Screening Bifunctional Pt Based NSTF Catalysts for Durability with the Rotating Disk Electrode: The Effect of Ir and Ru
Abstract
Various amounts of Ir (<20 μg cm -2) and Ru (up to 12 μg cm -2) on a consistent base Pt loading of 85 μg cm -2, were sputter deposited on a nanostructured thin film catalyst support to mimic a hydrogen fuel cell's cathode catalyst. The nanostructured support was grown on glassy carbon disks designed for a rotating disk electrode, which was used to simulate what happens to a fuel cell cathode during repeated start-up, operation, and shut-down. The testing protocol subjected the catalyst to a minimum potential of 0.65 V RHE and a maximum between 1.53 and 1.8 V RHE. The upper potential was achieved with a galvanostatic hold which is an alternative way to simulate potential transients on the cathode caused by start-up and shut-down. Increasing Ir loading improved the durability of both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity. When combined with Ir, Ru provided no benefit to OER durability except at an Ir loading of 10 μg cm -2. Ru addition (no Ir present) improved the ORR durability compared to pure Pt. ORR durability was not influenced by Ru addition to Ir-containing samples. In general, ORR durability showed no dependence on Ru loadingmore »
- Authors:
-
[1];
[2]
- Dalhousie Univ., Halifax, NS (Canada). Dept. of Mechanical Engineering
- Dalhousie Univ., Halifax, NS (Canada). Dept. of Mechanical Engineering and Dept. of Physics and Atmospheric Science
- Publication Date:
- Research Org.:
- 3M Co., St. Paul, MN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)
- OSTI Identifier:
- 1510047
- Grant/Contract Number:
- EE0000456
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 165; Journal Issue: 10; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; nanostructured thin film; oxygen evolution reaction; oxygen reduction reaction
Citation Formats
Crowtz, T. C., and Dahn, Jeff R. Screening Bifunctional Pt Based NSTF Catalysts for Durability with the Rotating Disk Electrode: The Effect of Ir and Ru. United States: N. p., 2018.
Web. doi:10.1149/2.0891810jes.
Crowtz, T. C., & Dahn, Jeff R. Screening Bifunctional Pt Based NSTF Catalysts for Durability with the Rotating Disk Electrode: The Effect of Ir and Ru. United States. doi:10.1149/2.0891810jes.
Crowtz, T. C., and Dahn, Jeff R. Thu .
"Screening Bifunctional Pt Based NSTF Catalysts for Durability with the Rotating Disk Electrode: The Effect of Ir and Ru". United States. doi:10.1149/2.0891810jes. https://www.osti.gov/servlets/purl/1510047.
@article{osti_1510047,
title = {Screening Bifunctional Pt Based NSTF Catalysts for Durability with the Rotating Disk Electrode: The Effect of Ir and Ru},
author = {Crowtz, T. C. and Dahn, Jeff R.},
abstractNote = {Various amounts of Ir (<20 μg cm-2) and Ru (up to 12 μg cm-2) on a consistent base Pt loading of 85 μg cm-2, were sputter deposited on a nanostructured thin film catalyst support to mimic a hydrogen fuel cell's cathode catalyst. The nanostructured support was grown on glassy carbon disks designed for a rotating disk electrode, which was used to simulate what happens to a fuel cell cathode during repeated start-up, operation, and shut-down. The testing protocol subjected the catalyst to a minimum potential of 0.65 VRHE and a maximum between 1.53 and 1.8 VRHE. The upper potential was achieved with a galvanostatic hold which is an alternative way to simulate potential transients on the cathode caused by start-up and shut-down. Increasing Ir loading improved the durability of both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity. When combined with Ir, Ru provided no benefit to OER durability except at an Ir loading of 10 μg cm-2. Ru addition (no Ir present) improved the ORR durability compared to pure Pt. ORR durability was not influenced by Ru addition to Ir-containing samples. In general, ORR durability showed no dependence on Ru loading for all the Ru containing samples and ORR activity was decreased by OER catalyst addition, though more so for Ir than Ru.},
doi = {10.1149/2.0891810jes},
journal = {Journal of the Electrochemical Society},
number = 10,
volume = 165,
place = {United States},
year = {2018},
month = {7}
}
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