2% Platinum-H[sub 2]WO[sub 4] based electrocatalysts for phosphoric acid fuel-cell cathode

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2055106· OSTI ID:7022178

Savadogo, O; Essalik, A ^[1]

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1. Ecole Polytechnique, Montreal, Quebec (Canada). Dept. de Metallurgie et de Genie des Materiaux

A Pt-H[sub 2]WO[sub 4] based electrocatalyst has been fabricated by an inexpensive chemical route for use as an oxygen cathode in 99% phosphoric acid at 180 C. The effect of %Pt (w/w) and %H[sub 2]WO[sub 4] (w/w) on the Pt-H[sub 2]WO[sub 4] electrode performance was studied. The electrocatalytic properties for the oxygen reduction reaction, e.g., exchange current density, mass activity, and specific activity of a 2% Pt-H[sub 2]WO[sub 4] based electrode was several times higher than those of 10% Pt. The performance of the 2% Pt-1%H[sub 2]WO[sub 4] was not due to an increase of its electrochemically active surface area. This may be due to electronic interaction and synergetic effects between electrocatalyst and support and its chemical composition.

• OSTI ID: 7022178
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 141:8; ISSN 0013-4651
• Country of Publication: United States
• Language: English

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30 DIRECT ENERGY CONVERSION
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