This Communication demonstrates a novel and in situ simultaneous cavitation−doping (SCD) approach to construct bimetallic metal-doped cobalt metal−organic framework hollow nanospheres (CoM-MOF HNSs, with M = Ru or Fe). The key point of the SCD approach is the careful balance between the kinetics of Co-MOF being etched and the coordinative growth of a more stable CoM-MOF shell induced by Lewis acid (MCl 3 , with M = Ru or Fe). Our work provides a new method to synthesize bimetallic hollow MOFs and benefits the development of electrocatalysts.

Cobalt-based spinel oxides are considered as potential candidates for oxygen evolution reaction (OER) due to their abundant valence changes and promising electrochemical activity, but low intrinsic activity hinders their practical...

As one of the semi-reactions of water splitting, electrocatalytic oxygen evolution reaction (OER) is a key process to generate sustainable energy. Co-based spinel oxides are deemed as promising OER electrocatalysts,...

Single-crystal-to-single-crystal (SCSC) transformations provide more possibilities for phase transitions, which have attracted great attention in crystal engineering. In this paper, we report a series of reversible SCSC transformations between nanoscale two-dimensional layered double hydroxide (LDH) crystals and three-dimensional metal–organic framework crystals. They can proceed not only in solution systems but also on the surface of solid-state polyacrylonitrile films and fibers. Specifically, reversible SCSC transformations can be carried out between nanoscale ZIF-67 and Co-LDH. The Co-LDH nanomaterials displayed excellent oxygen evolution reaction performance. This work has good universality and scalability, which provides a novel avenue for the synthesis of crystal materials and is of great significance for the recycling of resources.

Transition metal chalcogenides (TMCs) have been widely explored and utilized in sodium-ion battery (SIB) anodes due to their unique advantages such as high theoretical specific capacity and low cost. However,...