A highly active and stable La<inf>0.5</inf>Sr<inf>0.5</inf>Ni<inf>0.4</inf>Fe<inf>0.6</inf>O<inf>3-d</inf> perovskite electrocatalyst for oxygen evolution reaction in alkaline media
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© 2017 Elsevier Ltd Owing to the slow kinetics of oxygen evolution reaction (OER), developing highly active and stable OER catalysts is of great importance to realize the industrial operation for water electrolysis, reversible fuel cells and so on. Here, we report a highly active and stable La 0.5 Sr 0.5 Ni 0.4 Fe 0.6 O 3-d perovskite electrocatalyst for OER in alkaline media. La 0.5 Sr 0.5 Ni x Fe 1-x O 3-d (LSNF) perovskites with different Ni/Fe ratio were synthesized by a typical sol-gel route and investigated as potential cobalt-free OER perovskite electrocatalysts. Synchrotron XRD quantification analysis was applied to quantify the crystal structural details and changes. La 0.5 Sr 0.5 Ni 0.4 Fe 0.6 O 3-d (LSNF-5546) materials show significantly higher intrinsic activities and better stability in 0.1 M KOH for the OER including onset potential (1.56 V) and Tafel slope (76 mV/dec), higher than that of other LSNF and state-of-the-art perovskite electrocatalyst Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-d (BSCF-5582). This work demonstrates that La 0.5 Sr 0.5 Ni 0.4 Fe 0.6 O 3-d (LSNF-5546) can be a new kind of cost-effective and high-performance perovskite electrocatalyst for OER in alkaline solution, and the simple doping strategy would be a practical way to enhance oxygen evolution on perovskite electrocatalysts.
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SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable PerformanceSu, C.; Wang, W.; Chen, Y.; Yang, G.; Xu, X.; Tadé, M.; Shao, Zongping (2015)The development of efficient, inexpensive, and stable electrocatalysts for the oxygen evolution reaction (OER) is critical for many electrochemical energy conversion technologies. The prohibitive price and insufficient ...
Zhu, Y.; Zhou, W.; Zhong, Y.; Bu, Y.; Chen, X.; Zhong, Q.; Liu, M.; Shao, Zongping (2017)The development of highly efficient and low-cost electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is paramount for water splitting associated with the storage of clean and renewable ...
Toward Enhanced Oxygen Evolution on Perovskite Oxides Synthesized from Different Approaches: A Case Study of Ba0.5Sr0.5Co0.8Fe0.2O3−δXu, X.; Pan, Y.; Zhou, W.; Chen, Y.; Zhang, Z.; Shao, Zongping (2016)Development of electrocatalysts for the oxygen evolution reaction (OER) plays a critical role in electrochemical water splitting systems. Perovskite oxides represent one category of efficient catalysts for the OER, among ...