Deep oxidation of methane on particles derived from YSZ-supported Pd-Pt-(O) coatings synthesized by pulsed filtered cathodic arc

Journal Article · Fri Dec 12 00:00:00 EST 2008 · Catalysis Communication

OSTI ID:952856

Horwat, D; Endrino, J L; Boreave, A; Karoum, R; Pierson, J F; Weber, S; Anders, A; Vernoux, Ph

Methane conversion tests were performed on Pd, PdOy, Pd0.6Pt0.4Oy and Pd0.4Pt0.6Oy thin films deposited on yttria stabilized zirconia (YSZ) substrates. Pt containing films exhibited poor activity and high reducibility. As-deposited Pd and PdOy films showed good activity and transformed, during the cycling process, to particles dispersed on the YSZ substrates. The higher reaction rate of initially PdOy films was explained by a better dispersion of the catalyst. A drop of the reaction rate was observed when the temperature exceeded 735oC and 725oC for initially Pd and PdOy, respectively, which can be associated with the high-temperature reduction of PdO into Pd.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: Accelerator& Fusion Research Division
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 952856
• Report Number(s): LBNL-1718E; TRN: US200914%%127
• Journal Information: Catalysis Communication, Vol. 10, Issue 10
• Country of Publication: United States
• Language: English

Related Subjects

36
COATINGS
METHANE
OXIDATION
REACTION KINETICS
SUBSTRATES
THIN FILMS
palladium
platinum
oxide
cataysis
methan
arc