过电位
塔菲尔方程
析氧
电催化剂
纳米棒
钙钛矿(结构)
材料科学
化学工程
纳米技术
电化学
结晶学
化学
物理化学
电极
工程类
作者
Huaping Wang,Juan Wang,Yecan Pi,Qi Shao,Yueming Tan,Xiaoqing Huang
标识
DOI:10.1002/anie.201812545
摘要
Abstract 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 LaFe x Ni 1− x O 3 (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.
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