Electrochemical Oxidation Mechanisms of Small Organic Molecules

Electrochemical oxidation of small organic molecules encompasses a suite of reactions in which alcohols, aldehydes and acids are converted into value‐added chemicals or fully oxidised products via controlled electron transfer at electrode surfaces. Central to these processes are the adsorption and dehydrogenation steps that generate surface‐bound intermediates such as alkoxy or carbon monoxide species. The balance between direct pathways to carbon dioxide or further oxidised products and indirect routes via soluble intermediates depends on catalyst composition, surface structure and the availability of surface hydroxyl groups. Mass transport layers, cell design and operation conditions—pH, temperature and electrolyte concentration—further modulate reaction rates and selectivity. Practical applications range from direct alcohol fuel cells for portable power to sustainable synthesis of platform chemicals under mild conditions. Recent advances have revealed intricate oscillatory dynamics and uncovered the crucial role of hydroxyl‐mediated activation, paving the way for the rational design of more efficient electrocatalytic systems.

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Electrochemical Oxidation Mechanisms of Small Organic Molecules publication trend

The graph below shows the total number of articles in electrochemical oxidation mechanisms of small organic molecules across all publications each year (not limited to Nature Index journals).

Technical terms

Electrochemical oxidation: A reaction in which an organic molecule loses electrons at an electrode surface, often yielding oxidised products such as CO₂ or carbonyl compounds.

Faraday efficiency: The fraction of total electrical charge that contributes to the desired chemical transformation.

Flow cell: An electrochemical reactor in which reactants are continuously supplied and products removed, enabling stable operation at high current densities.

Adsorbed OH: Hydroxyl species bound to the electrode surface that play an active role in facilitating oxidation steps.

Oscillatory dynamics: Periodic fluctuations in electrode potential or current arising from feedback between reaction intermediates and surface coverage.

Mass transfer: The transport of reactants and products between the bulk electrolyte and the electrode interface, influencing local concentrations and reaction rates.

References

1. Sustainable electrochemical synthesis of dry formaldehyde from anhydrous methanol. Green Chemistry (2024).
2. Mass transfer phenomena induced by surface gas flow rate in the hanging meniscus configuration: A case study of the methanol electro-oxidation reaction on Pt(100). Electrochimica Acta (2023).
3. Why Methanol Electro-oxidation on Platinum in Water Takes Place Only in the Presence of Adsorbed OH. ACS Catalysis (2022).