期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 154, 期 -, 页码 73-81出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2014.02.009
关键词
Formaldehyde; Catalytic oxidation; Gold; Iron oxide; Room temperature
资金
- National Natural Foundation of China [21073024, 21373037]
- Natural Science Foundation of Liaoning Province [201102034]
- Program for New Century Excellent Talents in University [NCET-07-0136]
- Fundamental Research Funds for the Central Universities [DUT12LK23]
FeOx-supported Au catalysts prepared by co-precipitation (CP) were investigated for catalytic HCHO oxidation. The applied calcination temperature was found to greatly influence both the chemical properties and microstructure of the catalysts. Characterization using XRD, H-2-TPR and XPS suggested that lower calcination temperature improves the reducibility of the catalysts, and favors the presence of surface hydroxyl groups. Consequently, an Au/FeOx catalyst calcined at 200 C afforded 100% conversion of HCHO into CO2 and H2O at room temperature and under humid air. In situ DRIFTs studies suggested that the moisture was essential for deep oxidation of the formate intermediates into CO2 and H2O, this being the rate limiting step for catalytic HCHO oxidation. (c) 2014 Elsevier B.V. All rights reserved.
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