【摘 要】
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Two anode catalysts with Pt, MoS2 and composite metal sulfides (MoS2+NiS), are investigated forelectrochemical oxidation of hydrogen sulfide in solid oxide fuel
【机 构】
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College of Chemical Engineering,Department of Chemical and Materials Engineering
论文部分内容阅读
Two anode catalysts with Pt, MoS2 and composite metal sulfides (MoS2+NiS), are investigated forelectrochemical oxidation of hydrogen sulfide in solid oxide fuel cell (SOFC) at temperatures 750-850℃. Thecatalysts comprising MoS2 and MoS2+NiS exhibited good electrical conductivity and catalytic activity. MoS2 andcomposite catalysts were found to be more active than Pt, a widely used catalyst for high temperature H2S/O2fuel cell at 750-850℃. However, MoS2 itself sublimes above 450℃. In contrast, composite catalysts containingboth Mo and transition metal (Ni) are shown to be stable and effective in promoting the oxidation of H2S in SOFCup to 850℃. However, electric contact is poor between the platinum current collecting layer and the compositemetal sulfide layer, so that the cell performance becomes worse. This problem is overcome by adding conductiveAg powder into the anode layer (forming MoS2+NiS+Ag anode material) to increase anode electrical conductanceinstead of applying a thin layer of platinum on the top of anode.
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