High-performance tungsten carbide electrocatalysts for the hydrogen evolution reaction
High-performance tungsten carbide electrocatalysts for the hydrogen evolution reaction
复制标题
用于析氢反应的高性能碳化钨电催化剂
DOI：
10.1039/c9se00853e
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发表时间：
2020-03-01
影响因子：
5.6
通讯作者：
Liu, Wei
中科院分区：
文献类型：
--
作者：
Huang, Jingwen;Hong, Wenting;Liu, Wei
较高的电荷传输效率和较大的比表面积是影响析氢反应的两个关键因素。在这项工作中，我们报道了一种简单的方法，通过高温碳化反应在钨箔上制备碳化钨。具有高导电性的WC纳米颗粒与W箔形成化学键，从而显著降低了催化剂(WC)与电极(W箔)之间的接触电阻。WC/W电极具有很高的析氢活性，在0.5M硫酸和1M KOH中的过电位分别为87 mV和68 mV，电流密度分别为10 mA cm−2。
High charge transport efficiency and large specific surface are two critical factors for the hydrogen evolution reaction. In this work, we report a simple method to fabricate tungsten carbide (WC) on W foil through a carbonization reaction at high temperature. WC nanoparticles with high conductivity form chemical bonds with W foil, thereby significantly minimizing the contact resistance between the catalyst (WC) and electrode (W foil). As an outstanding hydrogen evolution cathode, the WC/W electrode exhibits high HER activity with overpotentials of 87 mV and 68 mV to drive a current density of 10 mA cm−2 in 0.5 M H2SO4 and 1 M KOH, respectively.