Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: effect of the strong metal-support interaction (SMSI) on the catalytic activity

Title
Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: effect of the strong metal-support interaction (SMSI) on the catalytic activity
Authors
유천재김민성정상호이명석조일형이대원이관영
Issue Date
2013-10
Publisher
Applied catalysis B, Environmental
Citation
VOL 142-361
Abstract
In this study, we prepared TiO2-supported Pd?Cu catalysts of different anatase/rutile phase compositions, which were used in a nitrate reduction in water. It was shown that the catalysts containing a greater anatase phase composition had higher catalytic performance. Through characterization studies using H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS), the observed trend of the catalytic activity was correlated to the degree of the strong metal-support interaction (SMSI) over the catalysts. The SMSI occurred through pre-treatment of the catalysts by H2 reduction (at 200 °C), which resulted in increased partially reduced TiO2?x and electron-rich active metal (Pd and Cu) states at the catalyst of higher composition of anatase phase. The relationships between the changes in the properties and activities of the catalysts as a result of the anatase phase composition are discussed.
URI
http://pubs.kist.re.kr/handle/201004/72779
ISSN
0926-3373
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