【摘要】 本文采用原位博氏红外光谱技术研究了ＣｅＯ２表面的吸附性能及变换反应机理。不同温度下吸附水的结果表明，表面物理吸附水随温度升高逐渐减少。吸附二氧化碳结果表明催化剂表面低温下可以形成单齿状碳酸盐吸附物种，随温度升高此物种逐渐转化为表面碳酸基吸附物种。吸附一氧化碳结果表明表面出现了极少量的甲酸基物种，据此可认为ＣｅＯ２表面存在微量的表面羟基。随表面温度升高甲酸基物种转化为碳酸基吸附物种。共吸附Ｈ２Ｏ＋ＣＯ结果表明ＣｅＯ２表面在此气氛中可形成大量的甲酸基物种，高温时转化为碳酸基吸附物种。综合研究结果，归纳出了变换反应机理。更多还原

【Abstract】 The adsorptivity of water.carbon monoxide and carbon dioxide on the surface ofceriurn oxide has been studied by in situ Fourier-transform infrared spectroscopy（FT-IR）attemperatures ranging from r.t.to 673K,Monodentate carbonates were formed by adsorption ofcarbon dioxide at lower temperature,then unidentate formate species were observed at higher tem-perature. The formate species were formed by the reaction of CO with the surface hydroxyls ofCeO₂ at moderate temperature,The formate species can be decomposed at higher temperature,andthen formed unidentate formate species. The results show that the decomposition of unidentateformate species controls the WGSR on the surface of CeO₂.更多还原