LaNi<sub>x</sub>Fe<sub>1‐x</sub>O<sub>3‐δ</sub>‐Quantum Dot/CNT Composite for High Performance Oxygen Evolution Reaction
Shiqing Lu, Yangchen Wang, Yuqi Han, Ming Zhong, Haidong Yang, Bitao Su, Ziqiang Lei
Abstract
Abstract Rational design of active and earth‐abundant catalysts toward oxygen evolution reaction (OER) is of particular significance for archiving highly efficient water electrolysis. Herein, a series of perovskite oxide quantum dots with abundant oxygen vacancies adhered on oxidized carbon nanotubes (LaNi X Fe 1‐X O 3‐δ ‐QDs/CNTs) were fabricated by simple sol‐gel and pyrolysis methods. The results indicate that the optimized LaNi 0.3 Fe 0.7 O 2.759 ‐QDs/CNTs sample with adjust crystal structure, proper ratio of Ni to Fe, and desirable oxygen vacancy concentration shows a low overpotential (0.34 V at 10 mA/cm 2 ), a low Tafel slope (74 mV dec −1 ), and excellent stability when it was evaluated as OER electrocatalyst. This work will shed light on the development of precious‐metal‐free catalysts with promoted catalytic performance