Publication | Open Access
Sr, Fe Co-doped Perovskite Oxides With High Performance for Oxygen Evolution Reaction
70
Citations
34
References
2019
Year
Developing efficient and earth-abundant electrocatalysts for the oxygen evolution reaction (OER) is still a big challenge. Here, perovskite La<sub>0.4</sub>Sr<sub>0.6</sub>Ni<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>3</sub> nanoparticles were rationally designed and synthesized by the sol-gel method with an average size around 25 nm, and it has a remarkable intrinsically activity and stability in 1 M KOH solution. Compared with other perovskite (LaNiO<sub>3</sub>, LaFeO<sub>3</sub>, and LaNi<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>3</sub>) catalysts, La<sub>0.4</sub>Sr<sub>0.6</sub>Ni<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>3</sub> exhibits superior OER performance, smaller tafel slope and lower overpotential. The high electrochemical performance of La<sub>0.4</sub>Sr<sub>0.6</sub>Ni<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>3</sub> is attributed to its optimized <i>e</i> <sub><i>g</i></sub> filling (~1.2), as well as the excellent conductivity. This study demonstrates co-doping process is an effective way for increasing the intrinsic catalytic activity of the perovskite.
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