摘要
利用傅立叶变换红外光谱技术(FT-IR)考察了CO2和CO2+H2在不同形态氧化锆上的吸附和转化行为,结果表明,氧化锆的形态影响CO2的吸附形式和表面物种的生成.无定型氧化锆上主要生成碳酸氢盐和离子碳酸盐,单斜氧化锆上还出现了双齿碳酸盐,而在四方氧化锆上出现最强的线式吸附CO2,并生成聚碳酸盐.在氢气存在的条件下,单斜氧化锆上生成甲烷而在四方氧化锆上则生成甲酸盐.
The adsorption behaviors of CO2 and CO2 + H-2 on zirconia polymorphs were investigated by FT-IR technique. The results showed that absorbed CO2 and surface intermediates varied with zirconia polymorphs. Bicarbonate and ion carbonate species were detected on amorphous zirconia. In addition to the two species, bidented carbonate was also formed on monoclinic zirconia. The strongest adsorbed CO2 and polydentate carbonate species were found on tetragonal zirconia. In the case of CO2 hydrogenation, methane was formed on monoclinic zirconia while formate species was observed on tetragonal zirconia.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2005年第2期225-228,共4页
Acta Physico-Chimica Sinica
基金
国家基础重大项目计划(G1999022400)
中科院知识创新工程(KGCX2-302)资助项目~~
