Effect of aging on the CO oxidation properties of copper manganese oxides prepared by hydrolysis–coprecipitation using tetramethyl ammonium hydroxide

Hisahiro Einaga, Akihiro Kiya

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

Copper manganese mixed oxides were prepared by a hydrolysis-coprecipitation method using tetramethyl ammonium hydroxide and calcined at 573–873 K. The effect of aging treatment after the coprecipitation process on the catalytic properties of the calcined mixed oxides for CO oxidation was investigated. XRD and EXAFS studies showed that spinel phases were mainly formed in the aged catalysts and the degree of disorder in the Cu–Mn spinel oxide phases increased. The aging treatment suppressed the formation of crystallites of mixed oxides, but the treatment promoted the crystallization of impurity CuO phase. The aged catalyst exhibited higher activity for CO oxidation than the unaged catalysts. The optimum calcination temperature for obtaining the highest activity was changed by aging treatment. Refluxing during the aging treatment led to the detrimental effect on the CO oxidation activities.

本文言語英語
ページ(範囲)521-536
ページ数16
ジャーナルReaction Kinetics, Mechanisms and Catalysis
117
2
DOI
出版ステータス出版済み - 4 1 2016

All Science Journal Classification (ASJC) codes

  • 触媒
  • 物理化学および理論化学

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