[25p-P03-1~7] 6.6 プローブ顕微鏡

▲ [25p-P03-6] Water Molecule and Hydroxyl Adsorption Properties Research on TiO₂(110) Surface

〇(D)Qiang Zhu¹、Yasuhiro Sugawara¹、Yanjun Li¹ (1.Osaka Univ)

キーワード：H2O, hydroxyl, AFM/KPFM

The study of adsorption and bonding properties of hydrogen species on metal oxide semiconductor surfaces and interfaces are important for the understanding of catalytic reactions. Surface charge distribution and polaron formation are also affected by these species. In this work, we combined atomic force microscopy and Kelvin probe force microscopy techniques to distinguish H₂O, hydroxyl (at titanium rows are OH_t, at bridging oxygen rows are OH_b) on the rutile TiO₂(110) surface at 78 K. More importantly, we manipulated water molecule and hydroxyl to hop across different rows for the designing of the effective reactions based semiconductor catalysis. Our result pave the way to identify and operate the surface hydroxyl species, which is the basis for understanding the mechanism of surface catalysis.