STM observation of the origin of electrochemical promotion on metal catalyst-electrodes interfaced with YSZ and β″-Al2O3 |
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| Institution: | 1. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Engineering, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, PR China;2. Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, PR China;3. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, PR China;1. Department of Physics and Astronomy, University of Nebraska, Theodore Jorgensen Hall, 855 North 16th Street, PO Box 880299, Lincoln, NE 68588-0299, USA;2. Department of Materials Science and Engineering, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, USA;3. Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, USA;4. Nebraska Center for Energy Sciences Research, 230 Whittier, 2200 Vine Street, Lincoln, NE 68583-0857, USA;1. School of Physics, Universiti Sains Malaysia (USM), 11800 Pulau, Pinang, Malaysia;2. Institute of Nano Optoelectronics Research and Technology, Universiti Sains Malaysia (USM), 11800 Pulau, Pinang, Malaysia;1. Universidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica, Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Carretera a Salinas Victoria km. 2.3, C.P. 66600 Apodaca, N.L., Mexico;2. Universidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica, Av. Universidad S/N, Cd. Universitaria, C.P. 66451 San Nicolás de los Garza, N.L., Mexico;3. Universidad Autónoma de Coahuila, Facultad de Metalurgia, Carr. 57, Km 4.5, C.P. 25710 Monclova, Coah., Mexico;1. College of Materials and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China;2. Unionlight Technology CO., LTD., Wuxi 214000, China |
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| Abstract: | Scanning tunneling microscopy (STM) was used to investigate the surfaces of Pt(111) single crystals interfaced with YSZ and β″-Al2O3 at atmospheric pressure. In both cases the STM imaged the reversible electrochemically controlled dosing (backspillover) of O2− species and of Na+ species on Pt(111) surface respectively, which both form a (12 × 12) hexagonal structure on the Pt(111) surface. On the mechanistic side, the STM has confirmed the backspillover mechanism of electrochemical promotion and metal support interactions. |
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