Citation: Jintang Li, Guiqing Du, Xian Cheng, Pingjing Feng, Xuetao Luo. CoNiP/NC polyhedrons derived from cobalt-based zeolitic imidazolate frameworks as an active electrocatalyst for oxygen evolution[J]. Chinese Journal of Catalysis, ;2018, 39(5): 982-987. doi: 10.1016/S1872-2067(18)63030-X shu

CoNiP/NC polyhedrons derived from cobalt-based zeolitic imidazolate frameworks as an active electrocatalyst for oxygen evolution

Fujian Key Laboratory of Advanced Materials, College of Materials, Xiamen University, Xiamen 361005, Fujian, China

Received Date: 19 December 2017
Revised Date: 21 January 2018

Fund Project: This work was supported by National Natural Science Foundation of China (51204143, 51334004) and the Scientific and Technological Innovation Platform of Fujian Province (2006L2003).

The oxygen evolution reaction (OER) plays an important role in the development of energy conversation and storage technologies including water splitting and metal-air batteries, where the development of electrocatalysts is paramount. In this study, cobalt-nickel phosphide/N-doped porous carbon polyhedron electrocatalysts (CoNiP/NC) were prepared by a facile two-step carbonization method and subsequent phosphorization calcination in an Ar atmosphere using cobalt-based zeolitic imidazolate frameworks (ZIFs) as precursors. Among the electrocatalysts obtained by controlling the carbonization and phosphorization temperature, the CoNiP/NC700 catalyst, where 700 refers to the calcination temperature (℃), exhibited superior electrocatalytic activity for the OER with an onset overpotential of approximate 220 mV and an overpotential of approximate 300 mV in alkaline solution at a current density of 10 mA/cm². The CoNi/NC and Co/NC Samples were also tested for comparison and CoNiP/NC exhibited the better electrocatalytic activity at all the temperatures tested. The superior electrocatalytic activity of the phosphorization hybrid material can be attributed to the superior synergistic effect of Co, Ni, P and C due to their strong electron coupling interactions. The interconnected amorphous carbon anchored the active Co compounds to avoid aggregation and maintained conducting channels for electron transfer. The composite electrocatalyst prepared herein is a promising candidate for use in electrocatalytic OERs.
- ZIF-67,
- Carbonization,
- Phosphorization,
- Electrocatalyst,
- Oxygen evolution reaction
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