In-situ Formation of Amorphous Co-Al-P Layer on CoAl Layered Double Hydroxide Nanoarray as Neutral Electrocatalysts for Hydrogen Evolution Reaction

Wanqing Teng; Zhaomei Sun; Junfeng Xie; Ziqiang Wang; Xiangjiang Zheng; Bo Tang

doi:10.3389/fchem.2020.552795

In-situ Formation of Amorphous Co-Al-P Layer on CoAl Layered Double Hydroxide Nanoarray as Neutral Electrocatalysts for Hydrogen Evolution Reaction

Front Chem. 2020 Oct 22:8:552795. doi: 10.3389/fchem.2020.552795. eCollection 2020.

Authors

Wanqing Teng¹, Zhaomei Sun^{1

2}, Junfeng Xie², Ziqiang Wang³, Xiangjiang Zheng¹, Bo Tang²

Affiliations

¹ Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, China.
² Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China.
³ College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China.

Abstract

Exploration of high-efficiency and inexpensive electrode catalysts is of vital importance for the hydrogen evolution reaction (HER). In this research, an amorphous Co-Al-P layer was constructed on the surface of CoAl layered double hydroxide (CoAl-LDH) via an in-situ wet phosphidation strategy. The core-shell CoAl-LDH@Co-Al-P on Ti mesh (CoAl-LDH@Co-Al-P/TM) as an active HER electrocatalyst demands an overpotential of 150 mV to achieve a current density of 10 mA cm^-2 at neutral pH. Moreover, CoAl-LDH@Co-Al-P/TM also exhibits good electrochemical stability and a superior Faradic efficiency of nearly 100%.

Keywords: electrocatalysts; hydrogen evolution reaction; nanoarray; neutral pH; phosphide.