A solid oxide fuel cell with a gadolinia-doped ceria anode: preparation and performance

Direct Utilization of Liquid Fuels in SOFC for Portable Applications: Challenges for the Selection of Alternative Anodes

“…These studies showed that copper was only an electronic conductor and does not play a catalytic role in the electrochemical oxidation, while ceria improved electrocatalytic activity and/or the ionic-electronic conductivity. Further studies using Ag or Au (also poor cracking catalysts) and ceria demonstrated that to improve stability the anode material should be catalytically active for oxidation of hydrocarbons and inactive for cracking, which was thought to be the main cause of carbon deposition [135,136]. The role of carbon deposits in enhancing the performance of Cu/ceria anodes was explained by McIntosh et al [102], who found that initially coking improves the connectivity of the metallic phase by increasing the length of the TPB.…”

Reducibility of Ceria-Based Materials Exposed to Fuels and under Fuel/Air Gradients

“…16). Nevertheless, onset of mixed conductivity has recognized impact on electrocatalytic processes, which justifies its use in cermet anodes (Marina et al, 1999). Oxygen stoichiometry changes, and corresponding oxygen storage ability, may even contribute to minimize carbon deposition in those ceria-based anodes.…”

Lower Temperature Electrolyte and Electrode Materials

“…The excellent catalytic activity on fuel oxidation provided by nickel particles and matched thermal expansion provided by the YSZ skeleton assure an excellent performance. Recently, several studies 24,25 have shown that the performance of anode cermet can be further improved by replacing YSZ with doped CeO 2 , particular in low-temperature range. The low-temperature enhancement benefits mainly from the mixed conductivity shown by the redox couple Ce 4+ /Ce 3+ in reducing atmospheres, which catalyzes fuel oxidation.…”