MOF-derived cobalt–nickel phosphide nanoboxes as electrocatalysts for the hydrogen evolution reaction
Yidong Lu a, Yaoyao Deng b, Shuanglong Lu c, Yayuan Liu a, Jianping Lang d, Xueqin Cao*a（曹雪琴） and Hongwei Gu *a（顾宏伟）
a Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China.
b School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou 213032, P.R. China.
c Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, P. R. China.
d College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
Nanoscale, 2019, 11, 21259--21265
The development of high-efficiency nonprecious electrocatalysts based on inexpensive and Earth abundant elements is of great significance for renewable energy technologies. Group VIII transition metal phosphides (TMPs) gradually stand out due to their intriguing properties including low resistance and superior catalytic activity and stability. Herein, we adopt a unique MOF-derived strategy to synthesize transition metal phosphide nanoboxes which can be employed as electrocatalysts for the hydrogen evolution reaction. During this process, we converted a Co-MOF to a CoNi-MOF by ion exchange and low-temperature phosphating to achieve CoNiP nanoboxes. The CoNiP nanoboxes can reach a current density of 10 mA cm−2 at a low overpotential of 138 mV with a small Tafel slope of 65 mV dec−1.