Adsorption and Reaction of Acetaldehyde over CeOX(111) Thin Films

被引：42

作者：

Chen, T. -L. ^{[1
]}

Mullins, D. R. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 08期

关键词：

CERIUM OXIDE; SINGLE-CRYSTAL; CARBON BOND; ZINC-OXIDE; SURFACES; METHANOL; SPECTROSCOPY; TIO2(110); ACETONE; FORMALDEHYDE;

D O I：

10.1021/jp110429s

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：

This study reports the interaction of acetaldehyde with well-ordered CeOX(111) thin film surfaces. The fully oxidized CeO2(111) surface shows a weak interaction with I acetaldehyde with the sole desorption product (TPD) being the parent molecule at 210 K. The chemisorbed molecule binds to the surface as the eta(1)-acetaldehyde species rather than through a bridge-bonded dioxy configuration. Acetaldehyde chemisorbs strongly on reduced CeO2-X(111) with nonrecombinative and recombinative acetaldehyde desorbing at 405 and 550-600 K, respectively. Deoxygenation and dehydration also occur, producing ethylene and acetylene at 580 and 620 K, respectively. Acetaldehyde initially adsorbs in the eta(1) configuration and then converts to a carbanion species with both C=C and C=O bond character above 300 K.

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收藏

页码：3385 / 3392

页数：8

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