A temperature programmed desorption study of the interaction of ethyl cyanoacetate and benzaldehyde on metal oxide surfaces

Title: A temperature programmed desorption study of the interaction of ethyl cyanoacetate and benzaldehyde on metal oxide surfaces
Creator: Li, Jerry Pui Ho; Stockenhuber, Michael
Relation: Catalysis Today Vol. 245, p. 108-115
Publisher Link: http://dx.doi.org/10.1016/j.cattod.2014.07.020
Publisher: Elsevier
Resource Type: journal article
Date: 2015
Description: Reagents from a base catalysed condensation reaction (Knoevenagel condensation reaction between ethyl cyanoacetate and benzaldehyde), were adsorbed on ZnO and Al₂O₃ catalyst surfaces and subject to temperature programmed desorption experiments, monitored using mass spectrometry. Ethyl formate, ketenimine species, carbon dioxide and carbon monoxide were desorption products from ethyl cyanoacetate, while benzene, carbon dioxide and carbon monoxide were desorbed from the catalysts loaded with benzaldehyde. The formation of the ketenimine species was confirmed by in situ FTIR experiments. The observation of the decomposition species further substantiates a proposed reaction mechanism for the Knoevenagel condensation reaction on the catalyst surface of some oxide catalysts.
Subject: Knoevenagel condensation; TPD; FTIR; chemisorption; metallic oxides
Identifier: http://hdl.handle.net/1959.13/1331994
Identifier: uon:26756
Identifier: ISSN:0920-5861
Language: eng
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