Magnetic Field Effects on Electrocatalytic Performance
Summary
Electrocatalytic reactions underpin renewable energy technologies such as fuel cells, water splitting and carbon dioxide reduction. Recent studies reveal that externally applied magnetic fields can modulate reaction kinetics and selectivity through several mechanisms. First, the interaction between the magnetic field and unpaired electron spins in reactive intermediates can alter spin-dependent reaction pathways, reducing activation barriers and shifting potential–current profiles. Second, magnetohydrodynamic forces induced in electrolyte solutions enhance mass transport, diminishing concentration polarisation and boosting current densities. Third, magnetic fields can influence the electronic structure of ferromagnetic or paramagnetic catalyst materials, leading to changes in adsorption energies and surface reaction rates. Combined, these effects offer a tunable, non-invasive strategy to improve electrocatalytic performance, reducing overpotentials and increasing durability. The global significance extends from green hydrogen generation to efficient oxygen reduction in fuel cells, with implications for large-scale energy conversion and storage systems.
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Magnetic Field Effects on Electrocatalytic Performance publication trend
The graph below shows the total number of articles in magnetic field effects on electrocatalytic performance across all publications each year (not limited to Nature Index journals).
Technical terms
Electrocatalysis: Acceleration of electrochemical reactions at electrode interfaces by catalysts.
Overpotential: Additional potential beyond the thermodynamic requirement needed to achieve a specified reaction rate.
Spin polarisation: Imbalance between populations of spin-up and spin-down electrons, affecting reaction pathways.
Magnetohydrodynamic effect: Movement of charged species in a fluid under a magnetic field, enhancing mass transport and reducing concentration polarisation.
References
- The Effect of Magnetic Field on Catalytic Properties in Core-Shell Type Particles. Frontiers in Chemistry (2020).
- Review on Magnetism in Catalysis: From Theory to PEMFC Applications of 3d Metal Pt-Based Alloys. International Journal of Molecular Sciences (2022).
- The Effect of an External Magnetic Field on the Electrocatalytic Activity of Heat-Treated Cyanometallate Complexes towards the Oxygen Reduction Reaction in an Alkaline Medium. Materials (2022).
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