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One-Step synthesis of PtFe/CeO2 catalyst for the Co-Preferential oxidation reaction at low temperatures

2021; Elsevier BV; Volume: 46; Issue: 34 Linguagem: Inglês

10.1016/j.ijhydene.2021.02.192

1879-3487

Rodolfo M. Antoniassi, Arthur Pignataro Machado, Ana Rita Noborikawa Paiva, Carla Moreira Santos Queiroz, Jorge Moreira Vaz, Estevam V. Spinacé, Júlio César M. Silva, Eduardo Carmine de Melo, Pedro H. C. Camargo, Roberto M. Torresi,

Catalysis and Hydrodesulfurization Studies

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.