室温快速合成一种钴基金属有机框架材料纳米颗粒用于高效氧析出

Rapid Synthesis of Co-Based Metal-Organic Framework Nanoparticle at Room Temperature for Efficient Oxygen Evolution Reaction

采用一种在室温下快速、温和的方法制备Co-MOF-74纳米颗粒,该纳米颗粒结晶度好、形貌均匀,可在碱性介质中实现高效电催化析氧反应(OER)。相较于传统的水热合成法,通过引入三乙胺大大降低了合成所需时间,只需室温下搅拌2 h即可得到Co-MOF-74纳米颗粒(约20 nm)。该纳米催化剂呈现出更高的比表面积(760 m^(2)·g^(-1))、良好的OER活性和稳定性,在10 mA·cm^(-2)的电流密度下过电势仅为275 mV。

A fast and mild method was developed to prepare Co-MOF-74 nanoparticles with high crystallinity and uniform morphology at room temperature for efficient oxygen evolution reaction(OER)in alkaline media.Compared with the conventional hydrothermal route,the time required for synthesis was greatly reduced after introducing triethylamine:Co-MOF-74 nanoparticles(about 20 nm)could be readily available by stirring at room temperature for only 2 h.The nano-electrocatalyst exhibited a larger specific surface area(760 m^(2)·g^(-1)),excellent activities and stability for OER with an overpotential of 275 mV to achieve a current density of 10 mA·cm^(-2).