Abstract
Cyclic voltammetry, scanning tunneling microscopy (STM), and surface-enhanced Raman spectroscopy (SERS) are used to investigate the interactions between lacunary polyoxometalate, α-SiW11O398-, and glassy carbon, Au(111), and Ag(111) electrode surfaces. The cyclic voltammetry and STM measurements show that α-SiW11O398- anions adsorb strongly only on Ag(111). α-SiW11O398- species adsorbed on Ag(111) retains its redox activity on the Ag surface. STM images reveal the formation of monolayers on Ag(111), which have hexagonal adlattice structures with spacings between 1.22 and 1.37 nm, somewhat larger than the 1.0-nm spacing observed for the complete Keggin ion. SERS measurements show that α-SiW11O398- is present on the Ag surface at potentials between 0.0 and −0.9 V. A model rationalizing the larger spacing is proposed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
