Active Pt/CeO2 catalysts prepared by an alcohol-reduction process for low-temperature CO-PROX reaction

• Published in: Materials for renewable and sustainable energy Vol. 8; no. 3; pp. 1 - 8
• Main Authors: Queiroz, Carla Moreira Santos, Machado, Arthur Pignataro, Paiva, Ana Rita Noborikawa, Antoniassi, Rodolfo Molina, Vaz, Jorge Moreira, Spinacé, Estevam Vitorio
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-09-2019; Springer Nature B.V; SpringerOpen
• Subjects: Alcohol; Alcohol-reduction process; Alcohols; Carbon dioxide; Carbon monoxide; Catalysis; Catalysts; Cerium oxides; Chemistry and Materials Science; CO-PROX reaction; Electron micrographs; Energy transmission; Ethylene glycol; Hydrogen; Low temperature; Materials Science; Microscopes; Nanoparticles; Original Paper; Oxidation; Platinum; Pt/CeO2 catalysts; Reducing agents; Reduction; Renewable and Green Energy; Selectivity; Transmission electron microscopy; X-ray diffraction; X-ray spectroscopy; Alcohol-reduction process; Carbon monoxide; Hydrogen; catalysts; Pt/CeO; CO-PROX reaction
• ISSN: 2194-1459; 2194-1467
• DOI: 10.1007/s40243-019-0155-y

Pt/CeO
2
catalysts were prepared with 0.5 and 1 wt% of Pt loadings by an alcohol-reduction process using a solution of ethylene glycol and water as a reducing agent and solvent. The obtained catalysts were characterized by energy-dispersive X-ray spectroscopy, X-ray diffraction, and transmission electron microscopy. Transmission electron micrographs showed Pt nanoparticles with average sizes of 2.2 and 2.4 nm for Pt content of 0.5 and 1 wt%, respectively. The preferential oxidation of carbon monoxide in hydrogen-rich stream (CO-PROX reaction) was studied in the temperature range of 25–150 °C. Pt/CeO
2
catalysts showed maximum CO conversions in the range of 80–98% and CO
2
selectivity in the range of 50–70% at 50 °C.