Abstract
In the present work, cobalt pentlandite (Co9S8) is studied as a solid oxide fuel cells (SOFC) anode material which is stable in H2S-containing fuels and is promising in coal-based SOFCs. Co9S8 is synthesized via a simple hydrothermal method. Uniform and fine Co9S8 particles are deposited on to the YSZ skeleton directly by using hydrothermal impregnation method and adhered to the skeleton closely after heat treating in N2. The symmetrical cells are measured in the presence of 50 ppm H2S–H2 to determine the electrochemical performance at intermediate temperatures. The polarization resistance is only 0.3385 Ω cm2 at 650 °C. It is concluded that Co9S8 exhibits a combination of good electronic conductivity and catalytic activity and has the potential to be used as a sulfur-tolerant anode material of SOFCs.
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