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Electrochemical behaviour of a composite Rh/TiO 2 layer formed potentiodynamically on titanium surface

TitleElectrochemical behaviour of a composite Rh/TiO 2 layer formed potentiodynamically on titanium surface
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2006
AuthorsMentus, S., Krstić I., Tešić Ž., and Montone Amelia
JournalMaterials Science Forum
Volume518
Pagination265-270
ISBN Number9780878494057
ISSN02555476
KeywordsDeposition, Electrocatalysis, Hydrogen underpotential deposition, Oxygen reduction reaction, Reaction kinetics, Rhodium compounds, Rhodium electrodeposition, Scanning electron microscopy, Surface chemistry, Titanium surfaces
Abstract

Potentiodynamic polarization of a mechanically polished titanium electrode in a diluted solution of Rhodium(III) chloride in 0.1 M perchloric acid was performed, resulting in simultaneous formation of both Rh and TiO 2 films. The morphology of obtained Rh/TiO 2 composite film followed the morphology of titanium support, as evidenced by SEM technique. This composite surface was examined by cyclic voltammetry in both acidic and alkaline solutions, in the potential region of both hydrogen and oxygen underpotential deposition. The charge related to hydrogen underpotential deposition corresponded to a surface roughness of 43. As a consequence of high surface roughness, the diffusion current of oxygen reduction in an oxygen saturated 0.1 M NaOH solution, measured by voltammetry on rotating disc electrode, was found to be comparable to the current of hydrogen underpotential deposition.

Notes

cited By 0; Conference of 7th Conference of the Yugoslav Materials Research Society - Recent Developments in Advanced Materials and Processes, YUCOMAT VII ; Conference Date: 12 September 2005 Through 16 September 2005; Conference Code:70887

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-37849052187&partnerID=40&md5=bfd4c350f5aa772c8aa6bb154ca5ace8
Citation KeyMentus2006265