Effects of metal cation doping in CeO2 support on catalytic methane steam reforming at low temperature in an electric field

Ayako Takahashi, Reona Inagaki, Maki Torimoto, Yudai Hisai, Taku Matsuda, Quanbao Ma, Jeong Gil Seo, Takuma Higo, Hideaki Tsuneki, Shuhei Ogo, Truls Norby, Yasushi Sekine

Research output: Contribution to journalArticle

Abstract

Catalytic methane steam reforming was conducted at low temperature using a Pd catalyst supported on Ce1-xMxO2 (x = 0 or 0.1, M = Ca, Ba, La, Y or Al) oxides with or without an electric field (EF). The effects of the catalyst support on catalytic activity and surface proton hopping were investigated. Results show that Pd/Al-CeO2 (Pd/Ce0.9Al0.1O2) showed higher activity than Pd/CeO2 with EF, although their activity was identical without EF. Thermogravimetry revealed a larger amount of H2O adsorbed onto Pd/Al-CeO2 than onto Pd/CeO2, so Al doping to CeO2 contributes to greater H2O adsorption. Furthermore, electrochemical conduction measurements of Pd/Al-CeO2 revealed a larger contribution of surface proton hopping than that for Pd/CeO2. This promotes the surface proton conductivity and catalytic activity during EF application.

Original languageEnglish
Pages (from-to)14487-14492
Number of pages6
JournalRSC Advances
Volume10
Issue number25
DOIs
Publication statusPublished - 2020 Apr 8

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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    Takahashi, A., Inagaki, R., Torimoto, M., Hisai, Y., Matsuda, T., Ma, Q., Seo, J. G., Higo, T., Tsuneki, H., Ogo, S., Norby, T., & Sekine, Y. (2020). Effects of metal cation doping in CeO2 support on catalytic methane steam reforming at low temperature in an electric field. RSC Advances, 10(25), 14487-14492. https://doi.org/10.1039/d0ra01721c