Issue 11, 2014

Accurate tuning of ordered nanotubular platinum electrodes by galvanic plating

Abstract

Platinum nanotubes are created by galvanic deposition inside porous templates. The effects of the electrolyte's ion concentration and pH, of the applied potential and of the deposition duration on the morphology of the tubes are investigated systematically. The system provides a model electrode platform with accurately tunable geometry for the fundamental investigation of electrochemical transformations. For slow electrochemical reactions, we observe a linear increase of the galvanic current with the length of the nanotubes, and therefore with the specific surface area of the electrode. In contrast to this, inherently fast electrochemical transformations are diffusion-limited and give rise to the same current density independently of the geometry. These results delineate a strategy for optimizing the performance of electrochemical energy conversion devices systematically via nanostructuring the electrode surfaces.

Graphical abstract: Accurate tuning of ordered nanotubular platinum electrodes by galvanic plating

Supplementary files

Article information

Article type
Paper
Submitted
20 Sep 2013
Accepted
23 Oct 2013
First published
24 Oct 2013
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2014,43, 4345-4350

Accurate tuning of ordered nanotubular platinum electrodes by galvanic plating

V. Roscher, M. Licklederer, J. Schumacher, G. Reyes Rios, B. Hoffmann, S. Christiansen and J. Bachmann, Dalton Trans., 2014, 43, 4345 DOI: 10.1039/C3DT52608A

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