Electrode catalyst for H2S fuel cells
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United States of America Patent
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Mar 21, 2006
Grant Date -
Nov 20, 2003
app pub date -
Nov 8, 2002
filing date -
May 14, 2002
priority date (Note) -
Expired
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Abstract
The present invention relates to an anode catalyst for use in the electrochemical oxidation of H2S to elemental sulfur and water, specifically in a fuel cell having an ion-conducting membrane. The catalyst comprises a material prepared from two or more metal sulfides of the formula MSx, wherein M is selected from the group consisting of Co, Ni, Fe, Mo, Cu, Cr, W and Mn, and x is between about 1.0 and about 2.5; a conductive material suitable for fuel cell operation; and a porous material. The invention further provides methods of preparing the catalyst, fuel cells comprising the catalyst and methods of electrochemically oxidizing H2S using the catalyst.
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