Copper ionic pairs as possible active sites in N₂O decomposition on CuO_x/CeO₂ catalysts

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• 作者：Andrzej Adamski ; Wojciech Zaj?c ; Filip Zasada ; Zbigniew Sojka
• 关键词：CuOx/CeO2 ; Ionic pairs ; N2O decomposition ; EPR ; DFT
• 刊名：Catalysis Today
• 出版年：2012
• 出版时间：15 September, 2012
• 年：2012
• 卷：191
• 期：1
• 页码：129-133
• 全文大小：717 K

文摘

Synthesized by impregnation and coprecipitation methods, ceria-supported copper samples were tested in catalytic decomposition of N₂O (deN₂O) under dry and wet conditions. Basing on the structural (XRD, SEM), spectroscopic (EPR, RS) and catalytic characterization, supported by DFT calculations, the role of mono- and dimeric copper as active centers in the deN₂O reaction was evaluated. Particular attention was paid to elucidation of the structure and localization of the Cu²⁺Cu²⁺ pairs within the CeO₂ matrix, their stability and chemical conditions of their formation.