A proton-conducting solid state H2S-O-2 fuel cell 2. Production of liquid sulfur at 120-145 degrees C

A proton-conducting solid state H2S-O-2 electrochemical cell has been opera ted at 120-145 degrees C and 235-510 kPa continuously for extended periods, in both fuel cell and electrolysis modes. In fuel cell mode, the products are liquid sulfur, steam and electrical power. Operation at elevated pressu res enables the Nafion membrane to remain moist. Anode catalysts Pd/C, Pt/C , Pd-Pt/C and MoS2, admired with 35% Teflonized carbon, are each stable and durable. Sulfur does not block or poison anode catalyst sites. The membran e is impervious to H2S. (C) 2000 International Association for Hydrogen Ene rgy. Published by Elsevier Science Ltd. All rights reserved.