Heterostructured CoFeP/CoP as an Electrocatalyst for Hydrogen Evolution in Alkaline Media

Lichao Tan; Ranran He; Anran Shi; Linjiang Xue; Yimin Wang; Hongpeng Li; Xiumei Song

doi:10.1021/acs.inorgchem.3c01186

Heterostructured CoFeP/CoP as an Electrocatalyst for Hydrogen Evolution in Alkaline Media

Inorg Chem. 2023 Jun 26;62(25):9964-9970. doi: 10.1021/acs.inorgchem.3c01186. Epub 2023 Jun 12.

Authors

Lichao Tan^{1

2

3}, Ranran He³, Anran Shi³, Linjiang Xue³, Yimin Wang³, Hongpeng Li⁴, Xiumei Song¹

Affiliations

¹ Institute of Carbon Neutrality, Zhejiang Wanli University, Ningbo 315100, P. R. China.
² School of Materials Science and Engineering, State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, P. R. China.
³ School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, P. R. China.
⁴ College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, P. R. China.

PMID: 37307399
DOI: 10.1021/acs.inorgchem.3c01186

Abstract

Developing highly efficient and persistent transition-metal-phosphide (TMP)-based electrocatalysts is critical for the hydrogen evolution reaction (HER) via water splitting in alkaline media. Herein, we constructed a unique heterostructured CoFeP/CoP grown on a nickle foam (NF) via hydrothermal and dipping methods followed by phosphorization at different temperatures for HER. The experimental results exhibit that the HER activity of CoFeP/CoP-400 is accelerated after the construction of heterostructures. The unique heterostructure provides plentiful active sites and a large surface area, which are beneficial for HER in 1.0 M KOH. CoFeP/CoP-400 displays a small overpotential of 78 mV at a current density of 10 mA cm^-2 and a smaller Tafel slope of 55.5 mV dec^-1. Moreover, CoFeP/CoP-400 shows excellent stability with a long-term operating time of 12 h. This work provides an effective method for the construction of TMPs with heterostructures for promoting energy conversion.