CO and ethanol oxidation over LaCoO₃ planar model catalysts: Effect of the thickness

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• 作者：Patrick Herve Tchoua Ngamou ; ^a ; ^{p.h.tchoua.ngamou@tue.nl"" rel=""nofollow} ; ^{ptchoua@pc1.uni-bielefeld.de"" rel=""nofollow} ; Katharina Kohse-H&#xf6 ; inghaus^a ; Naoufal Bahlawane¹ ; ^a
• 关键词：LaCoO₃ thin film catalysts ; Weight-normalized reaction rates ; CO and ethanol oxidation and lattice-oxygen ; Surface oxygen vacancies
• 刊名：Catalysis Communications
• 出版年：2011
• 出版时间：15 August 2011
• 年：2011
• 卷：12
• 期：14
• 页码：1344-1350
• 全文大小：897 K

文摘

The catalytic performance of the LaCoO₃ thin films toward CO and ethanol oxidation was studied in a reactor designed for the investigation of model planar catalysts. The effect of the thickness on the catalytic efficiency and the surface oxygen vacancies offers a straightforward method to identify or discriminate the oxygen species involved in the catalytic reaction. The weight-normalized reaction rate is demonstrated to be an intrinsic parameter and thus confirms the participation of the bulk lattice-oxygen in the studied catalytic reactions. Compared to other perovskite oxide powder catalysts, thin film catalysts show a remarkably higher activity toward ethanol and CO oxidation.