Adsorption and oxidation of acetaldehyde on carbon supported Pt, PtSn and PtSn-based trimetallic catalysts by in situ Fourier transform infrared spectroscopy

被引：14
作者：
Beyhan, Seden [1 ,2 ]
Leger, Jean-Michel [2 ]
Kadirgan, Figen [1 ]
机构：
[1] Istanbul Tech Univ, Dept Chem, Fac Sci & Letters, TR-34469 Istanbul, Turkey
[2] Univ Poitiers, CNRS, UMR 7285, Electrocatalysis Grp,IC2MP, F-86022 Poitiers, France
来源：
JOURNAL OF POWER SOURCES | 2013年 / 242卷
关键词：
In situ infrared spectroscopy; Acetaldehyde oxidation; Platinum-tin catalyst; Trimetallic catalyst; ETHANOL OXIDATION; FUEL-CELL; ACETIC-ACID; PLATINUM; CO; ELECTROOXIDATION; ELECTRODE; MONOXIDE; INTERFACES; ALDEHYDES;
D O I：
10.1016/j.jpowsour.2013.05.112
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：
The adsorption and oxidation of acetaldehyde on carbon supported Pt, Pt90Sn10 and Pt80Sn10M10 (M = Ni, Co, Rh, Pd) catalysts have been investigated by using in situ Fourier transform infrared (FIR) spectroscopy. The result revealed that Pt90Sn10/C catalyst is not very efficient for the conversion of acetaldehyde to CO2 due to the weak adsorption of acetaldehyde in the presence of Sn. However, the addition of a third metal to Pt-Sn facilitates the C C bond cleavage of acetaldehyde. It seems that acetaldehyde is adsorbed dissociatively on the surface of Pt80Sn10Ni10/C, Pt80Sn10Co10/C, Pt80Sn10Rh10/C catalysts, producing CH3 and CHO adsorbate species, which can be further oxidized to CO2. However, the pathway forming CO2 for Pt80Sn10Pd10/C catalyst mainly originates from the oxidation of CH3CO species. Thus, the presence of third metal in the PtSn catalyst has a strong impact upon the acetaldehyde adsorption behaviour and its reaction products. (C) 2013 Elsevier B.V. All rights reserved.
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收藏
页码：503 / 509
页数：7
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