College of Chemistry, Sichuan University, Chengdu 610064, China.
Nanoscale. 2018 Feb 1;10(5):2213-2217. doi: 10.1039/c7nr08472b.
It is of great importance to design and develop highly active electrocatalysts for the hydrogen evolution reaction (HER) under alkaline conditions. In this work, we report the development of a CeO-CuP nanoarray supported on nickel foam (CeO-CuP/NF) as an excellent HER catalyst with the demand of an overpotential of only 148 mV to deliver a geometrical catalytic current density of 20 mA cm in 1.0 M KOH. Remarkably, this catalyst also shows strong long-term electrochemical durability for at least 100 h with nearly 100% Faradaic efficiency. Density functional theory calculations reveal that the CeO-CuP/NF hybrid has a lower water dissociation energy and a more thermo-neutral hydrogen adsorption free energy.
在碱性条件下设计和开发高效的析氢反应（HER）电催化剂非常重要。在这项工作中，我们报告了一种 CeO-CuP 纳米阵列负载在泡沫镍上（CeO-CuP/NF）的开发，它作为一种优秀的 HER 催化剂，仅需 148 mV 的过电势即可在 1.0 M KOH 中提供 20 mA cm 的几何催化电流密度。值得注意的是，该催化剂还表现出强的长期电化学耐久性，至少 100 小时内的法拉第效率接近 100%。密度泛函理论计算表明，CeO-CuP/NF 杂化物具有更低的水离解能和更热中性的氢吸附自由能。
