Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: Effect of the strong metal-support interaction (SMSI) on the catalytic activity
- Authors
- Kim, Min-Sung; Chung, Sang-Ho; Yoo, Chun-Jae; Lee, Myung Suk; Cho, Il-Hyoung; Lee, Dae-Won; Lee, Kwan-Young
- Issue Date
- 10월-2013
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Nitrate reduction; SMSI; Pd-Cu/TiO2; H-2-TPR; XPS
- Citation
- APPLIED CATALYSIS B-ENVIRONMENTAL, v.142, pp.354 - 361
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED CATALYSIS B-ENVIRONMENTAL
- Volume
- 142
- Start Page
- 354
- End Page
- 361
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/102083
- DOI
- 10.1016/j.apcatb.2013.05.033
- ISSN
- 0926-3373
- 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 H-2-temperature programmed reduction (H-2-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 H-2 reduction (at 200 degrees 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. (c) 2013 Elsevier B.V. All rights reserved.
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