Synergistic strategies in MOF on MOF photocatalysts: Review on exploring sustainable hydrogen generation from water splitting

Abstract

Hydrogen is seen as a very promising, environmentally friendly, and sustainable energy carrier, presenting an appealing substitute for fossil fuels. Photocatalysis, derived hydrogen from water splitting, is often regarded as the most effective method for meeting long-term sustainability goals and satisfying growing energy needs. This article provides a concise overview of the process by which hydrogen is produced by water splitting, using various MOFs and MOF on MOF photocatalysts. MOFs are a very promising category of porous crystalline materials that exhibit a wide range of uses. The extensive investigation of MOFs has resulted in the development of MOF on MOF hybrid materials. This study also elucidates the synthetic approaches that explain the interaction between the host and guest MOFs. Next, the text delves into a comprehensive analysis of the structural variety to showcase how MOF on MOF hybrids facilitates progress in photocatalytic applications. Despite their potential, MOFs still face several constraints that need to be addressed. This work emphasizes the main obstacles in the area of water splitting and suggests the potential use of photocatalysts for this purpose. The extensive surface area of MOF on MOF hybrids also amplifies hydrogen generation during photocatalysis, assisted by effective separation and transmission of electron holes. These photocatalysts generate environmentally friendly hydrogen from water, promoting global progress without causing damage to the environment and perhaps contributing to the development of renewable energy sources. The review concludes by examining possible avenues for future research in the field of photocatalysis for the production of sustainable hydrogen as an energy source.