Sulphur poisoning of solid oxide electrolysis cell anodes
MetadataShow full item record
Sulphur poisoning for state-of-the-art La 0.8 Sr 0.2 MnO 3-Î´ (LSM) anodes of solid oxide electrolysis cell (SOEC) was studied under anodic current of 200 mA/cm 2 in 1 ppm SO 2 air. After polarization in 1 ppm SO 2 -containing air at 800 Â°C for 40 h, electrode polarization resistance as well as ohmic resistance of LSM electrodes were measured 24.83 Î© cm 2 and 6.09 Î© cm 2 , which were around 4 as well as 3 times than initial values of LSM electrodes. Sulphur deposition prefers to take place at the LSM/YSZ interface and inner layer for LSM electrodes, leading to the formation of SrSO 4 compounds, which is confirmed by XRD and then leads to the microstructural change of the LSM electrodes. The anodic polarization promotes the SrO segregation, which is supported by the observation of the deposition of SrSO 4 compounds, accelerating LSM electrodes delamination. The results indicate the obvious poisoning effect for sulphur species of electrochemical activity as well as stability of SOEC electrodes.
Showing items related by title, author, creator and subject.
Investigation into the voltammetric behaviour and detection of selenium(IV) at metal electrodes in diverse electrolyte mediaBeni, V.; Collins, G.; Arrigan, Damien (2011)The voltammetric behaviour of selenium(IV) was studied at platinum and gold electrodes in sulphuric acid, perchloric acid and potassium chloride media as a basis for its voltammetric detection. The best voltammetric ...
Development of (Gd, Ce) O2-impregnated (La, Sr) MnO3 anodes of high temperature solid oxide electrolysis cellsChen, Kongfa; Ai, Na; Jiang, San Ping (2010)Gd0.2Ce0.8O1.9 (GDC)-impregnated La0.8Sr0.2MnO3 (LSM) electrodes are developed as the anodes for high temperature solid oxide electrolysis cells _SOECs_. The effect of anodic polarization current passage on the electrode ...
Cyclic polarization enhances the operating stability of La0.57Sr0.38Co0.18Fe0.72Nb0.1O3-δ oxygen electrode of reversible solid oxide cellsHe, Z.; Zhang, L.; He, S.; Ai, N.; Chen, K.; Shao, Y.; Jiang, San Ping (2018)Reversing the direction of polarization current is essential for reversible solid oxide cells technologies, but its effect on cobaltite based perovskite oxygen electrodes is largely unknown. Herein, we report the operating ...