Double Perovskite LaFexNi1@xO3 Nanorods Enable Efficient Oxygen Evolution Electrocatalysis
Huaping Wang1,2, Juan Wang1, Yecan Pi1, Qi Shao1, Yueming Tan2, and Xiaoqing Huang1,*（黄小青）
1College of Chemistry, Chemical Engineering and Materials Science Soochow University No.199, Ren’ai Road, Suzhou 215123, Jiangsu (China)
2 Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University Changsha 410081 (China)
Angew. Chem. Int. Ed.2019, 58, 2316--2320
Perovskite‐based electrocatalysts are one of the most promising materials for oxygen evolution reaction (OER), but their activity and durability are still far from desirable. Herein, we demonstrate that the double perovskite LaFexNi1−xO3 (LFNO) nanorods (NRs) can be adopted as highly active and stable OER electrocatalysts. The optimized LFNO‐II NRs with Ni/Fe ratio of 8:2 achieve a low overpotential of 302 mV at 10 mA cm−2 and a small Tafel slope of 50 mV dec−1, outperforming those of the commercial Ir/C. The LFNO‐II NRs also show high OER stability with slight current decrease after 20 h. The enhanced activity is explained by the improved surface area, tailored electronic structure as well as strong hybridization between O and Ni.