Issue 34, 2023

Crystalline/amorphous composite interface of CoP@Ni/Fe–P as a boosted electrocatalyst for full water splitting

Abstract

Heterojunction materials have become good candidates for electrocatalysts thanks to their unique physicochemical merits. Herein, a crystalline–amorphous CoP@Ni/Fe–P heterojunction is constructed for whole water splitting. Originating from the strong electronic reaction at the amorphous–crystal interfaces, the electron density of Co, Ni, Fe and P is adjusted, which will optimize the adsorption and desorption energy of intermediates for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) and lower the kinetic barrier. The CoP@Ni/Fe–P heterojunction displays overpotentials of 125 and 250 mV to drive a current density of 10 mA cm−2 in 1 M KOH. In addition, the whole water splitting performance requires a cell voltage of 1.56 V to deliver 10 mA cm−2 and shows good stability. This work provides a way to design and prepare transition-metal-based materials with good electrocatalytic activity by constructing a crystalline and amorphous heterojunction.

Graphical abstract: Crystalline/amorphous composite interface of CoP@Ni/Fe–P as a boosted electrocatalyst for full water splitting

Supplementary files

Article information

Article type
Paper
Submitted
07 Jun 2023
Accepted
18 Jul 2023
First published
03 Aug 2023

Dalton Trans., 2023,52, 11941-11948

Crystalline/amorphous composite interface of CoP@Ni/Fe–P as a boosted electrocatalyst for full water splitting

L. Yu, P. Wu, T. Tian, X. He, M. Fan and L. Cui, Dalton Trans., 2023, 52, 11941 DOI: 10.1039/D3DT01745A

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