文献类型：期刊文献

英文题名：The mechanism of CO coupling reaction to form dimethyl oxalate over Pd/α-Al₂O₃

作者：Ji, Yang[1];Liu, Gang[1];Li, Wei[1];Xiao, Wende[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：314

期号：1-2

起止页码：63

外文期刊名：JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000272114300010)】；

语种：英文

外文关键词：Dimethyl oxalate; Methyl nitrite; CO; Pd/alpha-Al2O3; FTIR; Mechanism

摘要：The purpose Of this study is to investigate the mechanism Of CO coupling reaction to form dimethyl oxalate (DMO) over Pd/alpha-Al2O3 by using in situ infrared spectroscopy. The formation of DMO is initiated by methyl nitrite (MN) adsorption and CO adsorption over Pd/alpha-Al2O3. Two intermediates, ON-Pd-OCH3 and ON-Pd-COOCH3, were identified. The formation of DMO proceeds via coupling two ON-Pd-COOCH3 intermediates CO adsorption generates linearly bonded CO and bridge bonded CO over Pd/alpha-Al2O3, but only bridge bonded CO participates in the reaction Moreover, the ratio of ON-Pd-OCH3 to bridge bonded CO over Pd/alpha-Al2O3 Surface has significant influence oil the formations Of by-products (methyl formate (MF) and dimethyl carbonate (DMC)) (C) 2009 Elsevier B V All rights reserved