Wang Fan, Tian Rui, Guo Xingzhong, Hou Yang, Zou Chang, Yang Hui
State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China.
Nanomaterials (Basel). 2022 Apr 4;12(7):1205. doi: 10.3390/nano12071205.
High-efficiency, good electrical conductivity and excellent performance electrocatalysts are attracting growing attention in the field of overall water splitting. In order to achieve the desirable qualities, rational construction of the structure and chemical composition of electrocatalysts is of fundamental importance. Herein, petal-like structure NiCoP shells grown on conductive silver nanowires (Ag NWs) cores as bifunctional electrocatalysts for overall water splitting were synthesized through a facile hydrothermal method and phosphorization. The resultant three-dimensional core-shell petal-like structure Ag NWs@NiCoP possesses excellent catalytic activities in alkaline conditions with the overpotential of 259 mV for the oxygen evolution reaction (OER), 121 mV for the hydrogen evolution reaction (HER) and a full cell voltage of 1.64 V to reach the current density of 10 mA cm. Highly conductive Ag NWs as cores and high surface area petal-like NiCoP as shells can endow outstanding catalytic performance for the bifunctional electrocatalyst. Thus, the synthetic strategy of the three-dimensional core-shell structure Ag NWs@NiCoP considerably advances the practice of Ag NWs toward electrocatalysts.
高效、良好的导电性和优异性能的电催化剂在全水分解领域正吸引着越来越多的关注。为了实现理想的性能，合理构建电催化剂的结构和化学成分至关重要。在此，通过简便的水热法和磷化反应，合成了生长在导电银纳米线（Ag NWs）核上的花瓣状结构NiCoP壳层作为用于全水分解的双功能电催化剂。所得的三维核壳花瓣状结构Ag NWs@NiCoP在碱性条件下具有优异的催化活性，析氧反应（OER）的过电位为259 mV，析氢反应（HER）的过电位为121 mV，全电池电压为1.64 V时可达到10 mA cm的电流密度。以高导电性的Ag NWs为核，高比表面积的花瓣状NiCoP为壳，可以赋予双功能电催化剂出色的催化性能。因此，三维核壳结构Ag NWs@NiCoP的合成策略极大地推动了Ag NWs在电催化剂方面的应用。
