Specific adsorptive properties and anodic polarization characteristics for hydrogen and methane in the Ni1-xCox solid-solution alloy combined with yttria-stabilized zirconia

Abstract

The Ni-based cermet anode of a solid oxide fuel cell is prone to deactivation for the direct supply of CH4 due to carbon deposition. Discovered are specific adsorptive properties of Ni1-xCox solid-solution alloy catalysts combined with yttria-stabilized zirconia (Ni1-xCox-YSZ) using the temperature-programmed desorption technique. Decreasing the activation energy in the thermal desorption of adsorbed CH4 and CO from Ni1-xCox-YSZ accounts for minimizing the anodic polarization of the Ni/YSZ cermet by Co alloying in the electrochemical oxidation of CH4, suppressing carbon deposition.