Development and characterization of fluorine tin oxide electrodes modified with high area porous thin films containing gold nanoparticles
| Autor: | Laura Mora, Carmen Quintana, Hermenegildo García, Gerolamo Budroni, Lucas Hernández, Pedro Atienzar, Avelino Corma |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Oxide Nanoparticle Mineralogy Sintering Fluorine doped tin oxide chemistry.chemical_compound QUIMICA ORGANICA Scanning transmission electron microscopy QUIMICA ANALITICA Materials Chemistry Gold nanoparticles Electrodes Metal oxide Metals and Alloys Surfaces and Interfaces Tin oxide Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Chemical engineering Colloidal gold Electrode Porosity Chemically modified electrode |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | [EN] Different electrode materials are prepared using fluoride doped tin oxide (FTO) electrodes modified with high area porous thin films of metal oxides containing gold nanoparticles. Three different metal oxides (TiO2, MgO and SnO2) have been assayed to this end. The effect of the metal oxide nature and gold loading on the structure and performance of the modified electrodes was examined by Scanning Electron Microscopy, Transmission Electron Microscopy, X-Ray Diffraction (XRD), Diffuse Reflectance Spectroscopy and electrochemical techniques. XRD measurements reveal that MgO electrodes present the smallest gold nanoparticles after the sintering step however, the electrochemical response of these electrodes shows important problems of mass transport derived from the high porosity of these materials (Brunauer Emmett Teller area of 125 m(2)/g). The excellent sintering properties of titania nanoparticles result in robust films attached to the FTO electrodes which allow more reliable and reproducible results from an electroanalytical point of view. (C) 2010 Elsevier B.V. All rights reserved. Authors thank to CCG07-UAM/PPQ-1645, MAT 2006-14274-C02-01 and CTQ06-06859 for financial support. |
| Databáze: | OpenAIRE |
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