Redox mechanism for selective oxidation of ethanol over monolayer V2O5/TiO2 catalysts
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- 作者：Vasily V. Kaicheva ; b ; vvk@catalysis.ru" class="auth_mail" title="E-mail the corresponding author ; Yuriy A. Chesalova ; b ; Andrey A. Saraeva ; b ; Alexander Yu. Klyushinc ; d ; Axel Knop-Gerickec ; Tamara V. Andrushkevicha ; Valerii I. Bukhtiyarova ; b
- 关键词：Heterogeneous catalysis ; Ethanol oxidation ; Acetaldehyde ; Acetic acid ; Vanadia
- 刊名：Journal of Catalysis
- 出版年：2016
- 出版时间：June 2016
- 年：2016
- 卷：338
- 期：Complete
- 页码：82-93
- 全文大小：3009 K
文摘
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The oxidation of ethanol over a monolayer V2O5/TiO2 catalyst was examined.
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The reaction involves reversible reduction of V5+ cations, whereas titanium cations remain in the Ti4+ state.
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At 100–150 °C: acetaldehyde is the main product; at higher temperatures: the reaction shifts toward acetic acid.
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The oxidation of ethanol to acetaldehyde proceeds via the classical Mars–van Krevelen mechanism.
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The production of acetic acid from acetate species proceeds only after the partial oxidation of the catalyst.