Abstract
A facile procedure was carried out to prepare macroporous perovskite-type complex oxide catalysts of La 1– x K x Co 1– y Fe y O 3 ( x=0, 0.1, y=0, 0.1) by using the combined method of organic ligation and solution combustion. This method could ensure the formation of the desired macroporous structures and the desired crystal phases of the prepared catalysts. It was found that the macroporous catalysts showed higher catalytic activities for soot combustion than that of the corresponding nanometric samples, and the macroporous catalyst La 0.9K 0.1CoO 3 was the best candidate catalyst for soot combustion, the activity of which was as good as supported Pt catalysts.
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