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Universal Strategy of Iron/cobalt-based Materials for Boosted Electrocatalytic Activity of Water Oxidation by Weixia Huang; Yun Tong; Dongmei Feng; Pengzuo Chen is a Chemistry article available to read on EtoBox.

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Low-dimensional cobalt-based materials have proved to be one of the promising catalytic systems for oxygen-evolution reaction (OER). How to develop a facile and universal strategy for significantly improving their catalytic performance is of great significance, but still faces great challenges. Herein, a series of cobalt-based nanowires (CoS, CoP, CoF and CoO) are synthesized and used as conceptual examples to explore the universality to enhance their OER catalytic activity. The FeOOH-modified cobalt-based electrocatalysts exhibit significantly improved OER catalytic performance compared to the pristine samples. Especially, the optimal CoS@FeOOH material delivers the smallest overpotential of 260 mV at 100 mA cm, which outperforms most of the reported excellent materials. Notably, the CoP||CoP@FeOOH electrolyzer (1.63 V@30 mA cm) delivers higher performance than the CoS||CoS@FeOOH electrolyzer (1.72 V@30 mA cm) benefiting from the better HER catalytic activity of CoP. In addition, the post-characterizations confirm that the real catalytic structure of those electrocatalysts consists of a surface CoOOH@FeOOH catalytic layer and cobalt-based nanowire core. The Co-Fe catalytic layer p

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Author

Weixia Huang; Yun Tong; Dongmei Feng; Pengzuo Chen

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Chemistry (Physical Sciences)