2016
DOI: 10.1038/srep38780
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How to Enhance Gas Removal from Porous Electrodes?

Abstract: This article presents a structure-based modeling approach to optimize gas evolution at an electrolyte-flooded porous electrode. By providing hydrophobic islands as preferential nucleation sites on the surface of the electrode, it is possible to nucleate and grow bubbles outside of the pore space, facilitating their release into the electrolyte. Bubbles that grow at preferential nucleation sites act as a sink for dissolved gas produced in electrode reactions, effectively suctioning it from the electrolyte-fille… Show more

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Cited by 102 publications
(71 citation statements)
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“…Our measurements, thus, imply that the design of structured electrodes (by placing sites of bubble growth, i.e. hydrophobic nucleation sites, adjacent to catalytically active spots) would increase the cell efficiency, something that has been suggested in the past for porous electrodes, 22 and employed most recently in the context of bubbles by van der Linde et al 9,23 for planar electrodes.…”
supporting
confidence: 54%
“…Our measurements, thus, imply that the design of structured electrodes (by placing sites of bubble growth, i.e. hydrophobic nucleation sites, adjacent to catalytically active spots) would increase the cell efficiency, something that has been suggested in the past for porous electrodes, 22 and employed most recently in the context of bubbles by van der Linde et al 9,23 for planar electrodes.…”
supporting
confidence: 54%
“…Thus in clean water, the site of O 2 production (e.g. an electrode) O 2 levels must be ∼300 times higher than saturation, close to 2.5 M, before formation of bubbles can occur (17). This concentration is needed to overcome the surface tension of 260 atm of the initial bubbles.…”
Section: Discussionmentioning
confidence: 99%
“…However, supersaturation of a gas on the surface of an electrode from which it is produced is a well-known effect. [59][60][61][62][63] Notably, smooth electrode surfaces of the type we will employ here have been shown to suppress bubble nucleation, allowing for a high degree of supersaturation.…”
Section: Simulations Of Intermediate Species Transportmentioning
confidence: 99%