Surface photochemistry probed by two-photon photoemission spectroscopy

Surface photochemistry probed by two-photon photoemission spectroscopy
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双光子光电子能谱探测表面光化学

DOI:
10.1039/c2ee21493h
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发表时间:
2012-04
期刊:
Energy & Environmental Science
影响因子:
--
通讯作者:
Yang, Xueming
Yang, Xueming
中科院分区:
其他
文献类型:
--
作者:
Zhou, Chuanyao;Ma, Zhibo;Ma, Zhibo;Ren, Zefeng;Ren, Zefeng;Wodtke, Alec M.;Wodtke, Alec M.;Yang, Xueming;Yang, Xueming

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双光子光电发射(2PPE)已被广泛应用于研究不同类型表面和界面上的电子结构和未占据电子态的动力学。由于2PPE探测电子激发态,它应该对伴随表面化学反应的表面激发态电子结构变化敏感。因此,该方法有可能用于研究表面化学反应的动力学和动力学以及表面光催化。本文综述了时变2PPE (TD-2PPE)法在表面光化学和光催化方面的研究进展。给出了几个例子来说明该方法在探测表面光化学和光催化方面的应用,特别是在TiO2表面上甲醇的光催化方面。由于与表面光化学和表面光催化相关的许多问题都与能源和环境问题有关,因此2PPE技术在能源和环境科学的基础问题研究中具有重要的应用前景。
Two-photon photoemission (2PPE) has been widely used in the study of electronic structure and dynamics of unoccupied electronic states on different types of surfaces and interfaces. Since 2PPE probes electronically excited states, it should be sensitive to surface excited electronic structure changes that accompany surface chemical reactions. Therefore, this method could potentially be used to study the kinetics and dynamics of surface chemical reactions as well as surface photocatalysis. In this article, we briefly review recent progress made in the study of surface photochemistry and photocatalysis using the time-dependent 2PPE (TD-2PPE) method. A few examples are given to demonstrate the application of this method in probing surface photochemistry and photocatalysis, particularly photocatalysis of methanol on TiO2 surfaces. Since many problems associated with surface photochemistry and surface photocatalysis are related to energy and environmental issues, the 2PPE technique could have important applications in the study of the fundamental problems in energy and environmental sciences.
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