H2-TPR, XPS and TEM Study of the Reduction of Ru and Re promoted Co/γ-Al2O3, Co/TiO2 and Co/SiC Catalysts
Romar, H., Lillebø, A. H., Tynjälä, P., Hu, T., Holmen, A., Blekkan, E. A., & Lassi, U. (2016). H2-TPR, XPS and TEM Study of the Reduction of Ru and Re promoted Co/γ-Al2O3, Co/TiO2 and Co/SiC Catalysts. Journal of Materials Science Research, 5(2), 33-43. https://doi.org/10.5539/jmsr.v5n2p33
Published in
Journal of Materials Science ResearchAuthors
Hu, T. |
Date
2016Copyright
© Canadian Center of Science and Education. This is an open access article distributed under the terms of a Creative Commons License.
Effects of Ru and Re promoters on Co-CoOx catalysts supported on γ-Al2O3, TiO2 and SiC were investigated to
improve the understanding of the role of promoters of the active phase of Co-CoOx-Ru and Co-CoOx-Re. The
influence of promoter addition on the composition and activity of the catalysts was characterized by several
methods, such as H2-TPR, XPS, chemisorption and TEM. Furthermore, the role of support and metal-support
interaction was especially studied and different support materials were compared.
Based on the results, addition of promoter metals (Ru or Re) will most likely improve catalytic activity of Co/γ-
Al2O3, Co/TiO2 and Co/SiC catalysts by increasing the active metal surface available for chemical reaction and by
decreasing the size of the metallic nanoparticles. These changes in the catalytic activity were also associated with
the changes in the ratio of metal and metal oxide phases in the surface composition as observed by XPS. Promoter
metals also decreased the reduction temperatures needed for the reduction of Co3O4 to CoO and further to metallic
cobalt. Significant decrease in reduction temperature was observed especially when ruthenium was used as the
promoter.
...
Publisher
Canadian Center of Science and EducationISSN Search the Publication Forum
1927-0585Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/27007599
Metadata
Show full item recordCollections
License
Except where otherwise noted, this item's license is described as © Canadian Center of Science and Education. This is an open access article distributed under the terms of a Creative Commons License.
Related items
Showing items with similar title or keywords.
-
Characterization of Cobalt Catalysts on Biomass-Derived Carbon Supports
Lahti, Riikka; Bergna, Davide; Romar, Henrik; Hu, Tao; Comazzi, Alberto; Pirola, Carlo; Bianchi, Claudia L.; Lassi, Ulla (Springer, 2017)Cobalt catalysts are known to have a high activity and selectivity in the Fischer–Tropsch reaction converting synthesis gas to higher hydrocarbons (C5+). These catalysts have been supported by different porous materials. ... -
Chalcogenide-capped triiron clusters [Fe3(CO)9(μ3-E)2], [Fe3(CO)7(μ3-CO)(μ3-E)(μ-dppm)] and [Fe3(CO)7(μ3-E)2(μ-dppm)] (E = S, Se) as proton-reduction catalysts
Rahaman, Ahibur; Ghosh, Shishir; Basak-Modi, Sucharita; Abdel-Magied, Ahmed F.; Kabir, Shariff E.; Haukka, Matti; Richmond, Michael G.; Lisensky, George C.; Nordlander, Ebbe; Hogarth, Graeme (Elsevier BV, 2019)Chalcogenide-capped triiron clusters [Fe3(CO)7(μ3-CO)(μ3-E)(μ-dppm)] and [Fe3(CO)7(μ3-E)2(μ-dppm)] (E = S, Se) have been examined as proton-reduction catalysts. Protonation studies show that [Fe3(CO)9(μ3-E)2] are unaffected ... -
Effect of atomic layer deposited zinc promoter on the activity of copper-on-zirconia catalysts in the hydrogenation of carbon dioxide to methanol
Arandia, Aitor; Yim, Jihong; Warraich, Hassaan; Leppäkangas, Emilia; Bes, René; Lempelto, Aku; Gell, Lars; Jiang, Hua; Meinander, Kristoffer; Viinikainen, Tiia; Huotari, Simo; Honkala, Karoliina; Puurunen, Riikka L. (Elsevier, 2023)The development of active catalysts for carbon dioxide (CO2) hydrogenation to methanol is intimately related to the creation of effective metal-oxide interfaces. In this work, we investigated how the order of addition of ... -
GraphoGame – a catalyst for multi-level promotion of literacy in diverse contexts
Ojanen, Emma; Ronimus, Miia; Ahonen, Timo; Chansa-Kabali, Tamara; February, Pamela; Jere-Folotiya, Jacqueline; Kauppinen, Karri-Pekka; Ketonen, Ritva; Ngorosho, Damaris; Pitkänen, Mikko; Puhakka, Carol Suzanne; Sampa, Francis; Walubita, Gabriel; Yalukanda, Christopher; Pugh, Ken; Richardson, Ulla; Serpell, Robert; Lyytinen, Heikki (Frontiers Research Foundation, 2015)GraphoGame (GG) is originally a technology-based intervention method for supporting children with reading difficulties. It is now known that children who face problems in reading acquisition have difficulties in learning ... -
Does Implementation Follow Design? A Case Study of a Workplace Health Promotion Program Using the 4-S Program Design and the PIPE Impact Metric Evaluation Models
Äikäs, Antti; Pronk, Nicolaas P.; Hirvensalo, Mirja; Absetz, Pilvikki (Lippincott Williams & Wilkins; American College of Occupational and Environmental Medicine, 2017)Objective: The aim of this study was to describe the content of a multiyear market-based workplace health promotion (WHP) program and to evaluate design and implementation processes in a real-world setting. Methods: ...