Electrode polarization measurements in the Fe|SrCe0.95Yb0.05O2.975|Au proton conducting solid electrolyte cell

Polarization study of Fe|BaCe0.5Zr0.3Y0.08Yb0.08Cu0.04O3-δ|Fe electrochemical cells in wet H2 atmosphere

“…The apparent activation energy (0.55 ± 0.05 eV) is similar to the activation energy observed in the case of the PdeSrCe 0.95 Yb 0.05 O 3-a system (0.73 eV) [25], the AueSr 0.995 Ce 0.95 Y 0.05 O 2.970 system (0.60 eV), the NieSr 0.995-Ce 0.95 Y 0.05 O 2.970 system (0.70 eV) for the H 2 oxidation, and the PteSr 0.995 Ce 0.95 Y 0.05 O 2.970 system (0.74 eV) [18] while is lower compared to the activation energy observed for the Ag-SCY (1.4 eV) [22] or the AgeSr 0.995 Ce 0.95 Y 0.05 O 2.970 (1.0 eV) system [21]. The activation energy of the exchange current density calculated in the present work can be compared to those reported in literature for metals over SCY electrolyte [23,28].…”

Hydrogen oxidation at the Pt–BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) interface

“…Actually, the values of these parameters were influenced by temperature, hydrogen partial pressure, the nature of the electrolyte and electrode, and the electrolyte-electrode interface. 13,21 To further verify the fitting results, the values of the overpotential and current density obtained at low anodic polarization were fitted into eqn (2) to estimate the corresponding I o,a (a a + a c ) at different temperatures, as shown in Table 2. Ideally, the value of a a + a c should be 1.…”

Analysis of a proton-conducting SOFC with direct internal reforming

“…The most common materials of anode, electrolyte, and cathode are made from Pt, SCY, (SrCe 0.95 Yb 0.05 O 3− ) and Pt, respectively. It is noted that the SCY electrolyte is known as one of the classical proton-conducting materials with a high proton transport number (Iwahara, 1996) and is commonly used in experimental studies (Iwahara et al, 1982;Taherparvar et al, 2003;Fukada et al, 2006;Potter and Baker, 2006;Pekridis et al, 2007).…”

“…Previous investigations have been mainly focused on SOFCs with an oxygen ion conducting electrolyte (SOFC-O 2− ) (Achenbach, 1994;Ferguson et al, 1996;Aguiar et al, 2002Aguiar et al, , 2004Hernandez-Pacheco et al, 2005a;Hussain et al, 2006). However, as solid oxides with proton conduction have been discovered (Iwahara et al, 1982;Zhu and Mellander, 1994;Iwahara, 1996;Coors, 2003), a number of researches related to the use of such a solid oxide in SOFCs (SOFC-H + ) have been reported (Demin and Tsiakaras, 2001;Assabumrungrat et al, 2004;Taherparvar et al, 2003;Fukada et al, 2006;Potter and Baker, 2006;Pekridis et al, 2007;Suksamai and Metcalfe, 2007). Demin et al (2002) presented the efficiency analysis of the SOFC-H + fed by methane using a thermodynamic model.…”