Flexible and Extensive Platinum Ion Gel Condensers for Programmable Catalysis

Tzia Ming Onn, Kyung Ryul Oh, Demetra Z. Adrahtas, Jimmy K. Soeherman, Justin A. Hopkins, C. Daniel Frisbie, Paul J. Dauenhauer

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Catalytic condensers composed of ion gels separating a metal electrode from a platinum-on-carbon active layer were fabricated and characterized to achieve more powerful, high surface area dynamic heterogeneous catalyst surfaces. Ion gels comprised of poly(vinylidene difluoride)/1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide were spin coated as a 3.8 μm film on a Au surface, after which carbon sputtering of a 1.8 nm carbon film and electron-beam evaporation of 2 nm Pt clusters created an active surface exposed to reactant gases. Electronic characterization indicated that most charge condensed within the Pt nanoclusters upon application of a potential bias, with the condenser device achieving a capacitance of ∼20 μF/cm2 at applied frequencies of up to 120 Hz. The maximum charge of ∼1014 |e-| cm-2 was condensed under stable device conditions at 200 °C on catalytic films with ∼1015 sites cm-2. Grazing incidence infrared spectroscopy measured carbon monoxide adsorption isobars, indicating a change in the CO* binding energy of ∼19 kJ mol-1 over an applied potential bias of only 1.25 V. Condensers were also fabricated on flexible, large area Kapton substrates allowing stacked or tubular form factors that facilitate high volumetric active site densities, ultimately enabling a fast and powerful catalytic condenser that can be fabricated for programmable catalysis applications.

Original languageEnglish (US)
Pages (from-to)983-995
Number of pages13
JournalACS nano
Volume18
Issue number1
DOIs
StatePublished - Jan 9 2024

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society

Keywords

  • Catalysis
  • Condenser
  • Dynamics
  • Energy
  • Ion Gel
  • Storage

PubMed: MeSH publication types

  • Journal Article

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