Influence of Preparation Methods on the Performance of Metal Phosphate-Supported Gold Catalysts in CO Oxidation

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Catalysis Letters

OSTI ID:1044695

Dai, Sheng ^[1]; Ma, Zhen ^[1]; Yin, Hongfeng ^[1]

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1. ORNL

The influence of different preparation methods on the performance of metal phosphate-supported gold catalysts in CO oxidation was surveyed. A series of metal phosphate-supported gold catalysts (Au/M-P-O, M = Al, Ca, Fe, Zn, La, Eu, Ho) were prepared by depositing dodecanethiol-capped gold nanoparticles on the supports, or by using Au(en){sub 2}Cl{sub 3} as the precursor, and these catalysts were tested in CO oxidation. The catalytic data were compared with the data obtained in our previous work employing catalysts prepared by deposition-precipitation (Ma et al. Catal Lett 126:20). It was found that only Au/La-P-O is always active whereas Au/Al-P-O, Au/Ca-P-O, and Au/Zn-P-O are always not particularly active, regardless of the preparation methods. These catalysts were characterized by TEM, and it was found that the size of gold nanoparticles is not the only factor that determines the activity. Both catalyst supports and preparation methods are important factors. Here we loaded gold on metal phosphates using either dodecanethiol-capped gold nanoparticles or Au(en){sub 2}Cl{sub 3} as the precursor, tested the activity in CO oxidation, and compared the catalytic results with those obtained using gold-on-phosphate catalysts prepared via deposition-precipitation.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1044695
• Journal Information: Catalysis Letters, Journal Name: Catalysis Letters Journal Issue: 1-2 Vol. 138; ISSN CALEER; ISSN 1011-372X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATALYST SUPPORTS
CATALYSTS
GOLD
OXIDATION
PERFORMANCE
PHOSPHATES
PRECURSOR