Phenyl Oxidation Impacts the Durability of Alkaline Membrane Water Electrolyzer
Abstract
The durability of alkaline anion exchange membrane (AEM) electrolyzers is a critical requirement for implementing this technology in cost-effective hydrogen production. Here, we report that the electrochemical oxidation of the adsorbed phenyl group (found in the ionomer) on oxygen evolution catalysts produces phenol, which may cause performance deterioration in AEM electrolyzers. In-line 1H NMR kinetic analyses of phenyl oxidation in a model organic cation electrolyte shows that catalyst type significantly impacts the phenyl oxidation rate at an oxygen evolution potential. Density functional theory calculations show that the phenyl adsorption is a critical factor determining the phenyl oxidation. This research provides a path for the development of more durable AEM electrolyzers with components that can minimize the adverse impact induced by the phenyl group oxidation, such as the development of novel ionomers with fewer phenyl moieties or catalysts with less phenyl-adsorbing character.
- Authors:
-
[2];
[1];
[1];
[1];
[1]
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of New Mexico, Albuquerque, NM (United States). Center for Micro-Engineered Materials (CMEM), Dept. of Chemical and Biological Engineering; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Nanoscale Sciences Dept.
- 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), Sustainable Transportation Office. Hydrogen Fuel Cell Technologies Office
- OSTI Identifier:
- 1503198
- Report Number(s):
- LA-UR-19-20066
Journal ID: ISSN 1944-8244
- Grant/Contract Number:
- 89233218CNA000001; AC02-05CH11231; NA0003525
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Materials and Interfaces
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 10; Journal ID: ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Energy Sciences; alkaline membrane electrolyzer; anion exchange ionomer; density functional theory; durability; phenyl adsorption; phenyl oxidation
Citation Formats
Li, Dongguo, Matanovic, Ivana, Lee, Albert Sung Soo, Park, Eun Joo, Fujimoto, Cy, Chung, Hoon Taek, and Kim, Yu Seung. Phenyl Oxidation Impacts the Durability of Alkaline Membrane Water Electrolyzer. United States: N. p., 2019.
Web. doi:10.1021/acsami.9b00711.
Li, Dongguo, Matanovic, Ivana, Lee, Albert Sung Soo, Park, Eun Joo, Fujimoto, Cy, Chung, Hoon Taek, & Kim, Yu Seung. Phenyl Oxidation Impacts the Durability of Alkaline Membrane Water Electrolyzer. United States. https://doi.org/10.1021/acsami.9b00711
Li, Dongguo, Matanovic, Ivana, Lee, Albert Sung Soo, Park, Eun Joo, Fujimoto, Cy, Chung, Hoon Taek, and Kim, Yu Seung. Tue .
"Phenyl Oxidation Impacts the Durability of Alkaline Membrane Water Electrolyzer". United States. https://doi.org/10.1021/acsami.9b00711. https://www.osti.gov/servlets/purl/1503198.
@article{osti_1503198,
title = {Phenyl Oxidation Impacts the Durability of Alkaline Membrane Water Electrolyzer},
author = {Li, Dongguo and Matanovic, Ivana and Lee, Albert Sung Soo and Park, Eun Joo and Fujimoto, Cy and Chung, Hoon Taek and Kim, Yu Seung},
abstractNote = {The durability of alkaline anion exchange membrane (AEM) electrolyzers is a critical requirement for implementing this technology in cost-effective hydrogen production. Here, we report that the electrochemical oxidation of the adsorbed phenyl group (found in the ionomer) on oxygen evolution catalysts produces phenol, which may cause performance deterioration in AEM electrolyzers. In-line 1H NMR kinetic analyses of phenyl oxidation in a model organic cation electrolyte shows that catalyst type significantly impacts the phenyl oxidation rate at an oxygen evolution potential. Density functional theory calculations show that the phenyl adsorption is a critical factor determining the phenyl oxidation. This research provides a path for the development of more durable AEM electrolyzers with components that can minimize the adverse impact induced by the phenyl group oxidation, such as the development of novel ionomers with fewer phenyl moieties or catalysts with less phenyl-adsorbing character.},
doi = {10.1021/acsami.9b00711},
journal = {ACS Applied Materials and Interfaces},
number = 10,
volume = 11,
place = {United States},
year = {Tue Feb 19 00:00:00 EST 2019},
month = {Tue Feb 19 00:00:00 EST 2019}
}
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