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Electrolysis

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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...

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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...

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Related Experiment Video

Updated: Jun 16, 2025

Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

Published on: May 26, 2019

High Temperature Solid Oxide Electrolysis for Green Hydrogen Production.

Hua Liu¹, Miao Yu¹, Xiaofeng Tong²

¹Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.

Chemical Reviews

|August 21, 2024

Summary

This summary is machine-generated.

Solid Oxide Electrolysis Cells (SOECs) offer efficient green hydrogen production. Continued innovation in materials and systems is key to overcoming cost and durability challenges for widespread adoption.

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Area of Science:

Materials Science
Electrochemistry
Energy Engineering

Background:

Global warming and energy crises necessitate renewable energy solutions.
Green hydrogen is a key energy carrier for future energy systems.
Solid Oxide Electrolysis Cells (SOECs) are a promising technology for green hydrogen production due to high efficiency and reversible operation.

Purpose of the Study:

To provide a comprehensive review of the latest advancements in SOEC technology.
To discuss progress from cell to system level, including materials, fabrication, and characterization.
To analyze performance, degradation mechanisms, and mitigation strategies for SOECs.

Main Methods:

Review of recent scientific literature on SOEC technology.
Analysis of cell, stack, and system-level developments.
Discussion of material science, fabrication techniques, and characterization methods.
Evaluation of electrochemical and durable performance, degradation, and mitigation strategies.
Outline of SOEC system integration with renewable energy sources.

Main Results:

SOECs demonstrate high electrical efficiency and do not require noble metal catalysts.
Advancements in cell/stack components, configurations, electrode materials, and fabrication methods have been reported.
Degradation mechanisms and mitigation strategies are crucial for improving SOEC durability.
SOEC systems show flexibility, robustness, scalability, and energy efficiency when integrated with renewable energy.

Conclusions:

SOEC technology is vital for a future green hydrogen society with net-zero emissions.
Overcoming cost and durability challenges through innovation is essential for SOEC commercialization.
Further research and development in materials, fabrication, integration, and operation are encouraged.