For electrochemical energy conversion, highly efficient and stable electrocatalysts are required, which are principally designed and synthesized by virtue of structural regulations. Two-dimensional Cluster-based Metal-Organic Layers (CMOLs) would have good...

Basic requirements for advanced and practical supercapacitors need electrode materials with strong stability, high surface area, well-defined porosity, and enhanced capability of ion insertion and electron transfer. It is worth mentioning that the two-dimensional cluster-based Ni/Co−organic layer (Ni 0.7 Co 0.3 -CMOL) inherits high stability from the Kagoḿe lattice and shows excellent pseudocapacitance behavior. As an optimized atomic composition, this crystalline CMOL exhibits excellent performance and stability both in 1.0 M KOH and All-Solid-State Flexible Asymmetric Supercapacitor (ASCs). The specific capacitance values are 1211 and 394 F g −1 and the energy density is 54.67 Wh kg −1 at 1 A g −1 . Good cycling stability is characterized by its capacitance retention, maintained at 92.4% after 5000 cycles in a three-electrode system and 90% after 2000 cycles at 20 A g −1 for assembled All-Solid-State Flexible ASCs. An in situ XRD technique was used in the three-electrode system, which showed that there was no signal of crystalline substance that affected the cyclic stability of the material while charging and discharging. These superior results prove that Ni 0.7 Co 0.3 -CMOL is a promising candidate for supercapacitor applications.

The correlation between coordination mode and electrocatalytic water oxidation behavior are highly remarkable. Herein, we designed an iron-based metal-organic framework (MOF) to realize a configuration variety from the traditional mononuclear configuration (Fe-MOF-M) to the binuclear structure (Fe-MOF-B). The configuration of Fe-MOF was successfully regulated by pH control and nickel was introduced into the iron-based MOF to obtain an efficient heterogeneous electrocatalyst. Benefiting from the dual function of adding Ni atoms, enhanced stability and optimized synergistic effect of different metal sites, the Ni 0.8 Fe 0.2 -MOF-B delivers a current density of 10 mA cm À 2 at a low overpotential of 301 mV with a small Tafel slope of 62.3 mV dec À 1 in 0.1 M KOH. This work presents a simple method to adjust configuration and the Ni 0.8 Fe 0.2 -MOF-B plays a supporting role to investigate the impact of configuration on OER performance.