Ethylene adsorption and oxidation on Pt(h k l) in acidic media

被引：23

作者：

Berna, Antonio ^{[1
]}

Kuzume, Akiyoshi ^{[1
]}

Herrero, Enrique ^{[1
]}

Feliu, Juan M. ^{[1
]}

机构：

[1] Univ Alicante, Dept Quim Fis, Inst Electroquim, E-03080 Alicante, Spain

来源：

SURFACE SCIENCE | 2008年 / 602卷 / 01期

关键词：

ethylene adsorption; ethylene oxidation; IRRAS; Pt single crystal surfaces; vinylidene;

D O I：

10.1016/j.susc.2007.09.046

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ethylene adsorption and oxidation on platinum electrodes have been investigated in acidic solution by means of cyclic voltammetry and in situ infrared spectroscopy. Ethylene oxidation is a surface structure-sensitive reaction being Pt(I 11) the only active electrode surface at potentials below surface oxidation. In situ infrared reflection absorption spectroscopy (IRRAS) allows to identify the products formed during the adsorption and oxidation of ethylene. Vinylidene species were detected as oxidized adsorbates coming from ethylene and the only oxygen-containing species observed were on-top adsorbed CO and dissolved CO2 that is the final oxidation product. A potential dependent equilibrium for transformation between two different adsorption configurations of adsorbed vinylidene, mu(3)-eta(2)-C=CH2 and mu-C=CH2, has been observed. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：84 / 94

页数：11

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