Surface-enhanced Raman scattering of pyridine on platinum and nickel electrodes in nonaqueous solutions |
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| Institution: | 1. Department of Chemistry, Suzhou University, 1 Shizi Street, Suzhou 215006, PR China;2. Department of Chemistry and Institute of Physical Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, PR China;1. Department of Applied Physics, Institute of Advanced Materials Physics, Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Faculty of Science, Tianjin University, Tianjin 300072, People''s Republic of China;2. Department of Physics, Tianjin Normal University, Tianjin 300387, People''s Republic of China;1. Institute of High-Temperature Electrochemistry, 620990, Ekaterinburg, 20 Academicheskaya St., Russia;2. Ural Federal University, 620002, Ekaterinburg, 19 Mira St., Russia;1. Department of Chemistry, Youngstown State University, Youngstown, OH 44555, USA;2. Instituto de Química Médica (IQM-CSIC), Juan de la Cierva, 3, E-28006 Madrid, Spain;1. Dipartimento di Fisica “G. Galilei”, Università di Padova and INFN, Sezione di Padova, Via Marzolo 8, I-35131 Padua, Italy;2. Physics and Astronomy, University of Southampton, SO17 1BJ Southampton, United Kingdom;1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China;2. China Building Materials Academy, Beijing 100024, China |
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| Abstract: | Surface-enhanced Raman scattering (SERS) spectra of pyridine adsorbed onto bare platinum and nickel electrodes in nonaqueous solutions are reported in this Letter. There are similarities and differences between the SERS from aqueous and nonaqueous solutions. The surface enhancement factor for platinum in acetonitrile solution has been calculated to decrease by a factor of ca. 10 compared with that in the aqueous media. The double-band character for the ring breathing mode is observed at 1009 and 1019 cm−1. Two adsorption modes of pyridine on the platinum surface were assumed. Part of the pyridine molecules may be chemisorbed onto the surface, with the ring plane oriented vertical to the surface; other pyridine molecules may co-adsorb with lithium cations onto the surface. |
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