摘要
Cyclohexane is a high-valued chemical receivingsignificant interest in liquid hydrogen storage technology.TiO_(2)-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 TiO_(2)(110).The thermal desorption spectroscopy and X-ray photoelectron spectroscopy results both demonstrate the molecular adsorption of cyclohexane on rutile TiO_(2)(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 TiO_(2)(110).These results deepen the fundamental understanding of the surface chemistry of cyclohexane on the TiO_(2)surface.
环已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TiO_(2)催化剂在温和条件下表现出优异的光催化环已烷脱氢性能,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已烷在金红石型TiO_(2)(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已烷分子在金红石型TiO_(2)(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已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已烷在TiO_(2)表面上的化学反应机理的理解.
基金
This work is supported by the National Natural Science Foundation of China(No.22202191).
