Metal-Organic Framework-Impregnated Calixarene-Based Cluster-Derived Hierarchically Porous Bimetallic Phosphide Nanocomposites for Efficient Water Splitting

Herein, a new type of multiwalled carbon nanotube anchored on hierarchically porous metal-organic framework (MOF)-derived bimetallic phosphide composites (M16-ZIF-67-CNT-P) is reported, which is calcined from the 16-nuclear calixarene-based clusters together with typical ZIF-67 polyhedra through a stepwise pyrolysis strategy. The as-obtained M16-ZIF-67-CNT-P sample possesses large specific surface area, quick ion diffusion, high electrical conductivity, and abundant exposed active sites, which exhibits the highest electrocatalytic capability in comparison with the control counterparts. Meanwhile, this type of nanocomposite possesses a superb anodic oxygen evolution reaction (OER) performance requiring 260 mV for 10 mA cm(-2). Overall, MOF-impregnated clusters-derived M16-ZIF-67-CNT-P exhibits an efficient water splitting performance. This method can be further extended into other systems of high-nuclear clusters with MOF materials for energy conversion and storage applications.