A combined surface-enhanced infrared and electrochemical kinetics study of hydrogen adsorption and evolution on a Pt electrode
A combined surface-enhanced infrared and electrochemical kinetics study of hydrogen adsorption and evolution on a Pt electrode
复制标题
DOI：
10.1016/j.cplett.2004.11.100
复制
发表时间：
2005-01-11
影响因子：
2.8
通讯作者：
Osawa, M
中科院分区：
文献类型：
--
作者：
Kunimatsu, K;Senzaki, T;Osawa, M
用表面增强红外光谱技术研究了多晶铂电极在酸性介质中对氢原子的吸附，并与析氢反应动力学进行了定量比较。在H的演化电势范围(E<；0.1V vs.RHE)，在2100 cm(-1)附近观察到了铂-氢的伸缩振动。她的电流与0.02<；E<；0时能带强度的平方成正比。由此推断，吸附的氢原子是HER的反应中间体，两个吸附的氢原子的结合是速率决定的。在E<；0.02V处，由于H-2在界面处的过饱和，在IR和电化学测量之间发现了不一致。(C)2004爱思唯尔B.V.保留所有权利。
The adsorption of hydrogen atoms oil a polycrystalline Pt electrode was examined in acid by surface-enhanced infrared (IR) spectroscopy, and the IR data was quantitatively compared with the kinetics of hydrogen evolution reaction (HER). The Pt-H stretching vibration was observed around 2100 cm(-1) in the H, evolution potential range (E < 0.1 V vs. RHE). The current of HER was proportional to the square of the band intensity at 0.02 < E < 0. 1 V. from which it was concluded that the adsorbed hydrogen atom is the reaction intermediate of HER and the combination of two adsorbed hydrogen atoms is rate-deter-mining. At E < 0.02 V. on the other hand, an inconsistency was found between the IR and electrochemical measurements due to the supersaturation of H-2 at the interface. (C) 2004 Elsevier B.V. All rights reserved.