Carbon dots-oriented synthesis of fungus-like CoP microspheres as a bifunctional electrocatalyst for efficient overall water splitting

Abstract

The development and optimization of transition metal-based bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical for high-efficient water splitting. Herein, we propose a carbon dots-oriented strategy for fabricating nitrogen-doped carbon dots/fungus-like CoP microsphere composite on Ni foam (CoP-NCDs/NF). Owing to its unique structure and the strong interactions between carbon dots and CoP, the newly developed CoP-NCDs/NF electrode exhibits significantly enhanced HER and OER bifunctional catalytic activities, with overpotentials as low as 103 and 226 mV at a current density of 10 mA cm−2, respectively. Accordingly, the CoP-NCDs/NF displays excellent overall water splitting performance with a low cell voltage of 1.55 V at 10 mA cm−2 and great stability in a two-electrode alkaline electrolyzer. This study provides an alternative pathway on rationally designing and fabricating carbon dots-based materials for high performance water electrolysis and other energy conversion fields.

RAS ID

38812

Document Type

Journal Article

Date of Publication

2021

Volume

182

Funding Information

National Natural Science Foundation of China Shandong Provincial Natural Science Foundation Taishan Scholar Project

School

School of Engineering

Copyright

subscription content

Publisher

Elsevier

Comments

Liu, H., Liu, Z., Wang, Y., Zhang, J., Yang, Z., Hu, H., ... Wu, M. (2021). Carbon dots-oriented synthesis of fungus-like CoP microspheres as a bifunctional electrocatalyst for efficient overall water splitting. Carbon, 182, 327-334. https://doi.org/10.1016/j.carbon.2021.06.029

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Link to publisher version (DOI)

10.1016/j.carbon.2021.06.029