caa a22 4500 463251652 CHVBK 20180405153341.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10562-007-9099-4 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9099-4 Preparation and catalytic performance of Co3O4 catalysts for low-temperature CO oxidation [Elektronische Daten] [Yong-Zhao Wang, Yong-Xiang Zhao, Chun-Guang Gao, Dian-Sheng Liu] Without use of any surfactant or oxidant, a series of Co3O4 catalysts have been prepared from cobalt nitrate aqueous solution via a very simple liquid-precipitation method with ammonium acid carbonate followed by calcination at various temperatures. The catalytic performance of the Co3O4 for CO oxidation has been studied with a continuous flowing laboratory microreactor system. The results show that the CO conversion of all the samples can reach 100% at ambient temperature. The catalyst calcined at 300°C is able to maintain its activity for CO complete oxidation more than 500min at 25°C and about 240min even at −78°C. High reaction temperature results in a high catalytic stability, while the catalytic stability decreases with further increasing the reaction temperature. Characterizations with X-ray powder diffraction and transmission electron microscopy suggest that all the samples exist as a pure Co3O4 phase with the spinel structure, the samples are apt to aggregate and the specific surface area gradually decreases with increasing the calcination temperature, which directly leads to the decrease of catalytic stability. Furthermore, the amount of active oxygen species measured by CO titration experiments appears to be critical for catalytic performance. Springer Science+Business Media, LLC, 2007 Co3O4 nationallicence liquid-precipitation nationallicence low-temperature CO oxidation nationallicence active oxygen species nationallicence Wang Yong-Zhao School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut Zhao Yong-Xiang School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut Gao Chun-Guang School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut Liu Dian-Sheng School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut Catalysis Letters Springer US; http://www.springer-ny.com 116/3-4(2007-08-01), 136-142 1011-372X 116:3-4<136 2007 116 10562 https://doi.org/10.1007/s10562-007-9099-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9099-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Yong-Zhao School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut NATIONALLICENCE 700 1- Zhao Yong-Xiang School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut NATIONALLICENCE 700 1- Gao Chun-Guang School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut NATIONALLICENCE 700 1- Liu Dian-Sheng School of Chemistry and Chemical Engineering, Institute of Advanced Chemistry, Shanxi University, 030006, Taiyuan, China aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 116/3-4(2007-08-01), 136-142 1011-372X 116:3-4<136 2007 116 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer