透视图(图形)
氢
结合能
氢燃料
化学
材料科学
化学物理
计算机科学
物理
原子物理学
人工智能
有机化学
作者
Jie Zheng,Jared Nash,Bingjun Xu,Yushan Yan
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2018-01-01
卷期号:165 (2): H27-H29
被引量:91
摘要
This perspective article formalizes our proposal that the apparent hydrogen binding energy (HBEapp), which takes into account of the water adsorption energy as well as the intrinsic hydrogen binding energy (HBE) on metal surfaces, is the descriptor for hydrogen oxidation/evolution reactions (HOR/HERs). We show that the HBEapp, not HBE, is pH dependent and can be determined from the underpotential-deposited hydrogen peaks in cyclic voltammograms for platinum group metals including Pt, Ir, Pd, and Rh, and the decrease of their HOR/HER activities with pH is the result of a strengthened HBEapp due to a weakened water adsorption. Also discussed are the needs of further experimental and theoretical work to prove this hypothesis.
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