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https://doi.org/10.5562/cca3649

Role of the Various Surface Sites and Species in CO Hydrogenation Over Alumina-supported Co-Pd Catalysts

Maya G. Shopska   ORCID icon orcid.org/0000-0002-9714-2464 ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria
Iskra Z. Shtereva ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria
Hristo G. Kolev ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria
Krasimir K. Tenchev ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria
Silviya Z. Todorova ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria
Georgi B. Kadinov ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria

Puni tekst: engleski, pdf (7 MB) str. 121-131 preuzimanja: 187* citiraj
APA 6th Edition
Shopska, M.G., Shtereva, I.Z., Kolev, H.G., Tenchev, K.K., Todorova, S.Z. i Kadinov, G.B. (2020). Role of the Various Surface Sites and Species in CO Hydrogenation Over Alumina-supported Co-Pd Catalysts. Croatica Chemica Acta, 93 (2), 121-131. https://doi.org/10.5562/cca3649
MLA 8th Edition
Shopska, Maya G., et al. "Role of the Various Surface Sites and Species in CO Hydrogenation Over Alumina-supported Co-Pd Catalysts." Croatica Chemica Acta, vol. 93, br. 2, 2020, str. 121-131. https://doi.org/10.5562/cca3649. Citirano 22.09.2021.
Chicago 17th Edition
Shopska, Maya G., Iskra Z. Shtereva, Hristo G. Kolev, Krasimir K. Tenchev, Silviya Z. Todorova i Georgi B. Kadinov. "Role of the Various Surface Sites and Species in CO Hydrogenation Over Alumina-supported Co-Pd Catalysts." Croatica Chemica Acta 93, br. 2 (2020): 121-131. https://doi.org/10.5562/cca3649
Harvard
Shopska, M.G., et al. (2020). 'Role of the Various Surface Sites and Species in CO Hydrogenation Over Alumina-supported Co-Pd Catalysts', Croatica Chemica Acta, 93(2), str. 121-131. https://doi.org/10.5562/cca3649
Vancouver
Shopska MG, Shtereva IZ, Kolev HG, Tenchev KK, Todorova SZ, Kadinov GB. Role of the Various Surface Sites and Species in CO Hydrogenation Over Alumina-supported Co-Pd Catalysts. Croatica Chemica Acta [Internet]. 2020 [pristupljeno 22.09.2021.];93(2):121-131. https://doi.org/10.5562/cca3649
IEEE
M.G. Shopska, I.Z. Shtereva, H.G. Kolev, K.K. Tenchev, S.Z. Todorova i G.B. Kadinov, "Role of the Various Surface Sites and Species in CO Hydrogenation Over Alumina-supported Co-Pd Catalysts", Croatica Chemica Acta, vol.93, br. 2, str. 121-131, 2020. [Online]. https://doi.org/10.5562/cca3649

Sažetak
The paper is focused on evaluation of active centres and impact of adsorbed species on (10%Co+0.5%Pd)/Al2O3 catalyst system performance aiming selectivity optimization. Application of different sets of precursor pretreatment and reduction resulted in catalysts exhibiting high CO conversion or high methane selectivity. A sample of high selectivity was prepared by pretreatment in hydrogen and the performance was determined by lower amount of strongly adsorbed CO, strongly adsorbed carbonate species, and higher amount of reduced metal and bimetallic particles. A more active system was formed by pretreatment in air leading to larger amount of unreduced metal and CO-bridged species on the surface, stable coverage of hydroxyl groups on the support, and medium-strength sites for adsorption of carbonates. Ratios of hydrogen to carbon monoxide adsorption (H/СО) and of strongly to weakly adsorbed СО species appeared as important criteria for catalyst efficiency together with supported metal state, amount of unreduced ions, bimetallic particle formation, and alumina’s ability to adsorb CO and CO2.

Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 International License.

Ključne riječi
Co-Pd catalysts; CO hydrogenation; H2 and CO chemisorption; in situ DRIFTS; surface sites; adsorbed species; activity; selectivity; TPR; TPD; XPS

Hrčak ID: 247328

URI
https://hrcak.srce.hr/247328

Posjeta: 400 *