Coordinating Etching Inspired Synthesis of noble-metal-free monodisperse high-entropy oxides hollow nanocubes libraries

High-entropy oxides (HEOs) consist of multiple principal metal cations and oxygen anions, which enhances compositional versatility and promotes the emergence of atypical properties within oxide materials. Nonetheless, precisely shaping HEOs in hollow nanostructures remains a significant challenge due to the disparate nucleation and growth kinetics of the various metal oxide compositions in HEOs. Herein, we present a general strategy for the versatile synthesis of multicomponent hollow nanocubes HEOs libraries from ternary to octonary. A template-assisted route inspired by coordinating etching was utilized for the synthesis of HEOs hollow nanocubes through meticulous selection of the coordinating etchant and optimization of the reaction conditions. This distinctive approach demonstrates the potential for precisely designing high-quality HEOs hollow nanocubes with diverse compositions at room temperature, which potentially manifest promising prospects for various applications.