Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2008, Vol. 29 ›› Issue (12): 1231-1236.

• Articles • Previous Articles     Next Articles

Microcalorimetric and FT-IR Studies of CO Adsorption on Supported Iridium Catalysts

WANG Xingtang1,2, LI Lin1, HUANG Yanqiang1, WANG Xiaodong1*, ZHANG Tao1*   

  1. 1 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-12-25 Online:2008-12-25 Published:2012-09-20

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Abstract: For Ir/Al2O3, a pair of bands assigned to gem-dicarbonyl species adsorbed o n Irδ+ were overlapped with a carbonyl band due to linear species on Ir 0. The adsorption heat could be the average heat produced by the formation of both gem-dicarbonyl and linear species. For Ir/SiO2, several bands ranged in 2100-2000 cm-1 were identified and attributed to the linearly bonded CO to larger and smaller Ir0 clusters.