论文成果
Polyvinyl alcohol protected Mo2C/Mo2N multicomponent electrocatalysts with controlled morphology for hydrogen evolution reaction in acid and alkaline medium
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- 论文类型：期刊论文
- 发表时间：2018-05-20
- 发表刊物：ELECTROCHIMICA ACTA
- 收录刊物：SCIE、EI
- 文献类型：J
- 卷号：273
- 页面范围：239-247
- ISSN号：0013-4686
- 关键字：Molybdenum carbide; Molybdenum nitride; Polyvinyl alcohol; Controlled
morphology; Hydrogen evolution reaction
- 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.
