Effect of Cobalt on the Activity of CuO/CeO₂ Catalyst for the Selective Oxidation of CO

• Published in: Catalysis letters Vol. 134; no. 3-4; pp. 196 - 203
• Main Authors: Lendzion-Bieluń, Z, Bettahar, M. M, Monteverdi, S, Moszyński, D, Narkiewicz, U
• Format: Journal Article
• Language: English
• Published: Boston Boston : Springer US 01.02.2010; Springer US; Springer; Springer Nature B.V
• Subjects: Catalysis; Catalysts; Catalytic activity; Cerium oxides; Chemistry; Chemistry and Materials Science; Cobalt; Copper; Copper oxides; Dispersion; Exact sciences and technology; General and physical chemistry; Industrial Chemistry/Chemical Engineering; Organometallic Chemistry; Oxidation; Physical Chemistry; Selectivity; Synergistic effect; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; X ray photoelectron spectroscopy; Cobalt oxide; Copper oxide; CO oxidation; Ceria; Binary compound; Reducibility; Segregation; Combustion; X ray; Selectivity; Cerium oxide; Cobalt; Lanthanide compound; Additive; Photoelectron spectrometry; Oxidation; Copper; Catalytic reaction; Transition element compounds; Transition metal; X ray diffraction; Dispersion; Heterogeneous catalysis; Gases; Impregnation; Transmission electron microscopy; Catalyst activity; Catalyst
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-009-0257-8

In this work effect of cobalt on catalyst CuO/CeO₂ activity in selective CO oxidation in H₂-containing gases mixture was investigated. Catalysts were prepared by wet impregnation and calcination at 673 K, characterized by ICP, H₂-TPR, XRD, TEM, BET and XPS. The addition of cobalt to Cu/CeO₂ catalyst improved the catalytic activity and selectivity for CO oxidation. Discussion of the results showed that the synergistic effect is correlated to better dispersion and reducibility of copper in the presence of the cobalt metal additive. More precisely, cobalt enhanced the segregation of copper phase towards the catalyst surface and copper enhanced CO oxidation at the expense of H₂ combustion. Graphical Abstract The addition of cobalt to Cu/CeO2 catalyst improved the catalytic activity and selectivity for CO oxidation. The synergistic effect is correlated to better dispersion and reducibility of copper in the presence of the cobalt metal additive. [graphic removed]