Encapsulation of cobalt prussian blue analogue-derived ultra-small CoP nanoparticles in electrospun N-doped porous carbon nanofibers as an efficient bifunctional electrocatalyst for water splitting

被引:17
作者
Ren, Ajing [1 ]
Yu, Bo [1 ]
Huang, Minghua [1 ]
Liu, Zhicheng [1 ]
机构
[1] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
基金
中国国家自然科学基金;
关键词
Prussian blue analogue; Transition metal phosphides; Electrospun carbon nanofibers; Nanoparticles; Bifunctional electrocatalyst; OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORK; HIGH-PERFORMANCE; HYDROGEN; OER; COMPOSITES;
D O I
10.1016/j.ijhydene.2023.06.247
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Transition metal phosphides have been considered as prospective bifunctional electrocatalysts for overall water splitting due to high activity and excellent stability. In this work, we report a facile strategy for synthesizing high-dispersion cobalt Prussian blue analoguederived CoP nanoparticles that are decorated on N-doped electrospun porous carbon nanofibers (denoted as CoP@CNF). The CoP@CNF is obtained using electrospinning, subsequent carbonization, and phosphatization treatment. Due to the high conductivity, abundance of electrocatalytic active sites, and the synergistic effect between ultra-fine CoP nanoparticles and porous N-doped electrospun carbon nanofibers, the prepared CoP@CNF catalyst exhibits remarkable activity with low overpotentials (127 and 300 mV) at 10 mA cm-2, and small Tafel slopes (73.4 and 73.8 mV dec-1) for hydrogen evolution reaction and oxygen evolution reaction in alkaline electrolyte, respectively. A water electrolyzer cell fabricated by applying CoP@CNF as both anode and cathode catalysts needs 1.64 V to achieve 10 mA cm-2, and exhibits remarkably long-term stability. This work provides useful guidance for the preparation of bifunctional nanocomposite
引用
收藏
页码:490 / 502
页数:13
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