Sr2FeNbO6 Applied in Solid Oxide Electrolysis Cell as the Hydrogen Electrode: Kinetic Studies by Comparison with Ni-YSZ

Effects of the atmosphere and Mn doping on the electrical properties of Sr2Fe1−xMnxNbO6 and their mechanisms

“…Some other double-perovskite electrode materials also show good cell performances, such as Ba 2 CoMo 0.5 Nb 0.5 O 6−delta [16], Sr 2 FeMoO 6 [17,18], YBaCo 2−x Fe x O 5+delta [19], SmBaCuCoO 5+delta [20], etc [21][22][23][24]. Moreover, we have introduced Sr 2 FeNbO 6 to SOEC and proved that it can be used as the hydrogen electrode and its electrochemical performance is better than that of Ni under the same operation conditions [25].…”

“…Thus, R&D of new double-perovskite electrode materials and study on their electrochemical mechanisms are the current research directions. On the basis of previous studies [25,29], a modification of Sr 2 FeNbO 6 is made herein. It should be noted that this article is an extension of the previous work in depth and breadth.…”

Hydrogen Generation Using Solid Oxide Electrolysis Cells

“…It demonstrated short-term stability up to 30 h under the current drawn at 200 mA cm -2 and the absolute humidity of 60% at 850°C. Reaction mechanism of the steam electrolysis at 850°C using Sr 2 FeNbO 6 double perovskite was investigated by Xu et al [26], and it was found that the improved electrochemical performance was ascribed to the decrease in the activation energy of the charge transfer process and increased electrical conductivity. The crystal structure of typical double perovskite (A 2 BB O 6 ) is shown in Figure 3.…”

Solid oxide electrolysis – a key enabling technology for sustainable energy scenarios

“…36 Double perovskite Sr 2 FeNbO 6 (SFN) have also been claimed to be better than Ni-YSZ. 37 Very few experiments have been done with the very promising metal supported cathodes and the longest tests showed signicant oxidation of the metal support structure 38 and a degradation rate of around 3.2% per 1000 h in the 2000 h durability experiment. Metal supported cells have been used successfully in SOFC operation where the steam partial pressure at the exit is comparable to SOEC operation.…”