Silver–carbon electrocatalyst for air cathodes in alkaline fuel cells |
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Authors: | S Gamburzev K Petrov AJ Appleby |
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Affiliation: | (1) Center for Electrochemical Systems and Hydrogen Research, Texas Engineering Experiment Station, Texas A & M University, College Station, TX 77843 – 3402, USA |
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Abstract: | A method for producing electrocatalysts containing silver supported on different carbons was developed. The catalysts were investigated in air (oxygen) diffusion electrodes in alkaline electrolyte (7 M KOH). Depending on the carbon support used, up to a threefold improvement in electrode performance was achieved compared with the activity of the uncatalysed carbon in this media. At ambient temperature and atmospheric pressure, a current density of 150 mA/cm–2 was obtained at electrode potential 1.2 V vs zinc (0.75 vs HE). A correlation between electro catalytic activity and wetted surface area of the electrocatalysts was found. |
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Keywords: | air cathode alkaline fuel cell carbon electrocatalyst silver |
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