Activation process of CuY zeolite catalyst observed by TPR and EXAFS measurements.

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概要

• 論文の詳細を見る

• EXAFS measurements have been employed to investigate structural changes of Cu species in Y-zeolite during TPR process. The formation of an active species by a consecutive reduction-reoxidation treatment was clearly demonstrated in the TPR spectra. Detailed analysis of the EXAFS data suggested that at a considerably low temperature the active species was reduced directly to Cu metal with a particle size of 5–8 Å, while at higher temperatures the original Cu<SUP>2+</SUP> ions were reduced by a two-step mechanism, via Cu<SUP>+</SUP> ions to Cu metal. From these points of view, the active species is considered to be small clusters of CuO with several Cu atoms.

• 公益社団法人 日本化学会の論文

著者

• TANABE Shuji

  Department of Materials Science and Engineering, Faculty of Engineering, Nagasaki University

• Matsumoto Hiroshige

  Department Of Applied Chemistry Faculty Of Engineering Kyushu University

• Matsumoto Hiroshige

  Department of Chemistry, Faculty of Liberal Arts, Nagasaki University

• Tanabe Shuji

  Department of Chemistry, Faculty of Liberal Arts, Nagasaki University

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• Activation process of CuY zeolite catalyst observed by TPR and EXAFS measurements.

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