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Author Barton, S. A. C. ♦ West, A. C. ♦ Murach, B. L. ♦ Fuller, T. F.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword DIRECT ENERGY CONVERSION ♦ SYNTHETIC FUELS ♦ ALCOHOL FUEL CELLS ♦ METHANOL ♦ MONITORING ♦ DESIGN ♦ CONCENTRATION RATIO ♦ PERFORMANCE ♦ ON-LINE MEASUREMENT SYSTEMS
Abstract An aqueous methanol sensor for portable direct methanol fuel cell applications is demonstrated. The design is based on current output limited by methanol diffusion through a Nafion 117 perfluorosulfonic acid membrane. Steady-state polarization measurements demonstrate sensitivity to concentrations of 0 to 4 M over a temperature range of 40 to 80C. Furthermore, a correlation that is first order in concentration and temperature is demonstrated for concentrations of 0 to 3 M, with an accuracy of {+-}0.1 M. Measurements of transient response to step concentration change indicate a response time of about 10 to 50 s, depending primarily on temperature.
ISSN 00134651
Educational Use Research
Learning Resource Type Article
Publisher Date 1998-11-01
Publisher Place United States
Journal Journal of the Electrochemical Society
Volume Number 145
Issue Number 11


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