Impact of Glass Corrosion on the Electrocatalysis on Pt Electrodes in Alkaline Electrolyte
- 1 January 2008
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 155 (1), P1
- https://doi.org/10.1149/1.2800752
Abstract
We report on the influence of glass corrosion on establishing the electrocatalytic activity of fuel cell catalysts. A Teflon electrochemical cell was designed for measurements in alkaline electrolyte. The cell performance was tested and compared to a standard electrochemical glass cell by measuring the oxygen reduction reaction and the hydrogen oxidation reaction on polycrystalline platinum in Formula KOH. It is demonstrated that in the Teflon cell the shape of the cyclic voltammogram as well as the activity for the reactions are reproducible and do not alter over a long period of time. By comparison, using the standard electrochemical cell made out of Duran glass, it is found that the experiments on polycrystalline Pt electrodes in alkaline electrolyte are insufficiently reproducible. The cyclic voltammograms alter over time, and the activities of the hydrogen oxidation as well as the oxygen reduction depend on the applied potential scan limits. This is due to the contamination of the electrolyte because of the etching of glass by KOH, which is further supported with an analysis of the alkaline electrolyte after usage in the respective cell types by inductively coupled plasma–optical emission spectroscopyKeywords
This publication has 27 references indexed in Scilit:
- Trends in electrocatalysis on extended and nanoscale Pt-bimetallic alloy surfacesNature Materials, 2007
- Improved Oxygen Reduction Activity on Pt 3 Ni(111) via Increased Surface Site AvailabilityScience, 2007
- Effect of Surface Composition on Electronic Structure, Stability, and Electrocatalytic Properties of Pt-Transition Metal Alloys: Pt-Skin versus Pt-Skeleton SurfacesJournal of the American Chemical Society, 2006
- Changing the Activity of Electrocatalysts for Oxygen Reduction by Tuning the Surface Electronic StructureAngewandte Chemie International Edition, 2006
- The Impact of Geometric and Surface Electronic Properties of Pt-Catalysts on the Particle Size Effect in ElectrocatalysisThe Journal of Physical Chemistry B, 2005
- Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCsApplied Catalysis B: Environment and Energy, 2004
- An assessment of alkaline fuel cell technologyInternational Journal of Hydrogen Energy, 2002
- Surface science studies of model fuel cell electrocatalystsSurface Science Reports, 2002
- Enhancement of the Electroreduction of Oxygen on Pt Alloys with Fe, Ni, and CoJournal of the Electrochemical Society, 1999
- Effect of Temperature on Surface Processes at the Pt(111)−Liquid Interface: Hydrogen Adsorption, Oxide Formation, and CO OxidationThe Journal of Physical Chemistry B, 1999