Facile Electrochemical Synthesis of Bifunctional Needle-like Co-P Nanoarray for Efficient Overall Water Splitting
Xiong He,
Jiayang Cai,
Jie Zhou,
Qiyi Chen,
Qijun Zhong,
Jinghua Liu,
Zijun Sun,
Dezhi Qu,
Yudong Li
Affiliations
Xiong He
Liuzhou Key Laboratory of New Energy Vehicle Power Lithium Battery, School of Electronic Engineering, Guangxi Engineering Research Center for Characteristic Metallic Powder Materials, Guangxi University of Science and Technology, Liuzhou 545000, China
Jiayang Cai
Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
Jie Zhou
Liuzhou Key Laboratory of New Energy Vehicle Power Lithium Battery, School of Electronic Engineering, Guangxi Engineering Research Center for Characteristic Metallic Powder Materials, Guangxi University of Science and Technology, Liuzhou 545000, China
Qiyi Chen
Liuzhou Key Laboratory of New Energy Vehicle Power Lithium Battery, School of Electronic Engineering, Guangxi Engineering Research Center for Characteristic Metallic Powder Materials, Guangxi University of Science and Technology, Liuzhou 545000, China
Qijun Zhong
Liuzhou Key Laboratory of New Energy Vehicle Power Lithium Battery, School of Electronic Engineering, Guangxi Engineering Research Center for Characteristic Metallic Powder Materials, Guangxi University of Science and Technology, Liuzhou 545000, China
Jinghua Liu
Liuzhou Key Laboratory of New Energy Vehicle Power Lithium Battery, School of Electronic Engineering, Guangxi Engineering Research Center for Characteristic Metallic Powder Materials, Guangxi University of Science and Technology, Liuzhou 545000, China
Zijun Sun
Liuzhou Key Laboratory of New Energy Vehicle Power Lithium Battery, School of Electronic Engineering, Guangxi Engineering Research Center for Characteristic Metallic Powder Materials, Guangxi University of Science and Technology, Liuzhou 545000, China
Dezhi Qu
Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
Yudong Li
Key Laboratory of Bio-Based Material Science & Technology, Northeast Forestry University, Harbin 150090, China
The development of low-cost and high-performance bifunctional electrocatalysts for overall water splitting is still challenging. Herein, we employed a facile electrodeposition method to prepare bifunctional cobalt phosphide for overall water splitting. The needle-like cobalt phosphide (Co-P-1) nanoarray is uniformly distributed on nickel foam. Co-P-1 exhibits excellent electrocatalytic activity for hydrogen evolution reaction (HER, 85 mV at 10 mA/cm2, 60 mV/dec) and oxygen evolution reaction (OER, 294 mV at 50 mA/cm2, 60 mV/dec). The cell-voltage of 1.60 V is found to achieve the current density of 10 mA/cm2 for overall water splitting in the two-electrode system, comparable to that of previously reported Pt/C/NF||RuO2/NF. The excellent electrocatalytic performance can be attributed to the needle-like structure with more active sites, accelerated charge transfer and evolved bubbles’ release. This work can provide new approach to the development of a bifunctional electrocatalyst for overall water splitting.
