Investigation of composite Ni-doped perovskite anode catalyst for electrooxidation of hydrogen and light hydrocarbons in solid oxide fuel cells

  • Massimiliano Lo Faro, CNR-ITAE, Italy
  • Dr Daniela La Rosa, Italy
  • Dr Antonino Aricò, CNR-ITAE, Italy
  • Dr Vincenzo Antonucci, CNR-ITAE, Italy
  • Propane is the main component of liquefied petroleum gases (LPG). This is an interesting fuel for SOFCs. It is cheap, widely available and it can be liquefied to facilitate its storage for specific applications. Due to these properties, desulphurised propane and LPG have good properties to be used as fuel in portable power sources. Recently, several investigations have been addressed to the use of Ru as promoter of propane oxidation in IT-SOFCs. Yet, the high cost of Ru suggests searching for an alternative catalyst formulation with similar activity at intermediate temperatures. Perovskite materials are characterized by mixed electronic-ionic conductivity and the interaction between the dispersed Ni- phase and LSFCO oxide at high temperature modify the electronic properties and the propensity of Nickel to form carbon deposits. In this catalytic layer, Ni is not present in the bulk form as in a classical cermet but, it is well dispersed on the perovskite support. In order to evaluate the characteristics of this catalytic system, temperature programmed analyses have been carried out as well as hydrogen and propane direct electro-oxidation process has been evaluated in a ceria-electrolyte supported single cell. The aim of this work is to demonstrate that the direct oxidation of hydrogen and propane can be effectively carried out in a IT-SOFCs using more reversible anodic catalysts rather than Ni, in presence of ceria based electrolytes.