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Promotional effect of cobalt addition on catalytic performance of Ce0.5Zr0.5O2 mixed oxide for diesel soot combustion

Zhang, Yan-Hua ; Zhang, Hai-Long ; Cao, Yi ; Yang, Yi ; Xu, Bao-Qiang ; Zhao, Ming ; Gong, Mao-Chu ; Xu, Hai-Di ; Chen, Yao-Qiang

Chemical papers, 2016-10, Vol.70 (10), p.1370-1379 [Periódico revisado por pares]

Cham: Springer International Publishing

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  • Título:
    Promotional effect of cobalt addition on catalytic performance of Ce0.5Zr0.5O2 mixed oxide for diesel soot combustion
  • Autor: Zhang, Yan-Hua ; Zhang, Hai-Long ; Cao, Yi ; Yang, Yi ; Xu, Bao-Qiang ; Zhao, Ming ; Gong, Mao-Chu ; Xu, Hai-Di ; Chen, Yao-Qiang
  • Assuntos: Biochemistry ; Biotechnology ; catalytic performance ; Chemistry ; Chemistry and Materials Science ; Chemistry/Food Science ; diesel soot combustion ; Industrial Chemistry/Chemical Engineering ; Materials Science ; Medicinal Chemistry ; Original Paper
  • É parte de: Chemical papers, 2016-10, Vol.70 (10), p.1370-1379
  • Descrição: A series of Co-modified Ce 0.5 Zr 0.5 O 2 catalysts with different concentrations of Co (mass %: 0, 2, 4, 6, 8, 10) was investigated for diesel soot combustion. Ce 0.5 Zr 0.5 O 2 was prepared using the coprecipitation method and Co was loaded onto the oxide using the incipient wetness impregnation method. The activities of the catalysts were evaluated by thermogravimetric (TG) analysis and temperature-programmed oxidation (TPO) experiments. The results showed the soot combustion activities of the catalysts to be effectively improved by the addition of Co, 6 % Co/Ce 0.5 Zr 0.5 O 2 and that the 8 % Co/Ce 0.5 Zr 0.5 O 2 catalysts exhibited the best catalytic performance in terms of lower soot ignition temperature ( T i at 349°C) and maximal soot oxidation rate temperature ( T m at 358°C). The reasons for the improved activity were investigated by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), H 2 temperature-programmed reduction (H 2 -TPR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). These results revealed that the presence of Co could lower the reduction temperature due to the synergistic effect between Co and Ce, thereby improving the activity of the catalysts in soot combustion. The 6 % Co catalyst exhibited the best catalytic performance, which could be attributed to the greater amounts of Co 3+ and surface oxygen species on the catalyst.
  • Editor: Cham: Springer International Publishing
  • Idioma: Inglês;Alemão;Russo;Eslovaco
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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