Surface-enhanced IR absorption spectroscopy in attenuated-total reflection（ATR-SEIRAS） configuration was extended for the first time to a cadmium electrode with the adsorption of pyridine as the model system. The SE...Surface-enhanced IR absorption spectroscopy in attenuated-total reflection（ATR-SEIRAS） configuration was extended for the first time to a cadmium electrode with the adsorption of pyridine as the model system. The SEIRAS active Cd film electrode was prepared by electrodeposition of Cd mulitlayers onto a underlying Au nanofilm on Si in 0.01 mol/L CdSO 4 +0.1 mol/L KClO 4. The morphology of the as-prepared Cd film exhibits an island structure. In the potential range of -1.2 to -0.8 V（vs. SCE）, only in-plane vibrations belonging to the A1 symmetry were detected whereas those to the B1 symmetry virtually were not, suggesting that pyridine coordinates vertically or at a little angle to the Cd electrode surface via its nitrogen end without edge-tilted rotation of its ring plane. The Py adsorption configuration is closed to that found on a Au electrode, but different from that on a Ni or Pt electrode, which may be assigned to different structures of valence electron shells for the substrate metals.展开更多
文摘Surface-enhanced IR absorption spectroscopy in attenuated-total reflection（ATR-SEIRAS） configuration was extended for the first time to a cadmium electrode with the adsorption of pyridine as the model system. The SEIRAS active Cd film electrode was prepared by electrodeposition of Cd mulitlayers onto a underlying Au nanofilm on Si in 0.01 mol/L CdSO 4 +0.1 mol/L KClO 4. The morphology of the as-prepared Cd film exhibits an island structure. In the potential range of -1.2 to -0.8 V（vs. SCE）, only in-plane vibrations belonging to the A1 symmetry were detected whereas those to the B1 symmetry virtually were not, suggesting that pyridine coordinates vertically or at a little angle to the Cd electrode surface via its nitrogen end without edge-tilted rotation of its ring plane. The Py adsorption configuration is closed to that found on a Au electrode, but different from that on a Ni or Pt electrode, which may be assigned to different structures of valence electron shells for the substrate metals.
基金Supported by the National Nature Foundation of China(21175001,21375001)the Program for New Century Excellent Talents in University(China NECT-07-0002)+2 种基金Doctoral Program Foundation of the Ministry of Education of Chinathe Foundation of Scientific Innovation Team of Anhui Province(2006KJ007TD)the"211 Project"of Anhui University
