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Citation: Li Wen, Yin Yuan-Qi, Feng Liang-Bo, Zheng Pei-Ju. Correlation Between the Catalytic Property and Zr³⁺ Ion for ZrO₂ in F-T Reaction[J]. Acta Physico-Chimica Sinica, ;1996, 12(12): 1074-1078. doi: 10.3866/PKU.WHXB19961205 shu

Correlation Between the Catalytic Property and Zr³⁺ Ion for ZrO₂ in F-T Reaction

1.
Lanzhou Institute of Chemical Physics,Chinese Academy of Science,Lanzhou 730000

Received Date: 11 March 1996
Available Online: 15 December 1996

CO hydrogenation was studied over zirconia catalysts. The catalysts, which were classed into three types of samples-the fresh, used and specially treated catalysts, were characterized by means of EPR spectroscopy. A strong signal at g⊥=1 .976 and g||=1.961, which was assigned to Zr3+ ion on the surface of ZrO2, was observed for the fresh catalysts. In contrast, unique strong and sharp signal at g=2.0024, which was assigned to dissociated H atom, also was observed for the used catalysts. Further verification of the assignments was carried out by EPR characterization of the specially treated catalysts. These results show that Zr3+ ion might involve in CO hydrogenation. Quantitative studies reveal that there is a close linear relation between Zr3+ ion and the selectivity to isobutene for the reaction over ZrO2. Finally, a possible mechanism of the catalytic reaction via a surface species Zr(Ⅲ)(CO)2 was proposed.
- EPR spectra;ZrO₂ catalyst;Zr³⁺ ion
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Correlation Between the Catalytic Property and Zr3+ Ion for ZrO2 in F-T Reaction

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通讯作者: 陈斌, bchen63@163.com

Correlation Between the Catalytic Property and Zr³⁺ Ion for ZrO₂ in F-T Reaction