Synergistically coupling of Fe-doped CoP nanocubes with CoP nanosheet arrays towards enhanced and robust oxygen evolution electrocatalysis

Deli Jiang; Shengjie Xu; Biao Quan; Chenchen Liu; Yikai Lu; Jianjun Zhu; Dan Tian; Di Li

doi:10.1016/j.jcis.2021.01.084

Synergistically coupling of Fe-doped CoP nanocubes with CoP nanosheet arrays towards enhanced and robust oxygen evolution electrocatalysis

J Colloid Interface Sci. 2021 Jun:591:67-75. doi: 10.1016/j.jcis.2021.01.084. Epub 2021 Feb 1.

Authors

Deli Jiang¹, Shengjie Xu², Biao Quan², Chenchen Liu², Yikai Lu², Jianjun Zhu², Dan Tian³, Di Li⁴

Affiliations

¹ School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China. Electronic address: dlj@ujs.edu.cn.
² School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China.
³ College of Materials Science and Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China.
⁴ Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China. Electronic address: cfbgdd@sina.com.

PMID: 33601106
DOI: 10.1016/j.jcis.2021.01.084

Abstract

The rational design of high-performance and low-cost oxygen evolution reaction (OER) electrocatalysts for water splitting is of vital importance for development of renewable hydrogen energy. Herein, we demonstrate an interfacial engineering strategy to prepare Fe-doped CoP nanocubes/CoP nanosheet arrays heterostructure supported on carbon cloth (denoted as CoFeP/CoP/CC). The resultant CoFeP/CoP/CC heterostructure catalyst possesses abundant heterogeneous interfaces, which enables the exposure of reaction active sites and possibly modulation of electronic structure of the catalyst. Furthermore, this strong interfacial coupling of CoFeP and CoP as well as the integration structure on the carbon cloth guarantee high electronic conductivity and enhanced mechanical stability. Benefiting from these advantages, the CoFeP/CoP/CC-heterostructure exhibits high electrocatalytic OER performance with a low overpotential of 240 mV for reaching a current density of 10 mA cm^-2, which outperforms the commercial noble metal RuO₂ (255 mV) and many reported TMPs-based electrocatalysts. Moreover, this CoFeP/CoP/CC catalyst shows a remarkable OER catalytic stability over 100 h. This work provides an effective avenue for the design of the high-performance OER catalyst by interfacial engineering strategy.

Keywords: Electrocatalysis; Interfacial engineering; Metal phosphides; Oxygen evolution reaction; Synergistic effect.