Please use this identifier to cite or link to this item: https://doi.org/10.1039/c6cp05934a
Title: The role of metal-support interaction for CO-free hydrogen from low temperature ethanol steam reforming on Rh-Fe catalysts
Authors: Choong, C.K.S
Chen, L 
Du, Y
Schreyer, M
Daniel Ong, S.W
Poh, C.K
Hong, L 
Borgna, A 
Issue Date: 2017
Publisher: Royal Society of Chemistry
Citation: Choong, C.K.S, Chen, L, Du, Y, Schreyer, M, Daniel Ong, S.W, Poh, C.K, Hong, L, Borgna, A (2017). The role of metal-support interaction for CO-free hydrogen from low temperature ethanol steam reforming on Rh-Fe catalysts. Physical Chemistry Chemical Physics 19 (6) : 4199-4207. ScholarBank@NUS Repository. https://doi.org/10.1039/c6cp05934a
Abstract: Rh-Fe catalysts supported on Ca-Al2O3, MgO and ZrO2 were evaluated in ethanol steam reforming at 623 K and compared to Rh catalysts on the same supports without iron promotion. The metal-support interaction among the three entities, i.e. Rh ↔ Fe2O3 support (ZrO2, MgO and Ca-Al2O3) was investigated using H2-chemisorption, TEM, XPS and in situ techniques such as DRIFTS, temperature-resolved XRD and XAS. As compared to the unpromoted Rh catalysts on the same supports, the CO selectivity is depressed in the presence of iron on Rh/MgO and Rh/Ca-Al2O3, the latter being significantly superior. The role of metal-support interaction for CO-free hydrogen generation was unravelled using a combination of techniques. It was found that the reducibility of iron oxide determines the extent of the strong metal support interaction between Rh and Fe2O3 and the reducibility of iron oxide was affected by the support. On Rh-Fe/Ca-Al2O3, a good balance of the interaction between Rh, Fe2O3 and Ca-Al2O3 prevents strong metal support interaction between Rh and Fe2O3 and thus promotes CO elimination via water-gas-shift reaction on Rh-FexOy sites. © the Owner Societies 2017.
Source Title: Physical Chemistry Chemical Physics
URI: https://scholarbank.nus.edu.sg/handle/10635/174238
ISSN: 14639076
DOI: 10.1039/c6cp05934a
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