Effect of Pt on Co3O4 Reduction via Electrical Conductance Method

Chem. J. Chinese Universities

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Effect of Pt on Co₃O₄ Reduction via Electrical Conductance Method

XU Dong-Yan, DUAN Hong-Min, LI Wen-Zhao, GE Qing-Jie, YU Chun-Ying, XU Heng-Yong

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 11602
3, China

Received:2005-10-25 Revised:1900-01-01 Online:2006-09-10 Published:2006-09-10
Contact: XU Heng-Yong

Abstract

Abstract: The reduction features of Co₃O₄ and Pt/Co₃O₄ were studied by electrical conductivity in this paper. Combined with the TPR results, it is concluded that the presence of noble metal Pt could significantly decrease the reduction temperature of Co₃O₄. In addition, the electrical conductance ratios of Co₃O₄ and Pt/Co₃O₄under different atmospheres, which are in a consecutively changing sequence of hydrogen, oxygen and syngas, were also investigated. It is found that the cobalt oxides resulted from the oxidation of Co metal under oxygen atmosphere can be re-reduced by the syngas in the presence of Pt noble metal. Because the electrical conductance study was conducted at 493 K, which is close to the typical reaction temperature of FischerTropsch synthesis with cobalt based catalysts. It is reasonably speculated that the presence of Pt is beneficial to inhibiting the oxidation of cobalt metal during the Fischer-Tropsch synthesis, and thus eliminating the deactivation of cobalt catalyst.

Key words: Noble metal, Platinum, Co3O4, Reduction, Electrical conductance

CLC Number:

O643.2

TrendMD:

XU Dong-Yan, DUAN Hong-Min, LI Wen-Zhao, GE Qing-Jie, YU Chun-Ying, XU Heng-Yong
. Effect of Pt on Co₃O₄ Reduction via Electrical Conductance Method[J]. Chem. J. Chinese Universities, doi: .

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Effect of Pt on Co₃O₄ Reduction via Electrical Conductance Method

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