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

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons22148

Su,  Dang Sheng
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Zitation

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.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-3BCF-0
Zusammenfassung
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.