Induction of Co 2 P Growth on a MXene (Ti 3 C 2 T x )-Modified Self-Supporting Electrode for Efficient Overall Water Splitting

It still is a challenge to create a superior and easily coupled bifunctional electrocatalyst for water splitting impelled by a low voltage. In this work, the controlled growth of Co P NAs on the surface of a MXene (Ti C T )-modified self-supporting electrode is demonstrated as a competent and reliab...

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Published in:The journal of physical chemistry letters 2021-05, Vol.12 (20), p.4841-4848
Main Authors: Lv, Zepeng, Ma, Wansen, Dang, Jie, Wang, Meng, Jian, Kailiang, Liu, Dong, Huang, Dejun
Format: Article
Language:English
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Summary:It still is a challenge to create a superior and easily coupled bifunctional electrocatalyst for water splitting impelled by a low voltage. In this work, the controlled growth of Co P NAs on the surface of a MXene (Ti C T )-modified self-supporting electrode is demonstrated as a competent and reliable bifunctional electrocatalyst for efficient water splitting. The heterointerface in Co P@Ti C T with an optimized adsorption free energy of H*, H O, and better conductivity can give enhanced HER (hydrogen evolution reaction) activity, with a low overpotential (42 mV) at 10 mA cm . Additionally, the OER (oxygen evolution reaction) activity has also been similarly strengthened by the synergy of Co P and MXene with an overpotential of 267 mV to arrive at 10 mA cm . Furthermore, the excellent bifunctional electrode (Co P@Ti C T ∥Co P@Ti C T ) exhibits efficient engineering water-splitting performance (1.46 V@10 mA cm ) in alkaline solution. This simple design can propose a promising approach to exploit precious-metal-free catalysts for energy conversion.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.1c01345