Light-off performance over cobalt oxide- and ceria-promoted platinum and palladium catalysts
Journal article, 1998

Monolith catalysts containing Co, Ce, Pt and Pd supported on alumina were prepared and tested with respect to low-temperature activity for oxidation of CO and propene. The catalysts were either pre-oxidised or pre-reduced prior to evaluation with respect to light-off performance, using net oxidising and net reducing CO/C3H6/O2/N2 gas mixtures. Promotion of Pt and Pd with cobalt or cerium oxide, favoured the low temperature activity significantly. Pre-reduction of Co- and Ce-promoted noble metals shifted the conversion starts of CO and propene toward lower temperatures compared with pre-oxidised samples. Pre-reduction of cobalt oxide, without Pt or Pd, yielded a dramatic improvement of the low-temperature catalytic performance compared with pre-oxidation of the said oxide. The catalysts were characterised by temperature programmed desorption of CO and specific surface area measurements. The high activity over the pre-reduced cobalt containing catalysts is suggested to be due to the presence of reduced cobalt oxide sites on those samples.

TEMPERATURE

CO OXIDATION

NO REDUCTION

Author

Magnus Skoglundh

Competence Centre for Catalysis (KCK)

Department of Engineering Chemistry

Anders Törncrona

Department of Engineering Chemistry

Competence Centre for Catalysis (KCK)

Peter Thormählen

Department of Chemical Reaction Engineering

Chalmers, Applied Physics, Chemical Physics

Competence Centre for Catalysis (KCK)

Erik Fridell

Chalmers, Applied Physics, Chemical Physics

Competence Centre for Catalysis (KCK)

Astrid Drewsen

Department of Chemical Reaction Engineering

Competence Centre for Catalysis (KCK)

Edward Jobson

Competence Centre for Catalysis (KCK)

Studies in Surface Science and Catalysis

0167-2991 (ISSN)

Vol. 116 113-122

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Chemical Engineering

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Created

10/7/2017