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Title: Exploring substrate/ionomer interaction under oxidizing and reducing environments

Abstract

Local gas transport limitation attributed to the ionomer thin-film in the catalyst layer is a major deterrent to widespread commercialization of polymer-electrolyte fuel cells. So far functionality and limitations of these thin-films have been assumed identical in the anode and cathode. In this study, Nafion ionomer thin-films on platinum(Pt) support were exposed to H2 and air as model schemes, mimicking anode and cathode catalyst layers. Findings indicate decreased swelling, increased densification of ionomer matrix, and increased humidity-induced aging rates in reducing environment, compared to oxidizing and inert environments. Observed phenomenon could be related to underlying Pt-gas interaction dictating Pt-ionomer behavior. Presented results could have significant implications about the disparate behavior of ionomer thin-film in anode and cathode catalyst layers.

Authors:
 [1];  [2];  [1];  [3]; ORCiD logo [3]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Technologies Area
  2. Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Technologies Area
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1440958
Alternate Identifier(s):
OSTI ID: 1702991
Grant/Contract Number:  
AC02-05CH11231; DGE-1106400
Resource Type:
Accepted Manuscript
Journal Name:
Electrochemistry Communications
Additional Journal Information:
Journal Volume: 87; Journal Issue: C; Journal ID: ISSN 1388-2481
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Hydrogen; Fuel cell; Ionomer Thin-film; Confinement; Platinum Interface

Citation Formats

Tesfaye, Meron, MacDonald, Andrew N., Dudenas, Peter J., Kusoglu, Ahmet, and Weber, Adam Z.. Exploring substrate/ionomer interaction under oxidizing and reducing environments. United States: N. p., 2018. Web. https://doi.org/10.1016/j.elecom.2018.01.004.
Tesfaye, Meron, MacDonald, Andrew N., Dudenas, Peter J., Kusoglu, Ahmet, & Weber, Adam Z.. Exploring substrate/ionomer interaction under oxidizing and reducing environments. United States. https://doi.org/10.1016/j.elecom.2018.01.004
Tesfaye, Meron, MacDonald, Andrew N., Dudenas, Peter J., Kusoglu, Ahmet, and Weber, Adam Z.. Fri . "Exploring substrate/ionomer interaction under oxidizing and reducing environments". United States. https://doi.org/10.1016/j.elecom.2018.01.004. https://www.osti.gov/servlets/purl/1440958.
@article{osti_1440958,
title = {Exploring substrate/ionomer interaction under oxidizing and reducing environments},
author = {Tesfaye, Meron and MacDonald, Andrew N. and Dudenas, Peter J. and Kusoglu, Ahmet and Weber, Adam Z.},
abstractNote = {Local gas transport limitation attributed to the ionomer thin-film in the catalyst layer is a major deterrent to widespread commercialization of polymer-electrolyte fuel cells. So far functionality and limitations of these thin-films have been assumed identical in the anode and cathode. In this study, Nafion ionomer thin-films on platinum(Pt) support were exposed to H2 and air as model schemes, mimicking anode and cathode catalyst layers. Findings indicate decreased swelling, increased densification of ionomer matrix, and increased humidity-induced aging rates in reducing environment, compared to oxidizing and inert environments. Observed phenomenon could be related to underlying Pt-gas interaction dictating Pt-ionomer behavior. Presented results could have significant implications about the disparate behavior of ionomer thin-film in anode and cathode catalyst layers.},
doi = {10.1016/j.elecom.2018.01.004},
journal = {Electrochemistry Communications},
number = C,
volume = 87,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: (a) Humidity protocol applied during in-situ tracking of spin-cast Nafion thin-films (~50 nm) (b) % Change in thickness on Pt and Si/SiO2 substrate under H2 and Air environments as a function of relative-humidity.

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Works referenced in this record:

The Priority and Challenge of High-Power Performance of Low-Platinum Proton-Exchange Membrane Fuel Cells
journal, March 2016


Unexplained transport resistances for low-loaded fuel-cell catalyst layers
journal, January 2014

  • Weber, Adam Z.; Kusoglu, Ahmet
  • J. Mater. Chem. A, Vol. 2, Issue 41
  • DOI: 10.1039/C4TA02952F

Pt-Oxide Coverage-Dependent Oxygen Reduction Reaction (ORR) Kinetics
journal, January 2012

  • Subramanian, N. P.; Greszler, T. A.; Zhang, J.
  • Journal of The Electrochemical Society, Vol. 159, Issue 5
  • DOI: 10.1149/2.088205jes

Atomistic Adsorption of Oxygen and Hydrogen on Platinum Catalysts by Hybrid Grand Canonical Monte Carlo/Reactive Molecular Dynamics
journal, April 2016

  • Gai, Lili; Shin, Yun Kyung; Raju, Muralikrishna
  • The Journal of Physical Chemistry C, Vol. 120, Issue 18
  • DOI: 10.1021/acs.jpcc.6b01064

New Insights into Perfluorinated Sulfonic-Acid Ionomers
journal, January 2017


Coadsorption of Hydrogen and Carbon Monoxide on (111) Platinum
journal, January 1971

  • Baldwin, Vaniah H.; Hudson, John B.
  • Journal of Vacuum Science and Technology, Vol. 8, Issue 1
  • DOI: 10.1116/1.1316351

Control factor of native oxide growth on silicon in air or in ultrapure water
journal, August 1989

  • Morita, M.; Ohmi, T.; Hasegawa, E.
  • Applied Physics Letters, Vol. 55, Issue 6
  • DOI: 10.1063/1.102435

Growth of native oxide on a silicon surface
journal, August 1990

  • Morita, M.; Ohmi, T.; Hasegawa, E.
  • Journal of Applied Physics, Vol. 68, Issue 3, p. 1272-1281
  • DOI: 10.1063/1.347181

    Works referencing / citing this record:

    Cross-correlated humidity-dependent structural evolution of Nafion thin films confined on a platinum substrate
    journal, January 2020

    • Shrivastava, Udit N.; Suetsugu, Kota; Nagano, Shusaku
    • Soft Matter, Vol. 16, Issue 5
    • DOI: 10.1039/c9sm01731c

    Substrate‐Dependent Molecular and Nanostructural Orientation of Nafion Thin Films
    journal, July 2019

    • Kushner, Douglas I.; Kusoglu, Ahmet; Podraza, Nikolas J.
    • Advanced Functional Materials, Vol. 29, Issue 37
    • DOI: 10.1002/adfm.201902699

    Dual Cross‐linked Vinyl Vitrimer with Efficient Self‐Catalysis Achieving Triple‐Shape‐Memory Properties
    journal, August 2019

    • Niu, Xiling; Wang, Fenfen; Kui, Xing
    • Macromolecular Rapid Communications, Vol. 40, Issue 19
    • DOI: 10.1002/marc.201900313

      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.