Tang Lin, Cai Minjuan, Zhang Maosheng, Chen Xi, Cai Zhixiong
College of Chemistry, Chemical Engineering and Environment, Minnan Normal University Zhangzhou 363000 China
College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China.
RSC Adv. 2022 Sep 5;12(38):25112-25117. doi: 10.1039/d2ra04871j. eCollection 2022 Aug 30.
Metal-organic frameworks (MOFs) have emerged as alternative OER catalysts due to their easy regulation, such as self-reconstruction from MOFs to metal hydroxides through alkaline hydrolysis. Herein, we demonstrate a facile strategy for the transformation of FeCo layered double hydroxide (FeCo-LDH) nanosheets into 1D spindle-shaped FeCo-MOFs for efficient OER. An optimized electrode of FeCo-MOF on a nickel foam (NF) was achieved by adjusting the addition of organic ligands and the reaction time in the hydrothermal reaction. Based on the unique 1D nanostructure and the cation regulation, the obtained FeCo-MOF exhibits a good catalytic performance toward the OER with a low overpotential of 475 mV at 100 mA cm, a small Tafel slope of 121.8 mV dec, and high long-term durability. This study provides a facile strategy for preparing bimetal-MOFs as catalysts for efficient OER.
金属有机框架材料（MOFs）因其易于调控，如通过碱性水解实现从MOFs到金属氢氧化物的自重构，而成为替代析氧反应（OER）催化剂。在此，我们展示了一种将FeCo层状双氢氧化物（FeCo-LDH）纳米片转化为一维纺锤形FeCo-MOFs以实现高效OER的简便策略。通过在水热反应中调节有机配体的添加量和反应时间，在泡沫镍（NF）上制备了优化的FeCo-MOF电极。基于独特的一维纳米结构和阳离子调控，所制备的FeCo-MOF对OER表现出良好的催化性能，在100 mA cm时过电位低至475 mV，塔菲尔斜率小至121.8 mV dec，且具有高的长期耐久性。本研究为制备双金属MOFs作为高效OER催化剂提供了一种简便策略。
