Wu Longxia, Fu Cong, Huang Weixin
Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China.
Phys Chem Chem Phys. 2020 May 14;22(18):9875-9909. doi: 10.1039/c9cp07001j. Epub 2020 May 4.
Chemical reactions catalyzed under heterogeneous conditions have recently expanded rapidly from traditional thermal catalysis to photocatalysis due to the rising concerns about sustainable development of energy and the environment. Adsorption of reactants on catalyst surfaces, subsequent surface reactions, and desorption of products from catalyst surfaces occur in both thermal catalysis and photocatalysis. TiO catalysts are widely used in thermal catalytic and photocatalytic reactions. Herein we review recent progress in surface chemistry, thermal catalysis and photocatalysis of TiO model catalysts from single crystals to nanocrystals with the aim of examining if the surface chemistry of TiO can bridge the fundamental understanding between thermal catalysis and photocatalysis. Following a brief introduction, the structures of major facets exposed on TiO catalysts, including surface reconstructions and defects, as well as the electronic structure and charge properties, are firstly summarized; then the recent progress in adsorption, thermal chemistry and photochemistry of small molecules on TiO single crystals and nanocrystals is comprehensively reviewed, focusing on manifesting the structure-(photo)activity relations and the commonalities/differences between thermal catalysis and photocatalysis; and finally concluding remarks and perspectives are given.
由于对能源和环境可持续发展的日益关注，非均相条件下催化的化学反应最近已从传统的热催化迅速扩展到光催化。热催化和光催化过程均包括反应物在催化剂表面的吸附、随后的表面反应以及产物从催化剂表面的解吸。TiO催化剂广泛应用于热催化和光催化反应。本文综述了从单晶到纳米晶的TiO模型催化剂在表面化学、热催化和光催化方面的最新进展，旨在探讨TiO的表面化学能否在热催化和光催化的基本理解之间架起桥梁。在简要介绍之后，首先总结了TiO催化剂上暴露的主要晶面的结构，包括表面重构和缺陷，以及电子结构和电荷性质；然后全面综述了小分子在TiO单晶和纳米晶上的吸附、热化学和光化学的最新进展，重点阐述结构-（光）活性关系以及热催化和光催化之间的共性/差异；最后给出总结和展望。
