Redox Properties of Fe-Promoted Cu/Al<sub>2</sub>O<sub>3</sub> Catalysts Active for Water–Gas-Shift Reaction

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Author(s)

    • Sagata Kunimasa
    • Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University|Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University
    • Yahiro Hidenori
    • Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University|Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University

Abstract

FeO<i><sub>x</sub></i>-promoted Cu/Al<sub>2</sub>O<sub>3</sub> catalysts active for low-temperature water–gas-shift (LT-WGS) reaction, reported previously (H. Yahiro, K. Sagata, T. Yamamoto, K. Saiki, M. Asamoto, H. Yamaura, <i>Catal. Lett.</i> <b>2008</b>, <i>124</i>, 233.), were characterized by TPR, TPO, XRD, and XPS measurements. These techniques proved that Fe<sub>2</sub>O<sub>3</sub> was partially reduced by H<sub>2</sub> to Fe<sub>3</sub>O<sub>4</sub> at 573 K in the presence of Cu<sup>0</sup> and that the obtained Fe<sub>3</sub>O<sub>4</sub> was reoxidized by O<sub>2</sub> at the same temperature. The pronounced effect of Fe addition to Cu/Al<sub>2</sub>O<sub>3</sub> on the catalytic activity for WGS reaction was observed at 523–623 K. It is concluded that partially reduced Fe<sub>2</sub>O<sub>3</sub>, probably Fe<sub>3</sub>O<sub>4</sub>, acts as an active site for LT-WGS reaction in the addition to Cu<sup>0</sup>, resulting in the improvement of the catalytic activity at 523–623 K.

Journal

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 85(4), 511-516, 2012

    The Chemical Society of Japan

Codes

  • NII Article ID (NAID)
    130004153049
  • Text Lang
    ENG
  • ISSN
    0009-2673
  • Data Source
    J-STAGE 
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