Large-scale printing synthesis of transition metal phosphides encapsulated in N, P co-doped carbon as highly efficient hydrogen evolution cathodes

被引:80
作者
Xiao, Jian [1 ]
Zhang, Zheye [1 ]
Zhang, Yan [1 ]
Lv, Qiying [1 ]
Jing, Feng [1 ]
Chi, Kai [1 ]
Wang, Shuai [1 ,2 ]
机构
[1] Huazhong Univ Sci & Technol, State Key Lab Digital Mfg Equipment & Technol, Key Lab Mat Chem Energy Convers & Storage, Minist Educ,Sch Chem & Chem Engn, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, FERC, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Electrocatalysis; Hydrogen evolution reaction; Transition metal phosphide; Ionic liquid; N; P co-doped carbon; Inkjet printing; ACTIVE EDGE SITES; MOLYBDENUM PHOSPHIDE; BIFUNCTIONAL CATALYSTS; GENERATING HYDROGEN; N; P-CODOPED CARBON; NANOSHEET ARRAYS; OXYGEN EVOLUTION; NANOWIRE ARRAYS; NICKEL FOAM; WATER;
D O I
10.1016/j.nanoen.2018.06.040
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
The large-scale synthesis accompanying structural modulation of efficient noble-metal-free catalysts with facile kinetics for the hydrogen evolution reaction (HER) is still a big challenge for electrolytic water splitting. Herein, we report a simple inkjet printing technology for the large-scale synthesis of a series of transition metal phosphide (TMP) nanoparticles encapsulated in N, P co-doped carbon supported on carbon fiber cloth (CF@NPC-TMP, TM = Mo, Co, Ni, Fe) as highly efficient hydrogen evolution cathodes using ionic liquids as phosphorus and carbon sources. The in-situ carbon nanolayers derived from ionic liquids not only expose abundant catalytically active sites and allow rapid electron transport to the catalytically active sites during HER but also effectively prevent the TMP nanoparticles from corroding to enhance their stability. All the as-prepared CF@NPC-TMP electrodes show ideal electrocatalytic performance for HER. Especially, the CF@NPC-MoP electrode only requires overpotentials of 87 and 145 mV to drive cathodic current densities of 10 and 100 mA cm(-2) in 0.5M H2SO4, respectively. In addition, this electrode continuously operates at a constant current density of 10 mA cm(-2) for 20 h with negligible rise in operating potential. The resultant CF@NPC-TMP electrodes also show ideal electrocatalytic activities toward HER in alkaline and neutral media. Hence, the synthesis strategy developed in this study may spark interest in research on TMP-based nanomaterials for various applications.
引用
收藏
页码:223 / 230
页数:8
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