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作者:

Fan, Xiujun (Fan, Xiujun.) | Zhou, Haiqing (Zhou, Haiqing.) | Guo, Xia (Guo, Xia.) (学者:郭霞)

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摘要:

Single nanocrystalline tungsten carbide (WC) was first synthesized on the tips of vertically aligned carbon nanotubes (VA-CNTs) with a hot filament chemical vapor deposition (HF-CVD) method through the directly reaction of tungsten metal with carbon source. The VA-CNTs with preservation of vertical structure integrity and alignment play an important role to support the nanocrystalline WC growth. With the high crystallinity, small size, and uniform distribution of WC particles on the carbon support, the formed WC CNTs material exhibited an excellent catalytic activity for hydrogen evolution reaction (HER), giving a eta(10) (the overpotential for driving a current of 10 mA cm(-2)) of 145 mV, onset potential of 15 mV, exchange current density@ 300 mV of 117.6 mV and Tafel slope values of 72 mV dec(-1) in acid solution, and eta(10) of 137 mV, onset potential of 16 mV, exchange current density@ 300 mV of 33.1 mV and Tafel slope values of 106 mV dec(-1) in alkaline media, respectively. Electrochemical stability test further confirms the long-term operation of the catalyst in both acidic and alkaline media.

关键词:

hydrogen evolution reaction (HER) nanocrystalline hot filament chemical vapor deposition (HF-CVD) vertically aligned carbon nanotube (VA-CNTs) tungsten carbide

作者机构:

  • [ 1 ] [Fan, Xiujun]Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Guo, Xia]Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Fan, Xiujun]Rice Univ, Dept Chem, Houston, TX 77005 USA
  • [ 4 ] [Zhou, Haiqing]Rice Univ, Dept Chem, Houston, TX 77005 USA
  • [ 5 ] [Fan, Xiujun]Rice Univ, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA
  • [ 6 ] [Zhou, Haiqing]Rice Univ, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA

通讯作者信息:

  • [Fan, Xiujun]Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China

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来源 :

ACS NANO

ISSN: 1936-0851

年份: 2015

期: 5

卷: 9

页码: 5125-5134

1 7 . 1 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:253

JCR分区:1

中科院分区:1

被引次数:

WoS核心集被引频次: 223

SCOPUS被引频次: 230

ESI高被引论文在榜: 0 展开所有

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