The effects of oxide supports on the low temperature hydrogenation activity of acetone over Pt/Ni bimetallic catalysts on SiO2, gamma-Al2O3 and TiO2
Low temperature (308 K) hydrogenation of acetone was used as a probe reaction to investigate the support effect on the hydrogenation activity of Pt/Ni bimetallic catalysts supported on TiO{sub 2}, SiO{sub 2} and γ-Al{sub 2}O{sub 3}. The oxide supports significantly affected the catalytic properties of Pt/Ni catalysts, in which Pt/Ni/SiO{sub 2} bimetallic catalysts exhibited significantly higher activity than the other two bimetallic catalysts. TEM measurements revealed that the three supported Pt/Ni bimetallic catalysts have similar particle size distribution, while CO chemisorption measurements showed very different chemisorption capacity. Extended X-Ray absorption fine structure (EXAFS) measurements of the Pt LIII-edge indicated that Pt atoms were fully reduced and the Pt–Ni bimetallic bonds were formed on all three catalysts. The extent of Pt–Ni bond formation followed the trend of SiO{sub 2} > γ-Al{sub 2}O{sub 3} > TiO{sub 2}, which correlated very well with the hydrogenation activity.
- Research Organization:
- Energy Frontier Research Centers (EFRC); Catalysis Center for Energy Innovation (CCEI)
- Sponsoring Organization:
- USDOE SC Office of Basic Energy Sciences (SC-22)
- DOE Contract Number:
- SC0001004
- OSTI ID:
- 1065167
- Journal Information:
- Appl. Catal. A, Journal Name: Appl. Catal. A Vol. 393
- Country of Publication:
- United States
- Language:
- English
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