caa a22 4500 463227093 CHVBK 20180405153230.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1007/s10853-006-0894-x doi (NATIONALLICENCE)springer-10.1007/s10853-006-0894-x Particle size and support effects on the complete benzene oxidation by Co and Co-Pt catalysts [Elektronische Daten] [Silviya Todorova, Georgi Kadinov, Krasimir Tenchev, Yuri Kalvachev, Vladislav Kostov-Kytin] Monometallic cobalt and bimetallic Co-Pt samples of various particle sizes have been prepared using SiO2 and synthetic kenyaite (layered silicate) as a support. They are characterized by elemental analysis, XRD, TPR, and XPS. Cobalt is introduced by two methods—classical impregnation and ammonia method. The ammonia method of preparation leads to the formation of finely dispersed Co3O4 on both supports. Besides, hardly reducible cobalt silicate phases appear predominantly on the SiO2 support. The Co3O4 particle size varies between 5 and 20nm, depending on the support. The monometallic Co samples prepared by ammonia method on both supports are more active in benzene combustion than the impregnated ones due to the finer dispersion of the easily reducible Co3O4. Addition of Pt improves the activity and the promoting effect is more evident for the impregnated sample. This is explained with the synergy effect of cobalt oxide species and Pt. The less promoting effect of Pt on the catalytic activity of the bimetallic kenyaite-supported samples is attributed to the stronger interaction between the Co oxide phase and Pt during the preparation process. Springer Science+Business Media, LLC, 2007 Todorova Silviya Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 11, 1113, Sofia, Bulgaria aut Kadinov Georgi Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 11, 1113, Sofia, Bulgaria aut Tenchev Krasimir Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 11, 1113, Sofia, Bulgaria aut Kalvachev Yuri Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 107, 1113, Sofia, Bulgaria aut Kostov-Kytin Vladislav Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 107, 1113, Sofia, Bulgaria aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/10(2007-05-01), 3315-3320 0022-2461 42:10<3315 2007 42 10853 https://doi.org/10.1007/s10853-006-0894-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0894-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Todorova Silviya Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 11, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Kadinov Georgi Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 11, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Tenchev Krasimir Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 11, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Kalvachev Yuri Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 107, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Kostov-Kytin Vladislav Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 107, 1113, Sofia, Bulgaria aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/10(2007-05-01), 3315-3320 0022-2461 42:10<3315 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer