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Title: Resolving Challenges of Mass Transport in Non Pt-Group Metal Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells

Abstract

Mass transport properties of a pair of non-Platinum Group Metal (non-PGM) catalysts in proton exchange membrane fuel cells (PEMFCs) were evaluated through methods developed by Reshetenko et al., demonstrating that the use of different carrier gases can allow for the determination of the mass transport coefficient for oxygen in the gas phase and the electrolyte phase. The gas-phase and non-gas-phase resistances can be elucidated from the slope and intercept, respectively, of the total mass transport coefficient plotted as a function of molecular weight. It was determined through these experiments that the primary sources of mass transfer limitations of the non-PGMs when compared to the PGMs were the catalyst layer (non-gas-phase), rather than the flow fields (gas-phase, primarily Knudsen Diffusion effects), and the gas diffusion layer. This work was combined with a pseudo-2D, isothermal, steady state numerical model to estimate the gas-phase mass transfer coefficient and the fraction of hydrophobic, gas-phase pores in the catalyst layer. Furthermore sensitivity studies were also carried out, allowing for more information regarding the influence of several inherent factors on the mass transport limitations, and allow for additional validation of the model beyond simply the quality of the fit.

Authors:
ORCiD logo; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Northeastern Univ., Boston, MA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1439252
Alternate Identifier(s):
OSTI ID: 1509903
Grant/Contract Number:  
EE0000459
Resource Type:
Published Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Name: Journal of the Electrochemical Society Journal Volume: 165 Journal Issue: 9; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; fuel cells; mass transport studies; non-PGM catalysts

Citation Formats

Pavlicek, Ryan, Barton, Scott Calabrese, Leonard, Nathaniel, Romero, Henry, McKinney, Sam, McCool, Geoffrey, Serov, Alexey, Abbott, Daniel, Atanassov, Plamen, and Mukerjee, Sanjeev. Resolving Challenges of Mass Transport in Non Pt-Group Metal Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells. United States: N. p., 2018. Web. doi:10.1149/2.0141809jes.
Pavlicek, Ryan, Barton, Scott Calabrese, Leonard, Nathaniel, Romero, Henry, McKinney, Sam, McCool, Geoffrey, Serov, Alexey, Abbott, Daniel, Atanassov, Plamen, & Mukerjee, Sanjeev. Resolving Challenges of Mass Transport in Non Pt-Group Metal Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells. United States. doi:10.1149/2.0141809jes.
Pavlicek, Ryan, Barton, Scott Calabrese, Leonard, Nathaniel, Romero, Henry, McKinney, Sam, McCool, Geoffrey, Serov, Alexey, Abbott, Daniel, Atanassov, Plamen, and Mukerjee, Sanjeev. Sat . "Resolving Challenges of Mass Transport in Non Pt-Group Metal Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells". United States. doi:10.1149/2.0141809jes.
@article{osti_1439252,
title = {Resolving Challenges of Mass Transport in Non Pt-Group Metal Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells},
author = {Pavlicek, Ryan and Barton, Scott Calabrese and Leonard, Nathaniel and Romero, Henry and McKinney, Sam and McCool, Geoffrey and Serov, Alexey and Abbott, Daniel and Atanassov, Plamen and Mukerjee, Sanjeev},
abstractNote = {Mass transport properties of a pair of non-Platinum Group Metal (non-PGM) catalysts in proton exchange membrane fuel cells (PEMFCs) were evaluated through methods developed by Reshetenko et al., demonstrating that the use of different carrier gases can allow for the determination of the mass transport coefficient for oxygen in the gas phase and the electrolyte phase. The gas-phase and non-gas-phase resistances can be elucidated from the slope and intercept, respectively, of the total mass transport coefficient plotted as a function of molecular weight. It was determined through these experiments that the primary sources of mass transfer limitations of the non-PGMs when compared to the PGMs were the catalyst layer (non-gas-phase), rather than the flow fields (gas-phase, primarily Knudsen Diffusion effects), and the gas diffusion layer. This work was combined with a pseudo-2D, isothermal, steady state numerical model to estimate the gas-phase mass transfer coefficient and the fraction of hydrophobic, gas-phase pores in the catalyst layer. Furthermore sensitivity studies were also carried out, allowing for more information regarding the influence of several inherent factors on the mass transport limitations, and allow for additional validation of the model beyond simply the quality of the fit.},
doi = {10.1149/2.0141809jes},
journal = {Journal of the Electrochemical Society},
number = 9,
volume = 165,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1149/2.0141809jes

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