Electrode catalysts for H2S fuel cell
OwnerKarl T. Chuang, Jingli Luo +2inventors
InventorsKarl T. Chuang, Jingli Luo, Guolin Wei, Alan R. Sanger
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Abstract
The present invention relates to an anode catalyst for use in the electrochemical oxidation of H2S to elemental sulfur, protons and electrons, specifically in a fuel cell having a proton-conducting membrane. The catalyst comprises 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.
Claims20
An anode catalyst composition for a gas phase H2S—O2 fuel cell having a proton-conducting membrane comprising:
- (a) 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;
- (b) a conductive material suitable for fuel cell operation;
- and
- (c) a porous material,
- wherein both of the conductive material and porous material are present in the composition in amounts up to about 10% by weight of the composition.
A method of preparing an anode catalyst composition for a gas phase H2S—O2 fuel cell having a proton-conducting membrane comprising:
- (a) combining two or more 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, with a conductive material suitable for fuel cell operation;
- and
- (b) combining the combination of (a) with a porous material,
- wherein both of the conductive material and porous material are present in the composition in amounts up to about 10% by weight of the composition.
Dependencies are inferred from the claim text.