【摘要】 环己烷是液态氢存储技术中一种高价值的化学品,受到广泛关注.近期有研究报道TiO₂催化剂在温和条件下表现出优异的光催化环己烷脱氢性能,但是其详细反应机理并不清楚.本文运用表面科学方法研究了环己烷在金红石型TiO₂ （110）表面的吸附和表面化学行为.程序升温热脱附谱和X射线光电子能谱结果表明环己烷分子在金红石型TiO₂ （110）表面以分子形式吸附.在UV汞灯光照下,单层和多层吸附的环己烷均发生光诱导脱附,而没有发生光分解和脱氢反应.这些结果加深了我们对环己烷在TiO₂表面上的化学反应机理的理解.更多还原

【Abstract】 Cyclohexane is a high-valued chemical receiving significant interest in liquid hydrogen storage technology.TiO₂-based catalysts show high performance in the photocatalytic dehydrogenation of cyclohexane under mild conditions,but the detailed reaction mechanism is not well understood.With the surface science approaches,we have studied the adsorption and surface chemistry of cyclohexane on rutile TiO₂（110）.The thermal desorption spectroscopy and X-ray photoelectron spectroscopy results both demonstrate the molecular adsorption of cyclohexane on rutile TiO₂（110）.Upon the UV Hg light irradiation,photodesorption of cyclohexane occurs from both the chemisorbed monolayer and the multilayer.No decomposition nor dehydrogenation of cyclohexane occurs on rutile TiO₂（110）.These results deepen the fundamental understanding of the surface chemistry of cyclohexane on the TiO₂ surface.更多还原