Tungsten carbide as electrocatalyst for the hydrogen evolution reaction in pH neutral electrolyte solutions
Tungsten carbide as electrocatalyst for the hydrogen evolution reaction in pH neutral electrolyte solutions
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DOI：
10.1016/j.apcatb.2009.01.003
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发表时间：
2009-07-15
影响因子：
22.1
通讯作者：
Schroeder, Uwe
中科院分区：
文献类型：
--
作者：
Harnisch, Falk;Sievers, Gustav;Schroeder, Uwe
在本次交流中，我们证明碳化钨 (WC) 是一种很有前途的电催化剂，适用于 pH 中性电解质中的析氢反应。在对含有不同比例的 WC、W2C、W 和 WO2 的混合催化剂的系统研究中，我们表明催化剂的性能与其 WC 含量成正比，而 W2C、W 和 WO2 仅起次要作用。 WC 含量与电催化活性之间的关系表明，析氢和氧化与优先在 WC 上形成的相似表面位点有关。与阳极条件相反，阴极极化减少了腐蚀过程，从而提高了长期稳定性。 (C) 2009 Elsevier B.V. 保留所有权利。
In this communication we demonstrate that tungsten carbide, WC, is a promising electrocatalyst for the hydrogen evolution reaction in pH neutral electrolytes. In a systematic investigation of mixed catalysts containing different fractions of WC, W2C, W and WO2 we show that the performance of the catalyst is proportional to its WC content, whereas W2C, W and WO2 play only a minor role. The relationship between WC content and electrocatalytic activity indicates that hydrogen evolution and oxidation are related to similar surface sites preferentially formed on WC In contrast to anodic conditions, the cathodic polarization diminishes corrosion processes and thus increases the long term stability. (C) 2009 Elsevier B.V. All rights reserved.