ANA RITA NOBORIKAWA PAIVA
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Artigo IPEN-doc 27791 One-Step synthesis of PtFe/CeO2 catalyst for the Co-Preferential oxidation reaction at low temperatures2021 - ANTONIASSI, RODOLFO M.; MACHADO, ARTHUR P.; PAIVA, ANA R.N.; QUEIROZ, CARLA M.S.; VAZ, JORGE M.; SPINACE, ESTEVAM V.; SILVA, JULIO C.M.; CARMINE, EDUARDO; CAMARGO, PEDRO H.C.; TORRESI, ROBERTO M.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 Pt20Fe/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.