Photocatalytic Alcohol Oxidation for Hydrogen Production

Photocatalytic alcohol oxidation for hydrogen production harnesses light energy to drive the partial oxidation of alcohol substrates, typically yielding carbonyl compounds alongside the evolution of molecular hydrogen. This dual‐function approach addresses both the generation of value‐added organic chemicals and the production of clean fuel, integrating green chemistry principles with solar‐driven processes. Central to this strategy is the design of semiconductor‐based photocatalysts that absorb visible or ultraviolet light to create electron–hole pairs. Photogenerated holes selectively activate the C–H or O–H bonds in alcohols, steering the reaction towards aldehydes or ketones, while electrons reduce protons to H₂. Advances in band‐structure engineering, cocatalyst loading and nanostructuring have significantly enhanced charge‐separation efficiency, selectivity and overall quantum yields. The technology holds promise for decentralised hydrogen generation, biomass valorisation and sustainable fine‐chemical synthesis, with ongoing efforts directed at broadening substrate scope, improving catalyst stability and scaling up under solar irradiation.

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Photocatalytic Alcohol Oxidation for Hydrogen Production publication trend

The graph below shows the total number of articles in photocatalytic alcohol oxidation for hydrogen production across all publications each year (not limited to Nature Index journals).

Technical terms

Photocatalysis: Light‐driven catalytic process in which a semiconductor absorbs photons to generate reactive charge carriers.

Electron–hole pair: A pair of photogenerated charge carriers consisting of a free electron and a positively charged vacancy (hole) in a semiconductor.

Cocatalyst: A secondary catalyst, often a metal nanoparticle or co-absorber, that facilitates charge separation or redox reactions on the photocatalyst surface.

Photoredox: Redox chemistry triggered by light‐induced electron transfer, enabling simultaneous oxidation and reduction reactions.

Heterostructure: A composite of two or more semiconductors with differing band structures, designed to improve charge separation and transfer.

References

1. Highly Selective Anaerobic Oxidation of Alcohols Over Fe‐doped SrTiO3 Under Visible Light. ChemCatChem (2019).
2. Heterostructure-Engineered Semiconductor Quantum Dots toward Photocatalyzed-Redox Cooperative Coupling Reaction. Research (2023).
3. Photocatalytic Anaerobic Oxidation of Aromatic Alcohols Coupled With H2 Production Over CsPbBr3/GO-Pt Catalysts. Frontiers in Chemistry (2022).