Pd-Cu bimetallic catalysts supported on TiO2-CeO2 mixed oxides for aqueous nitrate reduction by hydrogen
- Authors
- Kim, Min-Sung; Lee, Dae-Won; Chung, Sang-Ho; Kim, Ji Tae; Cho, Il-Hyoung; Lee, Kwan-Young
- Issue Date
- 10월-2014
- Publisher
- ELSEVIER
- Keywords
- Nitrate reduction; Water treatment; TiO2-CeO2; Pd-Cu; Bimetallic catalyst
- Citation
- JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, v.392, pp.308 - 314
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
- Volume
- 392
- Start Page
- 308
- End Page
- 314
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/97344
- DOI
- 10.1016/j.molcata.2014.05.034
- ISSN
- 1381-1169
- Abstract
- Pd-Cu supported on TiO2-CeO2 mixed oxides (Pd-Cu/TiO2-CeO2) were tested for the reduction of nitrate ions in water. Compared with a Pd-Cu catalyst with TiO2 only as support (Pd-Cu/TiO2), which was proved to be active for this reaction in our previous study, Pd-Cu/TiO2-CeO2 showed improved activity if TiO2-CeO2 contained an appropriate amount of ceria (Ti:Ce = 18:1). Especially, the Pd-Cu/TiO2-CeO2 (Ti:Ce = 18:1) showed the initial nitrate reduction rate of 3.20 mmolimin/g(cat), eight times higher than that of Pd-Cu/TiO2 (0.41 mmol/min/g(cat)). It was supposed that the improved activity of the catalyst was attributable to the reduced surface (oxygen vacancies) of the support and zero-valence states of the active metals (including the Pd-Cu alloy) in the catalyst. (C) 2014 Elsevier B.V. All rights reserved.
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