Composite cathode La0.4Sr0.4TiO3-[delta]- Ce0.8Sm0.2O2-[delta] impregnated with Ni for high-temperature steam electrolysis
MetadataShow full item record
Composite Ni–SDC (Samaria doped Ceria) cathodes are able to operate in strong reducing atmospheres for steam electrolysis, and composite cathodes based on redox-stable La0.4Sr0.4TiO3 (LSTO) have demonstrated promising performances without the reducing gas flow. However, the electro-catalytic activity of cathodes based on LSTO is insufficient for the efficient electrochemical reduction of steam or carbon oxide. In this work, catalytic-active Ni nanoparticles were loaded on a La0.4Sr0.4TiO3−δ–Ce0.8Sm0.2O2−δ cathode (Ni-loaded LSTO–SDC) via an impregnation method to improve the electrode performances for direct steam electrolysis. The synergetic effect of catalytically-active Ni nanoparticles and the redox-stable LSTO–SDC skeleton contributed to the improved performances and the excellent stability of the cathode for direct steam electrolysis. The current efficiency with a Ni-loaded cathode was enhanced by 3% and 17% compared to the values with a bare LSTO–SDC cathode under 2.0 V of applied voltage at 800 °C with a flow of 3% H2O/5% H2/Ar and 3% H2O/Ar to cathodes, respectively.
Showing items related by title, author, creator and subject.
Dong, D.; Shao, X.; Hu, X.; Chen, K.; Xie, K.; Yu, L.; Ye, Z.; Yang, P.; Parkinson, G.; Li, Chun-Zhu (2016)Gas diffusion limitation within Ni/YSZ cathode supports of solid oxide electrolysis cells (SOECs) during steam electrolysis has been reported in previous studies. In this study, a microchanneled cathode support has been ...
Perovskite chromates cathode with resolved and anchored nickel nano-particles for direct high-temperature steam electrolysisXu, S.; Dong, Dehua; Wang, Y.; Doherty, W.; Xie, K.; Wu, Y. (2013)Doped lanthanum chromates are now commonly used to prepare composite cathodes for direct steam electrolysis. However, the limitation of electrochemical performances and cell current efficiency by insufficient electro-catalytic ...
A composite cathode based on scandium-doped chromate for direct high-temperature steam electrolysis in a symmetric solid oxide electrolyzerChen, S.; Xie, K.; Dong, Dehua; Li, H.; Qin, Q.; Zhang, Y.; Wu, Y. (2015)Composite cathodes based on La0.75Sr0.25Cr0.5Mn0.5O3-d (LSCM) are promising candidates for direct steam electrolysis while their insufficient electro-catalytic activity still restricts Faradic efficiency and electrode ...