Xiao He, Du Xiaoling, Zhao Man, Li Ya, Hu Tianjun, Wu Haishun, Jia Jianfeng, Yang Nianjun
Key Laboratory of Magnetic Molecules & Magnetic Information Materials, Ministry of Education, The School of Chemical and Material Science, Shanxi Normal University, Linfen 041004, China.
Nanoscale. 2021 Apr 21;13(15):7381-7388. doi: 10.1039/d1nr00062d. Epub 2021 Apr 13.
The integration of black phosphorus (BP) with metal phosphides is known to produce high-performance electrocatalysts for oxygen evolution reduction (OER), although increased stability and prevention of the degradation of their lone pairs would be desirable improvements. In this work, cobalt phosphide (CoP)/BP heterostructures were electrochemically synthesized with a two-electrode system, where cobalt ions were generated in situ at a Co anode, and non-aggregated BP nanosheets (NSs) were exfoliated from the bulky BP cathode. With an electrolysis voltage of 30 V, the CoP/BP heterostructure exhibited a superior and stable OER performance (e.g., an overpotential of 300 mV at 10 mA cm, which is 41 mV lower than that obtained with a RuO catalyst). The CoO formed in situ during the OER catalysis and remaining CoP synergistically contributed to the enhanced OER performance. The present strategy provides a new electrosynthetic method to prepare stable BP electrocatalysts and also further expands their electrochemical applications.
尽管提高稳定性并防止孤对电子降解是理想的改进，但已知黑磷（BP）与金属磷化物的整合可制备出用于析氧还原（OER）的高性能电催化剂。在这项工作中，采用双电极系统电化学合成了磷化钴（CoP）/BP异质结构，其中钴离子在Co阳极原位生成，非聚集的BP纳米片（NSs）从块状BP阴极剥落。在30 V的电解电压下，CoP/BP异质结构表现出优异且稳定的OER性能（例如，在10 mA cm时过电位为300 mV，比RuO催化剂低41 mV）。OER催化过程中原位形成的CoO和剩余的CoP协同促进了OER性能的提高。本策略提供了一种制备稳定BP电催化剂的新电合成方法，也进一步扩展了其电化学应用。
