Pd-Au/SiO{sub 2}: Characterization and catalytic activity
- Institute of Physial Chemistry of the Polish Academy of Sciences, Warsaw (Poland)
A series of Pd-Au/SiO{sub 2} catalysts was prepared by incipient wetness coimpregnation of silica with respective chloride solutions, followed by calcination in air and reduction in hydrogen at 380{degrees}C for 15 H. A variety of techniques, chemisorption of hydrogen and carbon monoxide, temperature-programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy, and neopentane conversion as a catalytic probe, were employed to characterize metal dispersion and interaction between two metal components and the support. It has been discovered that the prepared materials are not uniform: a palladium-rich phase of very high metal dispersion (particle size {approximately}1.3 nm) coexists with much less dispersed gold-rich phase (particle size {approximately}15 nm). X-ray photoelectron spectroscopy revealed some presence of Si{sup
- OSTI ID:
- 75794
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 151; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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