New SrMo1−xCrxO3−δ perovskites as anodes in solid-oxide fuel cells

New Nb-doped SrCo1−xNbxO3−δ perovskites performing as cathodes in solid-oxide fuel cells

“…The activation is not produced by the migration of Pt, since it is also required when Au electrodes are used. Same results are obtained with Pt or Au current collectors, as reported for the closely related anode SrMo 1Àx Cr x O 3Àd [9].…”

Novel Mg-Doped SrMoO3 Perovskites Designed as Anode Materials for Solid Oxide Fuel Cells

“…These values are, in any case, sufficiently high for the correct performance of these materials as anodes in SOFC. For instance, σ values of 175 and 160 Scm −1 were described for SrMo 0.9 Fe 0.1 O 3−δ [6] and SrMo 0.9 Cr 0.1 O 3−δ [7] at 850 °C, showing an excellent performance in the hydrogen oxidation reaction in SOFC.…”

“…In a previous work [7], an additional test using Au gauze with a small amount of Au paste as the current collector instead of Pt gauze was carried out to check if Pt could promote the catalytic process of O 2 reduction or fuel oxidation as suggested by some authors [15,16,17], increasing the power density and covering up the true activity of the oxides selected as electrodes. In this work, the maximum power densities generated by the cell were even higher than with Pt gauze.…”

“…Unfortunately, this oxygen-stoichiometric oxide cannot exhibit the required oxygen-ion diffusion and conductivity. In previous works, the Mo ions were partially replaced by 10% and 20% aliovalent elements, namely Fe 3+ and Cr 3+ [6,7], thus inducing the creation of oxygen vacancies in the perovskite material. We demonstrated that Fe and Cr doping promotes the ionic conductivity of these oxides, thus combining excellent mixed ionic and electronic conduction (MIEC) properties that make them excellent anode materials.…”

Improve electrical conductivity of reduced La2Ni0.9Fe0.1O4+δ as the anode of a solid oxide fuel cell by carbon deposition

“…The anode, in which the electro-oxidation of the fuel takes place, is a key component in a SOFC system [3,4]. An anode material should possess not only efficient ionic and electronic conductivities but also a high electro-catalytic activity [5,6].…”