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  Highly effective CuO/Fe(OH)x catalysts for selective oxidation of CO in H2-rich stream

Qiao, B., Wang, A., Lin, J., Li, L., Su, D. S., & Zhang, T. (2011). Highly effective CuO/Fe(OH)x catalysts for selective oxidation of CO in H2-rich stream. Applied Catalysis B: Environmental, 105(1-2), 103-110. doi:10.1016/j.apcatb.2011.03.040.

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 Creators:
Qiao, Botao1, Author
Wang, Aiqin1, Author
Lin, Jian1, Author
Li, Lin1, Author
Su, Dang Sheng2, Author              
Zhang, Tao1, Author
Affiliations:
1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: CuO; Fe(OH)x; CuO–Fe2O3; CO oxidation; PROX; Hydrogen purification
 Abstract: Ferric hydroxide supported copper oxide (CuO/Fe(OH)x) catalysts were prepared with a simple coprecipitation method and used for selective oxidation of CO in H2-rich gas. The effect of calcination temperatures and Cu loadings on the activity as well as the durability of the catalyst was investigated. When the calcination temperature was 200 ◦C and the Cu loading was ranging from 7.2 to 17.3 wt%, the catalyst gave the best performance with total conversion of CO achievable in a wide temperature window from 110 ◦C to 150◦C. To reveal the reason for the high activity of the catalysts, a variety of characterization techniques were employed. The results of XRD and TG–DTA indicated that the catalysts were amorphous even after being calcined at 400 ◦C, which gave rise to large surface areas. HRTEM and XPS examinations indicated that the surface copper species were Cu2O with particle size of smaller than 5 nm. In situ DRIFT and FT-IR results showed that the reduction of Cu2+ in the composite occurred even below room temperature when exposed to CO. The significant reducibility might contribute to the high activity of the catalysts.

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Language(s): eng - English
 Dates: 2011-04-122011-06-09
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.apcatb.2011.03.040
 Degree: -

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Title: Applied Catalysis B: Environmental
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 105 (1-2) Sequence Number: - Start / End Page: 103 - 110 Identifier: ISSN: 0926-3373
CoNE: https://pure.mpg.de/cone/journals/resource/954928540173