Photocatalytic Hydrogen Evolution: Innovations and Prospects

Dear Colleagues,

The urgent global transition toward renewable energy sources has placed unprecedented focus on green hydrogen as a versatile energy carrier. Unlike conventional fossil-fuel-based hydrogen production, photocatalytic water splitting offers a truly sustainable pathway by directly harnessing sunlight to generate hydrogen from water. Despite decades of research, the field stands at a critical juncture where fundamental scientific breakthroughs must translate into tangible technological progress.

In recent years, the field has witnessed remarkable innovations, moving beyond traditional metal oxides to explore advanced materials such as metal–organic frameworks (MOFs), covalent organic frameworks (COFs), metal halide perovskites and plasmonic nanostructures. Simultaneously, a deeper mechanistic understanding of charge-carrier dynamics, surface reaction kinetics and co-catalyst functionality has been achieved through operando spectroscopy and theoretical calculations. Despite significant progress, challenges regarding solar-to-hydrogen (STH) efficiency, long-term photostability and scalable reactor design remain.

This Special Issue aims to highlight the latest breakthroughs and address the persistent challenges in this dynamic field. We invite contributions covering the design of novel photocatalysts, mechanistic investigations and advanced characterization techniques. By bringing together cutting-edge research and forward-looking perspectives, this issue seeks to illuminate the path toward viable and efficient photocatalytic hydrogen production.

If you would like to submit papers for publication in this Special Issue or have any questions, please contact the in-house Editor, Mr. Ives Liu (ives.liu@mdpi.com).

Dr. Dongbo Xu
Guest Editor

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