title: [In situ FTIR reflection spectroscopy of molecule probe studies of enhanced IR adsorbtion and response rate to potential on Pd nanoparticles confined].
abstract: Palladium nanoparticles (nm-Pd) were synthesized in the supercages of Y-zeolite via "ship-in-a-bottle". Polyvinyl chloride (PVC) and Nafion were used as bonds respectively to prepare zeolite-modified electrode loading nm-Pd by mixed coat and steped coat. IR optical properties of adsorbed CO (COad) were studied by in situ electrochemical FTIR spectrum on zeolite-modified electrode surface prepared by different bond and coating method. Results display the same enhanced IR absorption of COad and different response rate to potential as well as the ability of electron transfer on PVC and Nafion film. Time-dependent vCOB shift was studied for obtaining the information of response rate to potential and electron transfer ability of PVC and Nafion coating. A larger potential lag on PVC coating electrode and a very small potential lag on Nafion coating film were found, showing that different bond and prepared method affect response rate to potential of zeolite-modified electrode. These findings are significant in understanding special optical performance and the electron transfer mechanism of zeolite-modified electrode.
authors.affiliation: State Key Lab for Phys. Chem. of Solid Surf., Institute of Phys. Chem., Xiamen University, Xiamen 361005, China.
authors.forename: Yan-xia
authors.initials: YX
authors.lastname: Jiang
authors.forename: Zuo-feng
authors.initials: ZF
authors.lastname: Chen
authors.forename: Nan
authors.initials: N
authors.lastname: Ding
authors.forename: Shi-gang
authors.initials: SG
authors.lastname: Sun
mesh_terms: D004563:Electrochemistry; D004566:Electrodes / Q000706:statistics & numerical data; D053768:Metal Nanoparticles / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D010165:Palladium