Recent Progress on Photoelectrochemical Biomass‐Derived Platform Molecules Conversion Coupled With Hydrogen Evolution

The photoelectrochemical (PEC) oxidation and reduction processes are a sustainable method for generating high‐value compounds and sustainable hydrogen. In a typical photoelectrochemical system for water splitting, the photocathode undergoes a reduction reaction to produce hydrogen, while the product on the anode is oxygen. As well, the kinetics of the photoanodic response in this process are slow, which reduces the efficiency of hydrogen evolution. Based on research, photoelectrochemical technology has the potential to be applied in the conversion of biomass‐derived platform molecules. Through PEC conversion, biomass‐derived platform molecules can not only enhance hydrogen production efficiency but also generate valuable chemicals as byproducts. This review primarily focuses on the PEC conversion of alcohols, phenols, aldehydes, lignin, and other biomasses, and explores the different mechanisms that facilitate the synergistic evolution of hydrogen. Additionally, we examine the prospects and challenges in this research field while summarizing the current state of PEC technology in biomass conversion and hydrogen evolution.