Materials for Renewable and Sustainable Energy (Aug 2019)

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

  • Carla Moreira Santos Queiroz,
  • Arthur Pignataro Machado,
  • Ana Rita Noborikawa Paiva,
  • Rodolfo Molina Antoniassi,
  • Jorge Moreira Vaz,
  • Estevam Vitorio Spinacé

DOI
https://doi.org/10.1007/s40243-019-0155-y
Journal volume & issue
Vol. 8, no. 3
pp. 1 – 8

Abstract

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Abstract Pt/CeO2 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/CeO2 catalysts showed maximum CO conversions in the range of 80–98% and CO2 selectivity in the range of 50–70% at 50 °C.

Keywords