Strong electronic promotion of Co₃O₄ towards N₂O decomposition by surface alkali dopants

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• 作者：Paweł ; Stelmachowski ; Gabriela Maniak ; Andrzej Kotarba ; Zbigniew Sojka
• 关键词：Cobalt spinel ; Co₃O₄ ; N₂O decomposition ; Work function ; Alkali doping
• 刊名：Catalysis Communications
• 出版年：2009
• 出版时间：10 March 2009
• 年：2009
• 卷：10
• 期：7
• 页码：1062-1065
• 全文大小：356 K

文摘

The effect of alkali promoters on N₂O decomposition in dry and wet (1 % H₂O) conditions over Co₃O₄ was investigated. The beneficial influence of dopants on the catalyst activity increases in the order: Li  Na < K < Cs. The N₂O reactivity was complemented by the work function measurements by Kelvin method. The strong promotional effect for sodium, potassium and cesium was found to be of electronic nature and was discussed in terms of lowering of the spinel work function caused by the surface alkali adspecies.