Recent progress in surface NMR-electrochemistry

摘要: NMR spectroscopy is one of the newer spectroscopic techniques for investigating static, dynamic and electronic structures of molecules adsorbed onto metal catalyst surfaces. We review recent progress in application solid-state methods to the investigation molecules surfaces an electrochemical environment: presence electrolyte, at an electrified interface under external potentiostatic control. While at a very early stage development, NMR-electrochemistry approach has considerable potential for investigating otherwise inaccessible aspects electrode adsorbate structure, should enable a comparison results obtained from different spectroscopies, in particular IR spectroscopy. present a brief the development subject, followed by details instrumentation necessary studies. show how spin–spin relaxation can give information on surface structure and diffusion, how spin–lattice give information conduction electron spillover the adsorbate, species responds an externally applied electric field. The 13 C-NMR CO Pt in an electrochemical environment compared with the Pt catalysts vacuum, which are well characterized. In case CN Pt, we large spectral shifts of resonance as varied, providing an independent measurement effects electrified on the chemisorption bond. Spectral sensitivity also now adequate to observe nuclei produce even weaker signals than 13 C, such 15 N. method thus opens up a broad new array possibilities probing static (from T 2 ), diffusion (from temperature dependence T 2 ) well properties of bond l , from electrode effects) interfaces, for studying reactive intermediates poisons high-surface-area catalysts, such those utilized hydrogen organic fuel cells.