NDLI: $CO_{2}$ Methanation on Supported Rh Nanoparticles: The combined Effect of Support Oxygen Storage Capacity and Rh Particle Size

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$CO_{2}$ Methanation on Supported Rh Nanoparticles: The combined Effect of Support Oxygen Storage Capacity and Rh Particle Size

Content Provider	MDPI
Author	Botzolaki, Georgia Goula, Grammatiki Rontogianni, Anatoli Nikolaraki, Ersi Chalmpes, Nikolaos Zygouri, Panagiota Karakassides, Michalis Gournis, Dimitrios Charisiou, Nikolaos Goula, Maria Papadopoulos, Stylianos Yentekakis, Ioannis
Copyright Year	2020
Description	CO2 hydrogenation toward methane, a reaction of high environmental and sustainable energy importance, was investigated at 200–600 °C and H2/CO2 = 4/1, over Rh nanoparticles dispersed on supports with different oxygen storage capacity characteristics (γ-Al2O3, alumina-ceria-zirconia, and ceria-zirconia). The effects of the support OSC and Rh particle size on reaction behavior under both integral and differential conditions were investigated, to elucidate the combined role of these crucial catalyst design parameters on methanation efficiency. A volcano-type variation of methanation turnover frequency was found in respect to support OSC; Rh/ACZ, with intermediate OSC, was the optimal catalyst. The structure sensitivity of the reaction was found to be a combined function of support OSC and Rh particle size: For Rh/γ-Al2O3 (lack of OSC) methanation was strongly favored on small particles—the opposite for Rh/CZ (high OSC). The findings are promising for rational design and optimization of CO2 methanation catalysts by tailoring the aforementioned characteristics.
Starting Page	944
e-ISSN	20734344
DOI	10.3390/catal10080944
Journal	Catalysts
Issue Number	8
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2020-08-17
Access Restriction	Open
Subject Keyword	Catalysts Applied Chemistry Co2 Hydrogenation Rhodium Nanoparticles Oxygen Storage Capacity Structure-sensitive Reaction Alumina Ceria Zirconia Mixed Oxide Supports Oxygen Vacancies
Content Type	Text
Resource Type	Article

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