Infrared spectroscopic study of the methanol adsorbates at a platinum electrode: Part II. The Pt (100) surface in an acid medium |
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| Institution: | 1. School of Chemistry & Environmental Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, PR China;2. Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028000, PR China;1. School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore;2. Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Avenue, Block S2-B3a-01, Singapore 639798, Singapore;3. Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore |
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| Abstract: | The dissociative chemisorption of methanol at a platinum electrode in an acid medium has been studied by electrochemically modulated infrared reflectance spectroscopy and leads to the formation of several adsorbates, depending on the electrode potential and the surface structure.In this part of the series, three types of adsorbate were identified on a well-defined Pt (100) surface: linearly bonded CO, bridge-bonded CO and a third species which is likely to have a carbonyl CO bond. These three species are potential-dependent, but, conversely to polycrystalline platinum, they coexist on the Pt (100) surface at all bulk concentrations of methanol, in the range 5 × 10−4 to 5 M. |
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