Effects of tungsten oxide on the activity and thermal stability of a sulfate-derived titania supported platinum catalyst for propane oxidation.
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.
Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. wuxiaodong@tsinghua.edu.cn
Xiaodong
X
Wu
Zhou
Z
Zhou
Duan
D
Weng
Bin
B
Wang
D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry; D000641:Ammonia / Q000737:chemistry; D002248:Carbon Monoxide; D002384:Catalysis; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D011407:Propane / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry*; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*
D000393:Air Pollutants; D010087:Oxides; D013431:Sulfates; D010984:Platinum; D000641:Ammonia; D002248:Carbon Monoxide; C511604:tungsten oxide; D014025:Titanium; D011407:Propane; D014414:Tungsten