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The Effect of Different Co-Mo Ratios as Anode Electro-catalysts on an H2S Fuel Cell with Proton Conductors

Abstract The performance of a H2S solid oxide fuel cell with proton conductor electrolyte, which is constructed by Co-Mo metal sulfide as an anode electro-catalyst, was tested at different Co/Mo ratios. The results indicate that the maximum power output, 6.0 mW · cm−2, was obtained at Co:Mo = 2:3, the next is 5.2 mW · cm−2 at Co:Mo = 1:1, and the minimal is 4.5 mW · cm−2 at Co:Mo = 2:1. However, the obtained power output value is not consistent with the sequence of conductivity of anode materials, which results from the fact that the performance of solid oxide fuel cells are greatly affected by anode electro-catalytic activity. The electro-catalyst tests by the cyclic voltammetry method were designed to conform it. The electrical energy obtained from H2S solid oxide fuel cell is dependent on the Co/Mo metal sulfide as an anode at different atom ratios.