review · Chemical Reviews
This review examines the latest advancements in solid oxide electrolyser cells (SOECs) for the coelectrolysis of carbon dioxide and water into syngas, a mixture of carbon monoxide and hydrogen. It covers the fundamental operating principles, thermodynamic and kinetic models for both oxygen-ion and proton-conducting SOECs, and summarises recently developed advanced materials. The review also explores how syngas ratios can be controlled by adjusting operating conditions such as temperature, gas composition, flow rate, voltage, current, and pressure. It highlights the sustainability and broad applications of SOEC technology for syngas conversion, concluding with a discussion of current challenges and future research directions in this field.
This research is important because it explores how to efficiently convert carbon dioxide and water into syngas using advanced technology. Syngas is a crucial building block for producing sustainable fuels and chemicals, offering a pathway to reduce carbon emissions and store renewable energy, which are key solutions for climate change.
This review highlights the potential for solid oxide electrolyser cells to produce syngas from carbon dioxide and water, which can then be converted into sustainable fuels and value-added chemicals. This technology could be applied by energy companies and chemical manufacturers seeking to reduce carbon emissions and store renewable energy. The work summarises existing research and identifies future directions, indicating it is an area of ongoing development with clear application pathways.
AI-generated from the published abstract. Always read the original work before citing.
Highly efficient coelectrolysis of CO<sub>2</sub>/H<sub>2</sub>O into syngas (a mixture of CO/H<sub>2</sub>), and subsequent syngas conversion to fuels and value-added chemicals, is one of the most promising alternatives to reach the corner of zero carbon strategy and renewable electricity storage. This research reviews the current state-of-the-art advancements in the coelectrolysis of CO<sub>2</sub>/H<sub>2</sub>O in solid oxide electrolyzer cells (SOECs) to produce the important syngas intermediate. The overviews of the latest research on the operating principles and thermodynamic and kinetic models are included for both oxygen-ion- and proton-conducting SOECs. The advanced materials that have recently been developed for both types of SOECs are summarized. It later elucidates the necessity and possibility of regulating the syngas ratios (H<sub>2</sub>:CO) via changing the operating conditions, including temperature, inlet gas composition, flow rate, applied voltage or current, and pressure. In addition, the sustainability and widespread application of SOEC technology for the conversion of syngas is highlighted. Finally, the challenges and the future research directions in this field are addressed. This review will appeal to scientists working on renewable-energy-conversion technologies, CO<sub>2</sub> utilization, and SOEC applications. The implementation of the technologies introduced in this review offers solutions to climate change and renewable-power-storage problems.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1021/acs.chemrev.3c00760
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