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《Journal of Molecular Catalysis》 2014-01
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Preparation and Application of Core-shell Pt/TiO_2 Catalyst for Ammonia Oxidation Process

XU Xiao-bo;PU Xue-ling;YUAN Shao-jun;JIANG Wei;LIANG Bin;Colleage of chemical engineering and technology;  
Titanium dioxide is an excellent photocatalyst,which can be utilized to load pure metal on its surface with photocatalytic reduction deposition process. In this study,pure metallic platinum was loaded on the surface of TiO2particles with UV light irradiation to construct Pt / TiO2catalyst for ammonia oxidation process. The Pt loading of catalyst is decreased to about 0. 2 gPt/ gTiO 2,ant specific surface area is as large as 10 m2/ g. With such catalyst, the ammonia conversion in ammonia oxidation process can reach 100% at 600 ~ 700 ℃,which is lower than the application temperature in present nitric acid industry,800 ~ 900 ℃,and the sublimation temperature of PtO2,850 ℃. Furthermore,there is no platinum loss and reaction active reduction of catalysts for 400 hours' continuous running. Therefore,this Pt / TiO2catalyst has exhibits a valuable application prospect of precious metal in nitric acid industry.
【Fund】: 国家自然科学基金资助(21176157)
【CateGory Index】: O643.36;TQ111.2
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