Effect of Au and/or Mo Doping on the Development of Carbon and Sulfur Tolerant Anodes for SOFCs—A Short Review

• The kinetics of CH4 steam reforming and partial oxidation are determined by the oxidation rate of CHx adsorbed species • The modification of the Ni/YSZ and Ni/GDC with Au and/or Au-Mo results in differentiated structures of atomically dispersed Au and/or Au-Mo at the surface and the bulk of the Ni particles. • At lean S/C NiAu/YSZ selectively oxidizes electrochemically the catalytically produced H2 and CO, while NiAu/GDC is selective to the direct partial electrochemical oxidation of CH4 to CO and H2. • The modified electrodes show significant tolerance to C formation. • Au-Mo modification enhances the intrinsic sulfur tolerance properties of Ni/GDC.