Electrocatalytic Synthesis of Hydrogen Peroxide

Electrocatalytic synthesis of hydrogen peroxide harnesses the two-electron oxygen reduction reaction (ORR) to convert molecular oxygen into H₂O₂ directly at the electrode–electrolyte interface. This route offers a decentralised, energy-efficient alternative to the conventional anthraquinone process, eliminating the need for large-scale centralised facilities and extensive separation steps. Progress in catalyst design has centred on tailoring electronic structures through heteroatom doping, single-atom and dual-atom active sites, and interfacial engineering to balance activity and selectivity. Advances in understanding the role of functional groups, defect sites and adsorption energies of key intermediates have led to catalysts with low overpotentials, high Faradaic efficiencies and industrially relevant current densities. These developments pave the way for on-site, continuous H₂O₂ generation across acidic, neutral and alkaline media, with significant implications for disinfection, wastewater treatment and green chemical synthesis.

Research from Nature Portfolio

Recent studies have employed theoretical screening combined with precision synthesis to create transition-metal single-site catalysts that deliver near-unity selectivity for H₂O₂ at high current densities. By using the *OOH adsorption energy as a descriptor, one work identified a cobalt single-site configuration achieving faradaic efficiencies above 96% and production rates exceeding 11 000 mmol h⁻¹ g⁻¹ under industrial conditions. Another approach manipulated the coordination of pyrrolic nitrogen sites in a graphene–mesoporous carbon composite to regulate *OOH binding geometry, yielding sustained H₂O₂ generation rates of around 30 mol g⁻¹ h⁻¹ with over 80% efficiency and excellent durability. A third advance synthesised antimony single atoms on nitrogen-sulfur co-doped carbon nanofibres via an Sb₂S₃ template, demonstrating continuous flow-cell operation with selectivities above 97% and high mass activities in alkaline electrolyte.

Electrocatalytic Synthesis of Hydrogen Peroxide publication trend

The graph below shows the total number of articles in electrocatalytic synthesis of hydrogen peroxide across all publications each year (not limited to Nature Index journals).

Technical terms

Two-electron oxygen reduction reaction (2e⁻ ORR): Electrochemical pathway reducing O₂ to H₂O₂ via transfer of two electrons.

Faradaic efficiency: Proportion of electric charge that contributes to the formation of the target chemical product.

Single-atom catalyst: Catalyst where isolated metal atoms are dispersed on a support, optimising active site utilisation.

Overpotential: Additional potential beyond the thermodynamic requirement necessary to drive an electrochemical reaction at a given rate.

*OOH intermediate: Adsorbed hydroperoxyl species formed during oxygen reduction, whose binding strength governs reaction selectivity.

References

1. Strategies for Sustainable Production of Hydrogen Peroxide via Oxygen Reduction Reaction: From Catalyst Design to Device Setup. Nano-Micro Letters (2023).
2. Metal single-site catalyst design for electrocatalytic production of hydrogen peroxide at industrial-relevant currents. Nature Communications (2023).
3. Facilitating two-electron oxygen reduction with pyrrolic nitrogen sites for electrochemical hydrogen peroxide production. Nature Communications (2023).
4. Sb2S3-templated synthesis of sulfur-doped Sb-N-C with hierarchical architecture and high metal loading for H2O2 electrosynthesis. Nature Communications (2023).