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Issue 15, 2021
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Structural dependence of electrosynthesized cobalt phosphide/black phosphorus pre-catalyst for oxygen evolution in alkaline media

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Abstract

The integration of black phosphorus (BP) with metal phosphides is known to produce high-performance electrocatalysts for oxygen evolution reduction (OER), although increased stability and prevention of the degradation of their lone pairs would be desirable improvements. In this work, cobalt phosphide (CoP)/BP heterostructures were electrochemically synthesized with a two-electrode system, where cobalt ions were generated in situ at a Co anode, and non-aggregated BP nanosheets (NSs) were exfoliated from the bulky BP cathode. With an electrolysis voltage of 30 V, the CoP/BP heterostructure exhibited a superior and stable OER performance (e.g., an overpotential of 300 mV at 10 mA cm−2, which is 41 mV lower than that obtained with a RuO2 catalyst). The CoOx formed in situ during the OER catalysis and remaining CoP synergistically contributed to the enhanced OER performance. The present strategy provides a new electrosynthetic method to prepare stable BP electrocatalysts and also further expands their electrochemical applications.

Graphical abstract: Structural dependence of electrosynthesized cobalt phosphide/black phosphorus pre-catalyst for oxygen evolution in alkaline media

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Supplementary files

Article information


Submitted
05 Jan 2021
Accepted
29 Mar 2021
First published
29 Mar 2021

This article is Open Access

Nanoscale, 2021,13, 7381-7388
Article type
Paper

Structural dependence of electrosynthesized cobalt phosphide/black phosphorus pre-catalyst for oxygen evolution in alkaline media

H. Xiao, X. Du, M. Zhao, Y. Li, T. Hu, H. Wu, J. Jia and N. Yang, Nanoscale, 2021, 13, 7381
DOI: 10.1039/D1NR00062D

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