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Citation: LI Jin-Wei, ZHAN Ying-Ying, LIN Xing-Yi, ZHENG Qi. Influence of Calcination Temperature on Properties of Au/Fe₂O₃ Catalysts for Low Temperature Water Gas Shift Reaction[J]. Acta Physico-Chimica Sinica, ;2008, 24(06): 932-938. doi: 10.1016/S1872-1508(08)60039-X shu

Influence of Calcination Temperature on Properties of Au/Fe₂O₃ Catalysts for Low Temperature Water Gas Shift Reaction

1.
National Engineering Research Center of Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou 350002, P. R. China

Received Date: 23 January 2008
Available Online: 7 April 2008

Aseries ofAu/Fe2O3 catalysts for the water gas shift (WGS) reaction were prepared by modified deposition-precipitation method. The sample calcined at 300 ℃ showed higher catalytic activity and better stability than other samples. Using N2 physisorption, in situ XRD, H2-TPR, and XPS techniques, the influence of calcination temperature on properties of Au/Fe2O3 catalyst was explored, and the cause of deactivation was analyzed as well. The results showed that the catalytic behaviors were related to the interaction between Au and Fe2O3, and the reductive property of support, both of which were significantly affected by calcination temperature. Furthermore, according to the results of XPS, although stable carbonate and carbonyl surface species were found on the spent catalysts, the semiquantitative analysis of these species indicated that they were not the main cause of the deactivation. In fact, the deactivation of Au/Fe2O3 was sensitive to the structure change of support. During the water gas shift reaction, Fe3O4 particle would aggregate and crystallize leading to increase in the crystallinity of support and a significant reduction in the surface area of the catalysts, which resulted in the deactivation of Au/Fe2O3.
- Water gas shift,
- Calcination temperature,
- Deactivation,
- Au/Fe2O3 catalyst
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of Calcination Temperature on Properties of Au/Fe2O3 Catalysts for Low Temperature Water Gas Shift Reaction

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通讯作者: 陈斌, bchen63@163.com

Influence of Calcination Temperature on Properties of Au/Fe₂O₃ Catalysts for Low Temperature Water Gas Shift Reaction