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

Elena Madrid, John Lowe, Kadhum J. Msayib, Neil B. Mckeown, Qilei Song, Gary A. Attard, Tina Duren, Frank Marken

Research output: Contribution to journalArticle

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 positive.
LanguageEnglish
JournalChemElectroChem
Early online date12 Mar 2018
DOIs
StatusE-pub ahead of print - 12 Mar 2018

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Microporosity
Catalysis
Hydrogen
Polymers
Oxygen
Electrodes
Gases
Glassy carbon
Voltammetry
Platinum
Energy conversion
Electrolytes
Buffers
Phosphates
Nanoparticles
Coatings
Oxidation

Cite this

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title = "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",
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 positive.",
author = "Elena Madrid and John Lowe and Msayib, {Kadhum J.} and Mckeown, {Neil B.} and Qilei Song and Attard, {Gary A.} and Tina Duren and Frank Marken",
year = "2018",
month = "3",
day = "12",
doi = "10.1002/celc.201800177",
language = "English",
journal = "ChemElectroChem",
issn = "2196-0216",
publisher = "John Wiley and Sons Inc.",

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T1 - 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

AU - Madrid,Elena

AU - Lowe,John

AU - Msayib,Kadhum J.

AU - Mckeown,Neil B.

AU - Song,Qilei

AU - Attard,Gary A.

AU - Duren,Tina

AU - Marken,Frank

PY - 2018/3/12

Y1 - 2018/3/12

N2 - 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 positive.

AB - 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 positive.

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JO - ChemElectroChem

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