Pd/K/Co-oxide catalyst for water gas shift

Eugene Kono, Sakurako Tamura, Keisuke Yamamuro, Shuhei Ogo, Yasushi Sekine*

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Various Co3 O4 catalysts were investigated for the water gas shift (WGS) reaction for hydrogen production. Although the catalyst supporting only palladium (Pd/Co3 O4) showed low catalytic activity and higher selectivity to methanation, Pd/K/Co3 O4catalyst, with loading of potassium exceeding 0.78 wt%, showed high catalytic activity for the WGS reaction. Catalysts on which Pd and K exist closely showed high activity, as confirmed using various preparation methods. Results of XPS measurements for Pd/K/Co3 O4 revealed that supported potassium donated electrons to Pd and Co. The state of CO adsorption species was affected by the potassium loading, resulting in high catalytic activity for the Pd/K/Co3 O4 catalyst. These effects gave the Pd/K/Co3 O4 catalyst high catalytic activity for the WGS reaction. That reaction over Pd/K/Co3 O4 proceeds via surface cobalt carbonyl and then formate intermediates, as revealed by the TG and isotope exchange measurements using H218O and DRIFT.

本文言語English
ページ(範囲)247-254
ページ数8
ジャーナルApplied Catalysis A: General
489
DOI
出版ステータスPublished - 2015 1 1

ASJC Scopus subject areas

  • 触媒
  • プロセス化学およびプロセス工学

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