Citation: ZHU Yi, WANG Jian-Li, CHEN Yong-Dong, LIAO Chuan-Wen, WANG Shi-Dan, NG Mao-Chu, CHEN Yao-Qiang. Catalytic Combustion of Diesel Soot over Ce_0.5+xZr_0.4-xLa_0.1O₂-Al₂O₃ Catalysts[J]. Acta Physico-Chimica Sinica, ;2011, 27(04): 925-931. doi: 10.3866/PKU.WHXB20110343 shu

Catalytic Combustion of Diesel Soot over Ce_0.5+xZr_0.4-xLa_0.1O₂-Al₂O₃ Catalysts

1.
College of Chemistry, Sichuan University, Chengdu 610064, P. R. China

Received Date: 20 October 2010
Available Online: 23 February 2011
Fund Project: 国家自然科学基金(20773090) (20773090)教育部博士点基金(20080610009)资助项目 (20080610009)

Ce_0.5+x Zr_0.4-x La_0.1O₂-Al₂O₃ catalysts were prepared by co-precipitation, where 0≤x≤0.4 and the mass ratio of Ce_0.5+xZr_0.4-xLa_0.1O₂:Al₂O₃ was 1:1. The catalytic activities of these catalysts for the catalytic combustion of diesel soot were investigated. The catalysts were further characterized by low temperature nitrogen adsorption-desorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), H₂- temperature-programmed reduction (H₂-TPR), and O₂-temperature-programmed desorption (O₂-TPD). The results showed that all the catalysts formed solid solutions with a fluorite-like structure. When x=0.2, the Ce³⁺ ions were partly rich on the surface of the catalyst. The catalyst was easily reduced by H₂ and the desorption peak area of the β oxygen species was the largest. The light-off temperature was 360 °C for the catalytic combustion of diesel soot over the catalyst suggesting od catalytic activity and potential application in diesel soot catalytic combustion.
- Solid solution,
- Soot,
- Diesel,
- Catalytic combustion
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Catalytic Combustion of Diesel Soot over Ce_0.5+xZr_0.4-xLa_0.1O₂-Al₂O₃ Catalysts