In-situ investigation and modeling of electrochemical reactions with simultaneous oxygen and hydrogen microbubble evolutions in water electrolysis
Abstract
The development of water electrolyzer is challenging as we approach theoretical limits arising from electrochemical reactions and micro-scale bubble dynamics. In this research, two-phase flow and bubble dynamics are in-situ studied in a special designed single-channel electrolyzer. The devices fabricated by a 3D printer provide a whole vision of the electrochemical reaction within the channel. In-situ observations of channel-scale hydrogen and oxygen micro-bubbles dynamics are conducted, and the whole process of hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs) are simultaneously studied. The results indicate that all bubbles generate at the interface between the proton exchange membrane and the electrode wire, and the operating conditions have a great impact on the micro bubble evolution process. The bubble detachment diameter is inversely proportional to the flow velocity, but is in direct proportion to the current density. Finally, a mathematic model has been developed, and shows a good agreement with experimental data. Those results could help to better understand the bubble evolution mechanism, to further understand the electrochemical reaction.
- Authors:
-
[1]
- Univ. of Tennessee, Knoxville, TN (United States). Nanodynamics and High-Efficiency Lab for Propulsion and Power, UT Space Institute
- Publication Date:
- Research Org.:
- Univ. of Tennessee, Knoxville, TN (United States); Alliance for Sustainable Energy, LLC (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1799753
- Alternate Identifier(s):
- OSTI ID: 1596894
- Grant/Contract Number:
- FE0011585; AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Hydrogen Energy
- Additional Journal Information:
- Journal Volume: 44; Journal Issue: 52; Journal ID: ISSN 0360-3199
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 08 HYDROGEN; Chemistry; Electrochemistry; Energy & Fuels; Electrochemical reaction; Oxygen; Hydrogen; Single-channel electrolyzer; Micro bubble; Detachment
Citation Formats
Li, Yifan, Yang, Gaoqiang, Yu, Shule, Kang, Zhenye, Mo, Jingke, Han, Bo, Talley, Derrick A., and Zhang, Feng-Yuan. In-situ investigation and modeling of electrochemical reactions with simultaneous oxygen and hydrogen microbubble evolutions in water electrolysis. United States: N. p., 2019.
Web. doi:10.1016/j.ijhydene.2019.09.044.
Li, Yifan, Yang, Gaoqiang, Yu, Shule, Kang, Zhenye, Mo, Jingke, Han, Bo, Talley, Derrick A., & Zhang, Feng-Yuan. In-situ investigation and modeling of electrochemical reactions with simultaneous oxygen and hydrogen microbubble evolutions in water electrolysis. United States. https://doi.org/10.1016/j.ijhydene.2019.09.044
Li, Yifan, Yang, Gaoqiang, Yu, Shule, Kang, Zhenye, Mo, Jingke, Han, Bo, Talley, Derrick A., and Zhang, Feng-Yuan. Mon .
"In-situ investigation and modeling of electrochemical reactions with simultaneous oxygen and hydrogen microbubble evolutions in water electrolysis". United States. https://doi.org/10.1016/j.ijhydene.2019.09.044. https://www.osti.gov/servlets/purl/1799753.
@article{osti_1799753,
title = {In-situ investigation and modeling of electrochemical reactions with simultaneous oxygen and hydrogen microbubble evolutions in water electrolysis},
author = {Li, Yifan and Yang, Gaoqiang and Yu, Shule and Kang, Zhenye and Mo, Jingke and Han, Bo and Talley, Derrick A. and Zhang, Feng-Yuan},
abstractNote = {The development of water electrolyzer is challenging as we approach theoretical limits arising from electrochemical reactions and micro-scale bubble dynamics. In this research, two-phase flow and bubble dynamics are in-situ studied in a special designed single-channel electrolyzer. The devices fabricated by a 3D printer provide a whole vision of the electrochemical reaction within the channel. In-situ observations of channel-scale hydrogen and oxygen micro-bubbles dynamics are conducted, and the whole process of hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs) are simultaneously studied. The results indicate that all bubbles generate at the interface between the proton exchange membrane and the electrode wire, and the operating conditions have a great impact on the micro bubble evolution process. The bubble detachment diameter is inversely proportional to the flow velocity, but is in direct proportion to the current density. Finally, a mathematic model has been developed, and shows a good agreement with experimental data. Those results could help to better understand the bubble evolution mechanism, to further understand the electrochemical reaction.},
doi = {10.1016/j.ijhydene.2019.09.044},
journal = {International Journal of Hydrogen Energy},
number = 52,
volume = 44,
place = {United States},
year = {Mon Sep 30 00:00:00 EDT 2019},
month = {Mon Sep 30 00:00:00 EDT 2019}
}
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