Cation and Anion Co-doped Perovskite Nanofibers for Highly Efficient Electrocatalytic Oxygen Evolution

• DOI: 10.1021/acsami.0c10045
• Publication Date: 2020-08-25T16:31:59Z
• Authors: Zhishan Li; Kan-Hao Xue; Jinsong Wang; Jian-Gang Li; Xiang Ao; Huachuan Sun; Xiaoqiang Song; Wen Lei; Yulin Cao; Chundong Wang
• Keywords: Overpotential; Oxygen evolution; Electrospinning

Perovskite oxides have been recognized as one of the most attractive oxygen evolution reaction (OER) catalysts because their low cost, earth abundance, and robust nature. Herein, one-dimensional porous LaFe1-xNixO3 (LFNO) perovskite oxide nanofibers (LFNO NFs) are fabricated with a feasible electrospinning route its further post-calcination treatment. By tailoring atomic percent Fe Ni in oxide, we determined that LaFe0.25Ni0.75O3 (LFNO-III) NFs afford best OER activity among all prepared oxides. Especially remarkable is selenide-doped (LFNOSe-III) exhibit outstanding overpotential 287 mV at 10 mA cm-2 small Tafel slope 87 dec-1 1 M KOH solution, markedly exceeding parent commercial RuO2. It also delivers decent durability no significant degradation after 22 h stability test. In meanwhile, density functional theory calculations conducted to justify optimized adsorption features *OH, *O, *OOH intermediates unveil electrocatalytic active sites atoms adjacent Ni- Se codoped perovskite. This work provides an effective method for development highly efficient catalysts.