Carbonate-Promoted Catalytic Activity of Potassium Cations for Soot Combustion by Gaseous Oxygen
Carbonate-Promoted Catalytic Activity of Potassium Cations for Soot Combustion by Gaseous Oxygen
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DOI：
10.1002/cctc.201300736
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发表时间：
2014-02-01
期刊：
影响因子：
4.5
通讯作者：
Okubo, Tatsuya
中科院分区：
文献类型：
--
作者：
Ogura, Masaru;Kimura, Riichiro;Okubo, Tatsuya
为了解固-固-气三相催化反应中的表面反应，阐明了固载碳酸钾催化碳烟燃烧的可能机理。铝硅酸盐上的钾物种对炭黑的氧气氧化反应具有很好的催化性能。铝硅酸盐有助于稳定表面上的碱性阳离子。碳酸根离子通过向气态氧提供活性电子，在提高催化剂性能方面起着关键作用。据我们所知，这是第一份关于碳酸盐对碱性阳离子氧化反应催化活性的重要作用的报告，尽管碳酸盐（二氧化碳）被广泛认为会阻碍碱性化合物对碱催化反应的催化性能。
The possible mechanism of soot combustion catalyzed by potassium carbonate loaded on aluminosilicate was elucidated to understand the surface reaction in solid-solid-gas triphasic catalysis. Potassium species on aluminosilicate showed high catalytic performance for the oxidation of carbon black by gaseous oxygen. Aluminosilicate helped in stabilizing the alkali cation on the surface. The carbonate ion played a critical role in enhancing the catalytic performance by acting as a supplier of active electrons to gaseous oxygen. To the best of our knowledge, this is the first report on the essential role of carbonate on the catalytic activity of an alkali cation for an oxidation reaction, although carbonate (carbon dioxide) is widely recognized to hinder the catalytic performance of the alkali compound for base-catalyzed reactions.