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Alkali-Metal-Promoted Pt/TiO2 Opens a More Efficient Pathway to Formaldehyde Oxidation at Ambient Temperatures

Authors


  • The authors appreciate the valuable advices of Emeritus Prof. Ken-ichi Tanaka of Tokyo University and the aberration-corrected HAADF/STEM tests performed by Dr. David Bell of the School of Engineering and Applied Sciences, Harvard University. This work was supported by the National Natural Science Foundation of China (50921064 and 21077117), the Program of the Ministry of Science and Technology of China (2010AA064905), the Photon Factory, KEK (Japan) (2009G177), and the BL14W1 beam line, Shanghai Synchrotron Radiation Facility. Work at Tufts University was supported by the U.S. Department of Energy (DOE)/Basic Energy Sciences (BES) Grant No. DE-FG02-05ER15730.

Abstract

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Addition of alkali metal ions significantly promotes the activity of the Pt/TiO2 catalyst for the HCHO oxidation reaction by stabilizing an atomically dispersed Pt-O(OH)x alkali metal species and opening a new low-temperature reaction pathway. The atomically dispersed Na-Pt-O(OH)x species can effectively activate H2O and catalyze the facile reaction between surface OH and formate species to total oxidation products.

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