析氧
材料科学
X射线光电子能谱
钴
杂原子
电催化剂
吸附
化学工程
催化作用
电化学
冶金
物理化学
电极
化学
有机化学
工程类
生物化学
戒指(化学)
作者
Lei Wang,Quan Zhou,Zonghua Pu,Qi Zhang,Xueqin Mu,Haiyan Jing,Suli Liu,Changyun Chen,Shichun Mu
出处
期刊:Nano Energy
[Elsevier]
日期:2018-11-01
卷期号:53: 270-276
被引量:136
标识
DOI:10.1016/j.nanoen.2018.08.061
摘要
Heteroatom inducement is a possible way to tune the catalytic capability of electrocatalysts in oxygen evolution reaction (OER). In this work, we adopt a facile solid-liquid-phase chemical method to yield hollow Ru-RuPx-CoxP polyhedra. Herein, the in-situ introduced Ru can induce the surface reconstruction of Co2P into Ru-RuPx-CoxP polyhedra due to unstable surface terminations proved by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Line-scan electron energy loss spectroscopy (EELS) analyses. As expected, Ru-RuPx-CoxP with large specific surface area and abundant active sites shows remarkable high OER catalytic activity (η10 = 291 mV) and stability (at least 10000 cycles). DFT calculations further demonstrate that the presence of Ru metal promotes the electrocatalytic reaction kinetics through increasing the density of states at the Fermi level with reduced intermediate adsorption energy and improving electron transfer.
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