Platinum nanoparticles of narrow size distribution (∼2.5 nm) were synthesized using a modified polyol method and deposited on yttria-stabilized zirconia (PtYSZ), carbon (PtC) and -alumina (Pt-Al 2O 3) supports, resulting in 1 wt of Pt loading. PtYSZ has the highest catalytic activity toward CO oxidation among the studied catalysts. Decrease in the average particle size of PtYSZ led to the increase in CO conversion at low temperatures. Enhanced performances can be explained by the thermally induced O 2- backspillover from YSZ over Pt nanoparticles in agreement with the electrochemical promotion mechanism. Observed effect becomes more pronounced with decreasing the particle size.
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Materials Science(all)
- Chemical Engineering(all)
- Physical and Theoretical Chemistry