Electrochemical behaviour of a composite Rh/TiO2 layer formed potentiodynamically on titanium surface
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 TiO2 films. The morphology of obtained Rh-dTiO(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 voltarnmetry on rotating disc electrode, was found to be comparable to the current of hydrogen underpotential deposition.
Keywords:
electrocatalysis / hydrogen underpotential deposition / oxygen reduction reaction / Rh/TiO2 composite layer / rhodium electrodepositionSource:
Materials Science Forum, 2006, 518, 265-270Publisher:
- Trans Tech Publications Ltd, Zurich-Uetikon
Collections
Institution/Community
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Mentus, Slavko V. AU - Krstić, Ivan AU - Tešić, Živoslav Lj. AU - Montone, A. PY - 2006 UR - https://cherry.chem.bg.ac.rs/handle/123456789/789 AB - 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 TiO2 films. The morphology of obtained Rh-dTiO(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 voltarnmetry on rotating disc electrode, was found to be comparable to the current of hydrogen underpotential deposition. PB - Trans Tech Publications Ltd, Zurich-Uetikon T2 - Materials Science Forum T1 - Electrochemical behaviour of a composite Rh/TiO2 layer formed potentiodynamically on titanium surface VL - 518 SP - 265 EP - 270 DO - 10.4028/www.scientific.net/MSF.518.265 ER -
@article{ author = "Mentus, Slavko V. and Krstić, Ivan and Tešić, Živoslav Lj. and Montone, A.", year = "2006", 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 TiO2 films. The morphology of obtained Rh-dTiO(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 voltarnmetry on rotating disc electrode, was found to be comparable to the current of hydrogen underpotential deposition.", publisher = "Trans Tech Publications Ltd, Zurich-Uetikon", journal = "Materials Science Forum", title = "Electrochemical behaviour of a composite Rh/TiO2 layer formed potentiodynamically on titanium surface", volume = "518", pages = "265-270", doi = "10.4028/www.scientific.net/MSF.518.265" }
Mentus, S. V., Krstić, I., Tešić, Ž. Lj.,& Montone, A.. (2006). Electrochemical behaviour of a composite Rh/TiO2 layer formed potentiodynamically on titanium surface. in Materials Science Forum Trans Tech Publications Ltd, Zurich-Uetikon., 518, 265-270. https://doi.org/10.4028/www.scientific.net/MSF.518.265
Mentus SV, Krstić I, Tešić ŽL, Montone A. Electrochemical behaviour of a composite Rh/TiO2 layer formed potentiodynamically on titanium surface. in Materials Science Forum. 2006;518:265-270. doi:10.4028/www.scientific.net/MSF.518.265 .
Mentus, Slavko V., Krstić, Ivan, Tešić, Živoslav Lj., Montone, A., "Electrochemical behaviour of a composite Rh/TiO2 layer formed potentiodynamically on titanium surface" in Materials Science Forum, 518 (2006):265-270, https://doi.org/10.4028/www.scientific.net/MSF.518.265 . .