Electrochemical Oxygen Pump Assisted Solar Thermochemical CO2 Reduction

Electrochemical Oxygen Pump Assisted Solar Thermochemical CO2 Reduction | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Electrochemical Oxygen Pump Assisted Solar Thermochemical CO 2 Reduction Meng Lin, Runsen Wang, Hui Liu, Yuefan Tuo, Qi Zhang, Lei Zhao, and 10 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8191968/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Maintaining low oxygen partial pressure during ceria reduction is critical for efficient solar thermochemical fuel production, yet conventional routes rely on energy-intensive gas sweeping or vacuum pumping. We demonstrate a ceria-based reactor operated with a hybrid oxygen removal strategy; moderate sweep gas coupled with electrochemical oxygen pumping (SG + EOP), that enables in situ oxygen removal with reduced auxiliary energy. Increasing EOP’s operating potential from 0.5 to 1.0 V at moderate argon flow increased the molar oxygen production rate during reduction and led to a 15.6% increase in overall solar to fuel efficiency (from 0.307% to 0.355%). At these conditions, the EOP accounted for up to 12.1% of the total oxygen removal. Durable performance was demonstrated for over 102 redox cycles when controlled cooldown was ensured to prevent interfacial delamination. When scaling up to 500 kW, the lowest CO price was projected to be 1.19 $·kg -1 at the highest annual output (2.33 × 10 4 kg·year -1 ) for SG + EOP compared to the SG and SG + VP (vacuum pump) method, establishing this hybrid approach as a practical and scalable pathway toward efficient and solar-to-fuel systems. Physical sciences/Energy science and technology/Renewable energy/Solar energy/Solar fuels Physical sciences/Energy science and technology/Renewable energy/Solar energy/Solar thermal energy Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupportingInformationforElectrochemicalOxygenPumpAssistedSolarThermochemicalCO2Reduction.pdf Supporting Information for Electrochemical Oxygen Pump Assisted Solar Thermochemical CO2 Reduction Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8191968","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":578883987,"identity":"e66600aa-d928-4b91-b9cc-7056dcf3c9be","order_by":0,"name":"Meng 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We demonstrate a ceria-based reactor operated with a hybrid oxygen removal strategy; moderate sweep gas coupled with electrochemical oxygen pumping (SG + EOP), that enables in situ oxygen removal with reduced auxiliary energy. Increasing EOP’s operating potential from 0.5 to 1.0 V at moderate argon flow increased the molar oxygen production rate during reduction and led to a 15.6% increase in overall solar to fuel efficiency (from 0.307% to 0.355%). At these conditions, the EOP accounted for up to 12.1% of the total oxygen removal. Durable performance was demonstrated for over 102 redox cycles when controlled cooldown was ensured to prevent interfacial delamination. 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