生物质辅助电解水制氢及协同制备高值化学品研究进展

The high energy consumption is the bottleneck to limiting large-scale application of water electrolysis. In recent years, it has become an important orientation to reduce the energy consumption of hydrogen production by replacing the energy-intensive oxygen evolution reaction with thermodynamically easier occurring reaction at the anode. Biomass is a low-cost carbon source with a wide range of sources. Biomass-assisted water electrolysis system can reduce the energy consumption of hydrogen production and cooperate in the production of high-value chemicals. This review summarizes the recent progress of biomass-assisted water electrolysis for hydrogen production, and introduces the principle of hydrogen production with low energy consumption and biomass oxidation path. Meanwhile, the influence of key factors on hydrogen production efficiency and biomass oxidation products is summarized. However, due to the complex molecular structure and large molecular weight of biomass, its electrochemical oxidation efficiency is low, and it needs heating to promote the electrochemical oxidation efficiency. The product selectivity is poor, and the oxidation mechanism is not clear. The key points of future research will be aimed at electrode materials, charge carriers and biomass pretreatment methods to improve hydrogen production efficiency.