Water-gas shift: Characterization and testing of nanoscale YSZ supported Pt catalysts

Water-gas shift: Characterization and testing of nanoscale YSZ supported Pt catalysts

•YSZ supports (cubic) are more reducible than zirconia (tetragonal).•Pt promotion further facilitates reduction.•Y-doping of zirconia increases the number of surface defects (e.g., bridging OH groups).•Highest formate decomposition rate (surface O mobility) observed for 0.5%Pt/YSZ.•The activity of P...

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Veröffentlicht in:Applied catalysis. A, General General, 2015-05, Vol.497, p.184-197
Hauptverfasser: Martinelli, Michela, Jacobs, Gary, Graham, Uschi M., Shafer, Wilson D., Cronauer, Donald C., Kropf, A. Jeremy, Marshall, Christopher L., Khalid, Syed, Visconti, Carlo G., Lietti, Luca, Davis, Burtron H.
Format: Artikel
Sprache:eng
Schlagworte:
Catalysis
Catalysts
Formates
Nanostructure
Phase shift
Platinum
Pt/YSZ
Pt/ZrO2
Surface chemistry
Surface defects
Surface mobility
Water-gas-shift
Yttrium stabilized zirconia (YSZ)
Zirconia
Zirconium dioxide
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Zusammenfassung:•YSZ supports (cubic) are more reducible than zirconia (tetragonal).•Pt promotion further facilitates reduction.•Y-doping of zirconia increases the number of surface defects (e.g., bridging OH groups).•Highest formate decomposition rate (surface O mobility) observed for 0.5%Pt/YSZ.•The activity of Pt/YSZ catalysts displays a synergy between zirconia and yttrium. Nano-scale Y-doped zirconium oxide materials were prepared with high surface areas (150–200m2/g) and small nano-crystallites (
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2014.12.055