Pd-Dispersed CeO₂ Catalyst Prepared from Dealloying the Pd–Ce–Al Ternary Amorphous Alloy Used for Oxidation Reaction

• Nozaki Ai

  Department of Chemical Engineering and Materials Science Graduate School of Engineering, University of Hyogo

• Deguchi Ryo

  Department of Chemical Engineering and Materials Science Graduate School of Engineering, University of Hyogo

• Ichiwara Hiroshi

  Department of Chemical Engineering and Materials Science Graduate School of Engineering, University of Hyogo

• Kameo Ryota

  Department of Chemical Engineering and Materials Science Graduate School of Engineering, University of Hyogo

• Morishita Masao

  Department of Chemical Engineering and Materials Science Graduate School of Engineering, University of Hyogo

Bibliographic Information

Other Title

• Pd-Dispersed CeO₂ Catalyst Prepared from Dealloying the Pd-Ce-Al Ternary Amorphous Alloy Used for Oxidation Reaction

Abstract

The relationship between preparation method and the catalytic activity as well as reusability for Pd–CeO₂ catalyst was investigated. Pd-dispersed CeO₂ prepared from dealloying in NaOH aqueous solution of a Pd–Ce–Al ternary amorphous alloy as a precursor. The dealloying proceeded by active dissolution of Al and Ce to form sodium aluminate ion, Na[Al(OH₄)](aq), and CeO₂ particles, respectively. At the same time, Pd acting as cathode resulted in directly to be metallic nailed-particles exposing partly from the matrices of the CeO₂ particles. Its catalytic activity and reusability as a function of its surface area of exposed-Pd as well as sample surface area were investigated, compared with those of Pd-supported CeO₂ which was prepared by conventional liquid phase reduction. Pd-dispersed CeO₂ was higher in exposed Pd surface area than Pd-supported CeO₂ despite its lower sample surface area. It is likely that the nailed Pd on the CeO₂ prevents themselves from aggregation during sample preparation and reusability study. As a result, in the oxidation reaction of methyl benzyl alcohol, Pd-dispersed CeO₂ showed higher catalytic activity and reusability than Pd-supported CeO₂. The oxidation reaction of methyl benzyl alcohol is a measure of the oxidative decomposition reaction of harmful substances. Pd-dispersed CeO₂ is expected to be widely used for the oxidative decomposition reaction of harmful substances.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 61 (9), 1848-1852, 2020-09-01

  The Japan Institute of Metals and Materials

Keywords

• cerium oxide
• nanoporous metal oxide
• palladium

Details

• CRID: 1390285300184106368
• NII Article ID: 130007890378
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mt-m2020139
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 030599907
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I030599907
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/61/9/61_MT-M2020139/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed