Abstract

A Pt/WO3/TiO2 catalyst for propane oxidation was prepared by a stepwise wet impregnation method, and was aged at 800 degrees C for 5 hr. Compared to the sulfate-derived titania supported catalyst, the introduction of tungsten oxide as stable Brønsted acid sites led to the formation of more metallic platinum active sites at the Pt/WO3 interface. The dissociation of surface intermediates for propane oxidation was promoted on the WO3-modified catalyst. This, as well as the inhibition effects of tungsten oxide on the sintering of anatase and the phase transformation to rutile, resulting in a high activity and thermal stability for the Pt/WO3/TiO2 catalyst.

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Authors

Wu X, Zhou Z, Weng D, Wang B

Institution

Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. wuxiaodong@tsinghua.edu.cn

Source

Journal of environmental sciences (China) 24:3 2012 pg 458-63

MeSH

Adsorption
Air Pollutants
Ammonia
Carbon Monoxide
Catalysis
Oxidation-Reduction
Oxides
Platinum
Propane
Sulfates
Temperature
Titanium
Tungsten

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22655359