Triphasic nature of polymers of intrinsic microporosity (PIM-1 and PIM-PY) induces storage and catalysis effects in hydrogen and oxygen reactivity at electrode surfaces
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Hydrogen oxidation and oxygen reduction are two crucial energy conversion reactions, which are shown to be both strongly affected by the presence of intrinsically microporous polymer coatings on electrodes. Polymers of intrinsic microporosity (PIMs) are known to possess extremely high internal surface area and ability to bind gases under dry conditions. It is shown here that both, hydrogen‐ and oxygen gas binding into PIMs, also occurs under wet or “triphasic” conditions in aqueous electrolyte environments (when immersed in 0.01 M phosphate buffer at pH 7). For two known PIM materials (PIM‐1 and PIM‐PY), nanoparticles are formed by an anti‐solvent precipitation protocol and then cast as a film onto platinum or glassy carbon electrodes. Voltammetry experiments reveal evidence for hydrogen and oxygen binding. Both, PIM‐1 and PIM‐PY, locally store hydrogen or oxygen gas at the electrode surface and thereby significantly affect electrocatalytic reactivity. The onset of oxygen reduction on glassy carbon is shifted by 0.15 V in the positive direction.
Date Issued
2019-01-02
Date Acceptance
2018-03-12
Citation
ChemElectroChem, 2019, 6, pp.252-259
ISSN
2196-0216
Publisher
Wiley
Start Page
252
End Page
259
Journal / Book Title
ChemElectroChem
Volume
6
Copyright Statement
© 2018 Owner. This is the accepted version of the following article: E. Madrid, J. P. Lowe, K. J. Msayib, N. B. McKeown, Q. Song, G. A. Attard, T. Düren, F. Marken, ChemElectroChem 2019, 6, 252., which has been published in final form at https://doi.org/10.1002/celc.201800177.
Subjects
Science & Technology
Physical Sciences
Electrochemistry
carbon dioxide
diffusion
electrocatalysis
modified electrode
voltammetry
CARBON-DIOXIDE
FILM
CARBONIZATION
ADSORPTION
EVOLUTION
CAPTURE
METHANE
DESIGN
Publication Status
Published
Date Publish Online
2018-04-14