Issue 2, 2024

Co-Prussian blue analogue supported on graphene-based materials as an electrocatalyst for OER at neutral pH

Abstract

The development of efficient, robust, and low-cost electrocatalysts for the oxygen evolution reaction (OER) under mild conditions is a sustainable pathway for energy conversion and storage technologies. Cobalt Prussian blue analogue (Co-PBA) has been emerging as a potential candidate to be engineered and match such requirements. In this study, the catalytic activity performance of Co-PBA was improved by depositing over different types of graphene-based materials that act as supports, resulting in hybrid composites. The Co-PBA + r_GO N2, which is Co-PBA deposited over a reduced graphene oxide doped with N atoms (urea as N source), showed the best OER catalytic improvements in a neutral medium (0.5 mol L−1 KNO3), reducing the overpotential in 54 mV and 137 mV to reach current densities of 10 (J10) and 50 (J50) mA cm−2, respectively, in comparison to the sole electrocatalyst Co-PBA. These results indicate that the interaction between the Co-PBA and graphene-based supports plays a pivotal role in effectively enhancing the OER activity of the electrocatalyst.

Graphical abstract: Co-Prussian blue analogue supported on graphene-based materials as an electrocatalyst for OER at neutral pH

Supplementary files

Article information

Article type
Paper
Submitted
29 Sep 2023
Accepted
25 Dec 2023
First published
26 Dec 2023
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2024,3, 495-503

Co-Prussian blue analogue supported on graphene-based materials as an electrocatalyst for OER at neutral pH

R. G. Yoshimura, T. V. de B. Ferraz, P. J. Zambiazi and J. A. Bonacin, Energy Adv., 2024, 3, 495 DOI: 10.1039/D3YA00483J

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