Journal
CURRENT OPINION IN ELECTROCHEMISTRY
Volume 25, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.coelec.2020.100644
Keywords
Electrocatalysis; Confinement; Selectivity; Oxygen reduction reaction; CO2 reduction reaction
Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the collaborative research centre/transregio 'Heterogeneous oxidation catalysis in the liquid phase' [TRR 247 [388390466]]
- Forschungsgemeinschaft (DFG, German Research Foundation) within the research unit 'Multi-scale analysis of complex three-phase systems: oxygen and CO2 reduction on Ag gas-diffusion electrodes in aqueous electrolyte' [FOR 2397-2 (276655237)]
- BMBF [03XP0263]
- DAAD
- Australian Research Council of Centre of Excellence in Convergent Bio-Nano Science and Technology [CE140100036]
- ARC [FL150100060, DP190102659]
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When electrodes are rough, three-dimensionally mesoporous or nanoporous, the restricted mass transport can lead to local accumulation or depletion of various substances, influencing reactions at the active sites of electrocatalysts. This influence is crucial for both the activity and selectivity of electrocatalytic reactions, and has been a topic of growing awareness in recent years.
The complex interplay of restricted mass transport leading to local accumulation or depletion of educts, intermediates, products, counterions and co-ions influences the reactions at the active sites of electrocatalysts when electrodes are rough, three-dimensionally mesoporous or nanoporous. This influence is important with regard to activity, and even more to selectivity, of electrocatalytic reactions. The underlying principles are discussed based on the growing awareness of these considerations over recent years.
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