Nanosized Pt-Co catalysts for the preferential CO oxidation

Eun Yong Ko, Eun Duck Park, Kyung Won Seo, Hyun Chul Lee, Doohwan Lee, Soonho Kim

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10 Scopus citations


The preferential CO oxidation in the presence of excess hydrogen was studied over Pt-Co/γ-Al 2O 3. CO chemisorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDX) and temperature programmed reduction (TPR) were conducted to characterize active catalysts. The catalytic activity for CO oxidation and methanation at low temperatures increased with the amounts of cobalt in Pt-Co/γ-Al 2O 3. This accompanied the TPR peak shift to lower temperatures. The optimum molar ratio between Co and Pt was determined to be 10. The co-impregnated Pt-Co/γ-Al 2O 3 appeared to be superior to Pt/Co/γ-Al 2O 3 and Co/Pt/γ-Al 2O 3. The reductive pretreatment at high temperature such as 773 K increased the CO 2 selectivity over a wide reaction temperature. The bimetallic phase of Pt-Co seems to give rise to high catalytic activity in selective oxidation of CO in H 2-rich stream.

Original languageEnglish
Pages (from-to)3567-3571
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Issue number11
StatePublished - Nov 2006


  • CO oxidation
  • Fuel cell
  • PROX
  • Pt-Co
  • Pt/γ-Al O


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