A Study of CO Adsorption on Zirconia Polymorphs by IR Spectroscopy
Diffuse reflectance FT-IR (DRIFT) and transmission FT-IR spectroscopy were used to investigate the effect of zirconia polymorphs on CO adsorption at different temperatures. In addition, the influence of dehydroxylation degree of zirconia polymorphs on CO adsorption at ambient temperature was also surveyed at different thermal vacuum treatments. The results showed that zirconia polymorphs exerted a great influence on CO adsorption, the formation and conversion of surface intermediates, and the active sites for CO adsorption varied with the dehydroxylation degree of zirconia polymorphs. The treatment at elevated temperature created active sites for CO adsorption which appeared in the DRIFT spectra by CO reacting with surface hydroxyls; observation in transmission FT-IR showed the active sites were produced by the thermal dehydroxylation.
Zirconia polymorphs CO adsorption FT-IR Diffuse reflectance Transmission
MA Zhong-yi YANG Cheng ZHOU Wei LI Zheng Zhao Chun WEI Wei SUN Yu-han
Research Institute of Jilin Petrochemical Company,Ltd., PetroChina, Jilin 132021, China State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, T
国际会议
第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)
成都
英文
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）