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Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
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Hydrogen Production by Steam Electrolysis in Solid Acid Electrolysis Cells.
Naoya Fujiwara1, Hironori Nagase1, Shohei Tada2
1Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 1138656, Japan.
Chemsuschem
|November 5, 2020
Summary
Solid acid electrolysis cells (SAECs) efficiently produce hydrogen using steam at intermediate temperatures. Optimizing anode design, like using platinum mesh, significantly improves cell stability for practical applications.
Area of Science:
- Electrochemistry
- Materials Science
- Renewable Energy
Background:
- Intermediate-temperature steam electrolysis offers high efficiency for renewable energy utilization.
- Proton-conducting solid acid electrolytes (SAEs) are promising for this process around 200°C but are under-investigated.
Purpose of the Study:
- To investigate hydrogen production via steam electrolysis using a novel solid acid electrolysis cell (SAEC).
- To identify and address key factors limiting SAEC stability at intermediate temperatures.
Main Methods:
- Steam electrolysis performed at 160-220°C using a SAEC with a CsH2PO4/SiP2O7 composite electrolyte and Pt/C electrodes.
- Investigated electrolyte migration into the anode and anode material oxidation as stability issues.
- Tested a Pt mesh anode as an alternative to Pt/C electrodes to improve stability.
Main Results:
- Successfully demonstrated hydrogen production with Faraday efficiencies around 80%.
- Identified electrolyte migration into the anode and anode carbon oxidation as critical failure mechanisms.
- The SAEC with a Pt mesh anode exhibited significantly improved operational stability.
Conclusions:
- Electrolyte migration and anode degradation compromise SAEC performance and durability.
- Anode design is crucial for developing stable and practical solid acid electrolysis cells for hydrogen production.
- This study provides essential insights into SAEC stability for future advancements.
Keywords:
Hydrogen productionIntermediate temperatureSolid acid electrolyteStabilitySteam electrolysisMore Related Videos
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