Ultralow charge-transfer resistance with ultralow Pt loading for hydrogen evolution and oxidation using Ru@Pt core-shell nanocatalysts
Abstract
We evaluated the activities of well-defined Ru@Pt core-shell nanocatalysts for hydrogen evolution and oxidation reactions (HER-HOR) using hanging strips of gas diffusion electrode (GDE) in solution cells. With gas transport limitation alleviated by micro-porous channels in the GDEs, the charge transfer resistances (CTRs) at the hydrogen reversible potential were conveniently determined from linear fit of ohmic-loss-corrected polarization curves. In 1M HClO₄ at 23°C, a CTR as low as 0.04 Ω cm² was obtained with only 20 μg cm⁻² Pt and 11 μg cm⁻² Ru using the carbon-supported Ru@Pt with 1:1 Ru:Pt atomic ratio. Derived from temperature-dependent CTRs, the activation barrier of the Ru@Pt catalyst for the HER-HOR in acids is 0.2 eV or 19 kJ mol⁻¹. Using the Ru@Pt catalyst with total metal loadings <50 μg cm⁻² for the HER in proton-exchange-membrane water electrolyzers, we recorded uncompromised activity and durability compared to the baseline established with 3 mg cm⁻² Pt black.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Proton OnSite, Wallingford, CT (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1213359
- Report Number(s):
- BNL-108148-2015-JA
Journal ID: ISSN 2045-2322; R&D Project: MA510MAEA; KC0302010
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 21; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Ru-Pt core-shell catalysts; HER; HOR; electrolysis
Citation Formats
Wang, Jia X., Zhang, Yu, Capuano, Christopher B., and Ayers, Katherine E. Ultralow charge-transfer resistance with ultralow Pt loading for hydrogen evolution and oxidation using Ru@Pt core-shell nanocatalysts. United States: N. p., 2015.
Web. doi:10.1038/srep12220.
Wang, Jia X., Zhang, Yu, Capuano, Christopher B., & Ayers, Katherine E. Ultralow charge-transfer resistance with ultralow Pt loading for hydrogen evolution and oxidation using Ru@Pt core-shell nanocatalysts. United States. https://doi.org/10.1038/srep12220
Wang, Jia X., Zhang, Yu, Capuano, Christopher B., and Ayers, Katherine E. Wed .
"Ultralow charge-transfer resistance with ultralow Pt loading for hydrogen evolution and oxidation using Ru@Pt core-shell nanocatalysts". United States. https://doi.org/10.1038/srep12220. https://www.osti.gov/servlets/purl/1213359.
@article{osti_1213359,
title = {Ultralow charge-transfer resistance with ultralow Pt loading for hydrogen evolution and oxidation using Ru@Pt core-shell nanocatalysts},
author = {Wang, Jia X. and Zhang, Yu and Capuano, Christopher B. and Ayers, Katherine E.},
abstractNote = {We evaluated the activities of well-defined Ru@Pt core-shell nanocatalysts for hydrogen evolution and oxidation reactions (HER-HOR) using hanging strips of gas diffusion electrode (GDE) in solution cells. With gas transport limitation alleviated by micro-porous channels in the GDEs, the charge transfer resistances (CTRs) at the hydrogen reversible potential were conveniently determined from linear fit of ohmic-loss-corrected polarization curves. In 1M HClO₄ at 23°C, a CTR as low as 0.04 Ω cm² was obtained with only 20 μg cm⁻² Pt and 11 μg cm⁻² Ru using the carbon-supported Ru@Pt with 1:1 Ru:Pt atomic ratio. Derived from temperature-dependent CTRs, the activation barrier of the Ru@Pt catalyst for the HER-HOR in acids is 0.2 eV or 19 kJ mol⁻¹. Using the Ru@Pt catalyst with total metal loadings <50 μg cm⁻² for the HER in proton-exchange-membrane water electrolyzers, we recorded uncompromised activity and durability compared to the baseline established with 3 mg cm⁻² Pt black.},
doi = {10.1038/srep12220},
journal = {Scientific Reports},
number = 21,
volume = 5,
place = {United States},
year = {Wed Jul 15 00:00:00 EDT 2015},
month = {Wed Jul 15 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
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