Methane Oxidation on Perovskite-Type Ca(Mn1−xTix)O3−δ期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Methane Oxidation on Perovskite-Type Ca(Mn_1−xTi_x)O_3−δ

Authors:	Hideki Taguchi Katsuyuki Nakade Masashi Yosinaga Masaki Kato Ken Hirota

Affiliation:	The Graduate School of Natural Science and Technology (Science), Okayama University, Okayama 700-8530, Japan; Kyoto Prefecture Collaboration of Regional Entities for the Advancement of Technological Excellence, Kyoto 619-0237, Japan; Faculty of Engineering, Doshisha University, Kyo-tanabe, Kyoto 610-0321, Japan

Abstract:	X-ray photoelectron spectroscopy was performed to elucidate the catalytic activity of CH₄ oxidation on perovskite-type Ca(Mn_{1− x}Ti_x)O_3−δ synthesized at 1173 K in a flow of oxygen from a gel with citric acid and ethylene glycol. The Mn ion content decreases and the ratio of the Mn³⁺ ion in the Mn ion increases with increases in x . Ca(Mn_{1− x}Ti_x)O_3−δ has a high catalytic activity of CH₄ oxidation at x =0.4. These results indicate that the catalytic activity strongly depends on the Mn³⁺ ion content of the surface.

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