Multinary materials have emerged as promising compounds for advanced energy conversion technologies due to their unique synthesis-structure-property relationships. Our research delves mainly into two key categories of multinary materials: ternary and quaternary metal oxides and high-entropy metal oxides. Ternary and quaternary metal oxides are notable for their versatility and tunability, which enhance their performance in various energy conversion applications. Their synthesis often involves complex processes that yield oxides with distinct structural frameworks, impacting their electronic, optical, and catalytic properties. These materials are explored for their roles in photoelectrocatalysis, electrocatalysis, sensors, and batteries, where they demonstrate potential for improving efficiency and stability in energy conversion and storage systems.

High-entropy metal oxides, characterized by incorporating five or more equimolar cations, benefit from an entropy-driven stabilization of a single-phase structure. This high-entropy approach results in materials with exceptional compositional complexity and stability, which can significantly impact their functionality in energy conversion and storage devices. The broad range of cations enables the fine-tuning of electronic and catalytic properties, enhancing their performance in diverse applications, including photoelectrocatalysis and electrocatalysis, and improving their durability and efficiency in sensors and batteries.

This study provides a comprehensive analysis of the synthesis techniques, structural characteristics, and resultant properties of these multinary materials, aiming to unlock their full potential in next-generation energy conversion technologies.