Polyvinyl alcohol protected Mo2C/Mo2N multicomponent electrocatalysts with controlled morphology for hydrogen evolution reaction in acid and alkaline medium

被引：45

作者：

Chen, Xiaozhen ^{[1
]}

Qi, Ji ^{[1
]}

Wang, Pan ^{[1
]}

Li, Chuang ^{[1
]}

Chen, Xiao ^{[1
]}

Liang, Changhai ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Chem Engn, Lab Adv Mat & Catalyt Engn, Dalian 116024, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2018年 / 273卷

基金：

中国国家自然科学基金;

关键词：

Molybdenum carbide; Molybdenum nitride; Polyvinyl alcohol; Controlled morphology; Hydrogen evolution reaction; MOLYBDENUM CARBIDE NANOPARTICLES; EFFICIENT ELECTROCATALYST; CARBON NANOTUBES; ASSISTED SYNTHESIS; FUEL-CELLS; CATALYSTS; PERFORMANCE; COMPOSITES; MO2C; NANOSHEETS;

D O I：

10.1016/j.electacta.2018.04.033

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Herein, PVA-Mo2C/Mo2N nanospheres with surface roughness are synthesized via a polyvinyl alcohol (PVA) involved approach and used for hydrogen evolution reaction (HER). The average crystallite size of the PVA protected nMo(2)CN nanospheres (6.1 nm) is one third of that of the PVA-Mo2C/Mo2N without PVA protection (17.9 nm). At 10 mAcm(-2) current density, the as-synthesized PVA-Mo2C/Mo2N nanospheres with surface roughness exhibit HER overpotentials of 132 mV and 142 mV with corresponding Tafel slope of 51.8 mV dec(-1) and 50.4 mV dec(-1) in acid and alkaline medium, respectively. This high apparent activity can be attributed to the high intrinsic activity originated from the adjacent surface active sites of Mo2C and Mo2N as well as the large ECSA of PVA-Mo2C/Mo2N nanospheres with surface roughness. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：239 / 247

页数：9

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