly means for renewable energy storage. Recent progress in the development of anion exchange membranes (AEMs) has provided new perspectives for high-performance anode catalysts based on transition metal oxides (TMOs) for the sluggish anodic oxygen evolution reaction (OER). Here, we report on core–shell nanoparticles (Fe3O4@CoFe2O4) which allow combining an electrocatalytic shell (CoFe2O4) with a conductive core (Fe3O4). Such an original approach significantly minimizes critical Co content in the catalyst and avoids addition of unstable conductive carbon black. The core–shell nanoparticles outperform Co(1−x)Fe(2+x)O4 nanoparticles and show an exceptional OER activity per Co unit mass (2800 A gcobalt−1 at 1.65 V vs. RHE) suggesting synergistic interaction between the core and the shell. Along with the core–shell structure, the size of the Fe3O4 core is a critical parameter, with a large conductive Fe3O4 core being beneficial for OER enhancement.

Graphical abstract: Core–shell Fe3O4@CoFe2O4 nanoparticles as high-performance anode catalysts for enhanced oxygen evolution reaction

Supplementary files

Article information

Article type
Communication
Submitted
02 Feb 2023
Accepted
05 Jun 2023
First published
14 Jun 2023
This article is Open Access
Creative Commons BY-NC license

Sustainable Energy Fuels, 2023,7, 3239-3243

Core–shell Fe3O4@CoFe2O4 nanoparticles as high-performance anode catalysts for enhanced oxygen evolution reaction

L. Royer, I. Makarchuk, S. Hettler, R. Arenal, T. Asset, B. Rotonnelli, A. Bonnefont, E. Savinova and B. P. Pichon, Sustainable Energy Fuels, 2023, 7, 3239 DOI: 10.1039/D3SE00130J

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