NDLI: Cathode catalyst for primary phosphoric fuel cells

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Cathode catalyst for primary phosphoric fuel cells

Content Provider	NASA Technical Reports Server (NTRS)
Author	Walsh, F.
Copyright Year	1980
Description	Alkylation of Vulcan XC-72 provided the most stable bond type for linking CoTAA to the surface of the carbon; this result is based on data obtained by cyclic voltammetry, pulse voltammetry and by release of 14C from bonded CoTAA. Half-cell tests at 100 C in 85% phosphoric acid showed that CoTAA bonded to the surface of carbon (Vulcan XC-72) via an alkylation procedure is a more active catalyst than is platinum based on a factor of two improvement in Tafel slope; dimeric CoTAA has catalytic activity equal to platinum. Half-cell tests also showed that bonded CoTAA catalysts do not suffer a loss in potential when air is used as a fuel rather than oxygen. Commercially available PTFE was shown to be stable for four months in 200 C 85% phosphoric acid based on lack of change in surface wetting properties, IR and physical characteristics. When stressed electrochemically in 150 C 85% phosphoric acid, PTFE also showed no changes after one month.
File Size	492303
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19820014801
Archival Resource Key	ark:/13960/t8gf5mj3s
Language	English
Publisher Date	1980-09-01
Access Restriction	Open
Subject Keyword	Energy Production And Conversion Phosphoric Acid Product Development Fuel Cells Electrocatalysts Cathodes Energy Conversion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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