Underpotential deposition and involved alloy formation of cadmium on silver particles modified HOPG substrates
| Autor: | S.G. García, M.E. Pronsato, Rubén Eduardo Ambrusi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Inorganic chemistry Alloy 02 engineering and technology INGENIERÍAS Y TECNOLOGÍAS engineering.material 010402 general chemistry Electrochemistry 01 natural sciences Adsorption Desorption General Materials Science CD–AG ALLOY Pyrolytic carbon DENSITY FUNCTIONAL THEORY Electrical and Electronic Engineering Polarization (electrochemistry) Bimetallic strip Nanotecnología UNDERPOTENTIAL DEPOSITION 021001 nanoscience & nanotechnology Condensed Matter Physics Underpotential deposition Nano-materiales 0104 chemical sciences Ingeniería Química Chemical engineering Otras Ingeniería Química engineering ELECTRODEPOSITION 0210 nano-technology BIMETALLIC PARTICLES |
| DOI: | 10.1007/s10008-017-3735-8 |
| Popis: | Cadmium underpotential deposition (UPD) on Ag particles modified highly ordered pyrolytic graphite (HOPG) surfaces, and the involved alloy formation were studied by conventional electrochemical techniques. Voltammetric results indicated that the Cd UPD followed an adsorption behavior different from that observed for massive Ag electrodes and Ag particles supported on vitreous carbon. Nanometer-sized bimetallic Cd–Ag particles were characterized by ex situ atomic force microscopy (AFM). Initially, AFM images show Ag deposits of similar size distributed preferably on HOPG step edges. No remarkable morphological changes are observed on the surface after the subsequent Cd deposition, suggesting that the Cd particles are deposited selectively over the Ag crystals. From the analysis of desorption spectra, employing different polarization times, and density functional theory (DFT) calculations, the formation of a Cd–Ag surface alloy could be inferred. Fil: Ambrusi, Rubén Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina Fil: Pronsato, Maria Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina Fil: Garcia, Silvana Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina |
| Databáze: | OpenAIRE |
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