Catalytic properties and surface states of La1−x
(Th,Sr)
x
CoO3 |
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Authors: | Kenji Tabata Shigemi Kohiki |
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Affiliation: | (1) Housing Products Research Laboratory, Matsushita Housing Products Co. Ltd, 639-11 Yamato-Koriyama, Nara, Japan;(2) Matsushita Technoresearch Inc., 570 Moriguchi, Osaka, Japan |
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Abstract: | The surface chemical states of the perovskite-type thorium- or strontium-doped lanthanum cobalt oxides (La1–x
Th
x
CoO3, La1–x
Sr
x
CoO3) have been investigated using X-ray photoelectron spectroscopy. Catalytic oxidations of CO have been also investigated by flow methods. The ionicity between cobalt and lattice oxygen was increased by substituting thorium for lanthanum, and had a peak atx = 0.02. The catalytic activity also had a peak atx = 0.02. However, the ionicity decreased for the case of strontium substitution, and the activity also decreased. |
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Keywords: | |
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