Studies of TPR in situ 57Fe MBS on the Reduction Behavior of the γ-Al2O3 Supported Iron and Platinum-iron Catalysts

Chem. J. Chinese Universities ›› 1997, Vol. 18 ›› Issue (6): 958.

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Studies of TPR in situ ⁵⁷Fe MBS on the Reduction Behavior of the γ-Al₂O₃ Supported Iron and Platinum-iron Catalysts

JIA Ji-Fei¹, SHEN Jian-Yi², XU Zhu-Sheng¹, GE Xin², ZHANG Tao¹, LIN Li-Wu¹

1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023;
2. Department of Chemistry, Nanjing University, Nanjing, 210093

Received:1996-11-13 Online:1997-06-24 Published:1997-06-24

Abstract

Abstract: The reduction behavior of Y-Al₂O₃ supported iron and platinum-iron catalysts was studied by TPRcombined in situ ⁵⁷Fe MBS. The results indicated that Fe³⁺ is highly dis-persed on the Y-Al₂O₃ surface for all the samples containing iron before the reduction. No Fe⁰ was found in the reduction process. The Fe³⁺ was reduced to Fe²⁺ in tetrahedral vacancy first in Pt-Fe/Y-Al₂O₃ sample in TPRprocess. The TPRprocesses of all supported iron samples are very different from those of α-Fe₂O_3/sub>.

Key words: Fe/γ-Al₂O₃, Pt-Fe/γ-Al₂O₃, TPR, TPR in situ ⁵⁷Fe MBS

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JIA Ji-Fei, SHEN Jian-Yi, XU Zhu-Sheng, GE Xin, ZHANG Tao, LIN Li-Wu. Studies of TPR in situ ⁵⁷Fe MBS on the Reduction Behavior of the γ-Al₂O₃ Supported Iron and Platinum-iron Catalysts[J]. Chem. J. Chinese Universities, 1997, 18(6): 958.

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Studies of TPR in situ ⁵⁷Fe MBS on the Reduction Behavior of the γ-Al₂O₃ Supported Iron and Platinum-iron Catalysts

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