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Assembly and Electrochemical Characterization of Nanometer-Scale Electrode/Solid Electrolyte Interfaces

Loster, Matthias and Friedrich, K. Andreas and Scherson, Daniel A. (2006) Assembly and Electrochemical Characterization of Nanometer-Scale Electrode/Solid Electrolyte Interfaces. The Journal of Physical Chemistry B, 110 (37), pp. 18081-18087. ACS Publications.

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Official URL: http://pubs.acs.org/journals/jpcbfk/

Abstract

A technique is herein described for the assembly and characterization of nanometer-scale metal electrode/solid electrolyte interfaces of variable dimensions. The specific system examined in this work involves a sharp Pt tip attached to the piezo-driven head of a scanning tunneling microscope (STM) allowing the tip to be inserted into (or retrieved from) a Nafion membrane placed normal to the direction of tip travel. The actual Pt/Nafion area of contact was determined by coulometric analysis of the characteristic voltammetric features of Pt, using the tip as the working electrode and a much larger Pt gauze attached to the other side of the Nafion as a counter-reference electrode, yielding for some of the interfaces examined values equivalent to as low as 35 000 Pt surface atoms. This rather versatile arrangement allows experiments to be performed in both inert (Ar) and reactive atmospheres, such as oxygen or hydrogen on either or both sides of the membrane, under controlled humidity conditions, and thus sheds light into such phenomena as changes in the overall faradaic currents induced by plastic deformations of the Nafion as well as fundamental aspects of mass transport at reactant gasjPtjNafion three-boundary interfaces of relevance to polymer electrolyte fuel cells (PEFCs).

Item URL in elib:https://elib.dlr.de/45697/
Document Type:Article
Title:Assembly and Electrochemical Characterization of Nanometer-Scale Electrode/Solid Electrolyte Interfaces
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Loster, MatthiasZentrum für Sonnenenergie und Wasserstoffforschung (ZSW)UNSPECIFIED
Friedrich, K. AndreasUNSPECIFIEDUNSPECIFIED
Scherson, Daniel A.Case Western Reserve UniversityUNSPECIFIED
Date:8 July 2006
Journal or Publication Title:The Journal of Physical Chemistry B
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:110
Page Range:pp. 18081-18087
Editors:
EditorsEmail
American Chemical Society, UNSPECIFIED
Publisher:ACS Publications
Status:Published
Keywords:Reaktivität, Brennstoffzellen, Platin
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E BZ - Fuel cells (old)
DLR - Research area:Energy
DLR - Program:E BZ - Fuel cells
DLR - Research theme (Project):E - Membran-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:27 Nov 2006
Last Modified:12 Dec 2013 20:22

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