Author/Authors :
Chun، نويسنده , , Wang-Jae and Koike، نويسنده , , Yuichiro and Ashima، نويسنده , , Hidenori and Kinoshita، نويسنده , , Kumiko and Ijima، نويسنده , , Kaoru and Fujikawa، نويسنده , , Keisuke and Suzuki، نويسنده , , Shushi and Nomura، نويسنده , , Masaharu and Iwasawa، نويسنده , , Yasuhiro and Asakura، نويسنده , , Kiyotaka، نويسنده ,
Abstract :
Preparing highly dispersed monoatomic Cu species on a TiO2(1 1 0) surface was successfully achieved on a TiO2(1 1 0) surface that had been precovered with an acetic anhydride layer. Polarization-dependent total reflection fluorescence X-ray absorption fine structure (PTRF-XAFS) spectra indicated that the three-dimensional structures of the monoatomic Cu species were stabilized on the surface by two 0.196-nm-long C–O bonds, namely, Cu–O (acetate) and Cu–O (bridging surface oxygen) bonds. The Cu species diffusion was effectively blocked by the acetate species with its molecular plane perpendicular to the [0 0 1] diffusion direction created by the dissociative adsorption of acetic anhydride.
