One-Step synthesis of PtFe/CeO2 catalyst for the Co-Preferential oxidation reaction at low temperatures. (17th May 2021)

• Record Type: Journal Article
• Authors: Antoniassi, Rodolfo M.; Machado, Arthur P.; Paiva, Ana Rita N.; Queiroz, Carla M.S.; Vaz, Jorge M.; Spinacé, Estevam V.; Silva, Julio Cesar M.; Carmine, Eduardo; Camargo, Pedro H.C.; Torresi, Roberto M.
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 34(2021)
• Page Start: 17751
• Page End: 17762
• Publication Date: 2021-05-17
• Subjects: Pt nanoparticles -- Pt/Fe-based catalysts -- CO-PROX -- Hydrogen -- Borohydride reduction process; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.02.192
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Active Pt-based catalysts at low temperature towards the preferential oxidation of carbon monoxide in hydrogen-rich stream reaction (CO-PROX) are of great importance for H2 -fueled fuel cells, but still remain a challenge. Herein, we propose a simple approach to synthesize a highly active Pt20 Fe/CeO2 catalyst employing the borohydride reduction process. Transmission electronic microscopy revealed monodispersed 2.8 nm-Pt nanoparticles on CeO2, and the role of Fe species on the activity is discussed. The excellent CO conversion of 99.6% and CO2 selectivity of 92.3% carried out at ambient temperature meet the CO-PROX requirements for an adequate supply of hydrogen in fuel cell device. Graphical abstract: Image 1 Highlights: Highly active Pt20Fe/CeO2 synthesized by borohydride without any pre-treatment. Fe species promotes the oxygen activation at low temperatures. Pt20 Fe/CeO2 performance fulfills the CO-PROX "50:50 goal".