Effect of Organic Cations on Hydrogen Oxidation Reaction of Carbon Supported Platinum
Abstract
Effect of organic cations on hydrogen oxidation reaction (HOR) of carbon supported platinum (Pt/C) is investigated using three 0.1 M alkaline electrolytes, tetramethylammonium hydroxide (TMAOH), tetrabutylammonium hydroxide (TBAOH) and tetrabutylphosphonium hydroxide (TBPOH). Rotating disk electrode experiments indicate that the HOR of Pt/C is adversely impacted by time-dependent and potential-driven chemisorption of organic cations. In-situ infrared reflection adsorption spectroscopy experiments indicated that the specific chemisorption of organic cations drives the hydroxide co-adsorption on Pt surface. The co-adsorption of TMA+ and hydroxide at 0.1 V vs. reversible hydrogen electrode is the strongest; consequently, complete removal of the co-adsorbed layer from Pt surface is difficult even after exposure the Pt surface to 1.2 V. Conversely, the chemisorption of TBP+ is the weakest, yet notable decrease of HOR current density is still observed. The adsorption energies, ΔE, for TMA+, TBA+, and TBP+ on Pt (111) surface from density functional theory are computed to be -2.79, -2.42 and -2.00 eV, respectively. The relatively low adsorption energy of TBP+ is explained by the steric hindrance and electronic effect. This study emphasizes the importance of cationic group on HOR activity of alkaline anion exchange membrane fuel cells.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
- Rensselaer Polytechnic Inst., Troy, NY (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1345940
- Report Number(s):
- LA-UR-16-26356
Journal ID: ISSN 0013-4651
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 163; Journal Issue: 14; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Energy Sciences
Citation Formats
Chung, Hoon Taek, Choe, Yong-Kee, Martinez, Ulises, Dumont, Joseph Henry, Monahty, Angela, Bae, Chulsung, Matanovic, Ivana, and Kim, Yu Seung. Effect of Organic Cations on Hydrogen Oxidation Reaction of Carbon Supported Platinum. United States: N. p., 2016.
Web. doi:10.1149/2.0511614jes.
Chung, Hoon Taek, Choe, Yong-Kee, Martinez, Ulises, Dumont, Joseph Henry, Monahty, Angela, Bae, Chulsung, Matanovic, Ivana, & Kim, Yu Seung. Effect of Organic Cations on Hydrogen Oxidation Reaction of Carbon Supported Platinum. United States. https://doi.org/10.1149/2.0511614jes
Chung, Hoon Taek, Choe, Yong-Kee, Martinez, Ulises, Dumont, Joseph Henry, Monahty, Angela, Bae, Chulsung, Matanovic, Ivana, and Kim, Yu Seung. Wed .
"Effect of Organic Cations on Hydrogen Oxidation Reaction of Carbon Supported Platinum". United States. https://doi.org/10.1149/2.0511614jes. https://www.osti.gov/servlets/purl/1345940.
@article{osti_1345940,
title = {Effect of Organic Cations on Hydrogen Oxidation Reaction of Carbon Supported Platinum},
author = {Chung, Hoon Taek and Choe, Yong-Kee and Martinez, Ulises and Dumont, Joseph Henry and Monahty, Angela and Bae, Chulsung and Matanovic, Ivana and Kim, Yu Seung},
abstractNote = {Effect of organic cations on hydrogen oxidation reaction (HOR) of carbon supported platinum (Pt/C) is investigated using three 0.1 M alkaline electrolytes, tetramethylammonium hydroxide (TMAOH), tetrabutylammonium hydroxide (TBAOH) and tetrabutylphosphonium hydroxide (TBPOH). Rotating disk electrode experiments indicate that the HOR of Pt/C is adversely impacted by time-dependent and potential-driven chemisorption of organic cations. In-situ infrared reflection adsorption spectroscopy experiments indicated that the specific chemisorption of organic cations drives the hydroxide co-adsorption on Pt surface. The co-adsorption of TMA+ and hydroxide at 0.1 V vs. reversible hydrogen electrode is the strongest; consequently, complete removal of the co-adsorbed layer from Pt surface is difficult even after exposure the Pt surface to 1.2 V. Conversely, the chemisorption of TBP+ is the weakest, yet notable decrease of HOR current density is still observed. The adsorption energies, ΔE, for TMA+, TBA+, and TBP+ on Pt (111) surface from density functional theory are computed to be -2.79, -2.42 and -2.00 eV, respectively. The relatively low adsorption energy of TBP+ is explained by the steric hindrance and electronic effect. This study emphasizes the importance of cationic group on HOR activity of alkaline anion exchange membrane fuel cells.},
doi = {10.1149/2.0511614jes},
journal = {Journal of the Electrochemical Society},
number = 14,
volume = 163,
place = {United States},
year = {Wed Nov 02 00:00:00 EDT 2016},
month = {Wed Nov 02 00:00:00 EDT 2016}
}
Web of Science
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