Extracting Oxygen from Chang’e-5 Lunar Regolith Simulants
Abstract
Harvesting oxygen and metals from the local resources of the Moon is a key step to advancing outer space exploration. A large amount of oxygen is stored in the lunar regolith in the form of oxides. Many efforts have been devoted to electrochemically splitting oxides to oxygen and metals in molten oxides and molten salts. However, a cheap oxygen-evolution inert anode is still a serious challenge, especially in the supercorrosive molten halides. Herein, we combine a molten CaCl 2 electrolyzer that can convert Chang’e-5 lunar regolith simulants to metals and CO 2 using a carbon anode and a molten carbonate electrolyzer that can convert the generated CO 2 to carbon and oxygen using a cheap Ni11Fe10Cu oxygen-evolution anode. Further, the electrolytic carbon is reused as the anode in the molten CaCl 2 electrolyzer, thereby closing the carbon cycle. Hence, the overall electrochemical reaction of the dual-electrolyzer system is to convert lunar regolith to metals and oxygen. More broadly, this system can convert the CO 2 generated by humans living on the Moon and Mars to oxygen and carbon materials.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Electrolytes include molten calcium chloride, molten cryolite, molten regolith, and ionic liquid.
“Electrolytes include molten calcium chloride, 114,115 molten cryolite, 116 molten regolith, 117,118 and ionic liquid. 119,120”
From Energy system and resource utilization in space: A state-of-the-art review (2024) · cites this paper as [115]
Cites
Direct electrochemical reduction of titanium dioxide to titanium in molten calcium chloride
Chen, G. Z., Fray, D. J., & Farthing, T. W. (2000) · Nature · doi:10.1038/35030069 · Cited by 1,537 · see citing works
Application of ionic liquids to the electrodeposition of metals
Abbott, A. P., & McKenzie, K. J. (2006) · Physical Chemistry Chemical Physics · doi:10.1039/b607329h · Cited by 817 · see citing works
Characteristics of the lunar samples returned by the Chang’E-5 mission
Li, C., Hu, H., Yang, M., Pei, Z., Zhou, Q., Ren, X., Liu, B., Liu, D., Zeng, X., Zhang, G., et al. (2021) · National Science Review · doi:10.1093/nsr/nwab188 · Cited by 501 · see citing works
Pinpoint and bulk electrochemical reduction of insulating silicon dioxide to silicon
Nohira, T., Yasuda, K., & Ito, Y. (2003) · Nature Materials · doi:10.1038/nmat900 · Cited by 410 · see citing works
Yin, H., Mao, X., Tang, D., Xiao, W., Xing, L., Zhu, H., Wang, D., & Sadoway, D. R. (2013) · Energy & Environmental Science · doi:10.1039/c3ee24132g · Cited by 338 · see citing works
Self-citationNon-KREEP origin for Chang’e-5 basalts in the Procellarum KREEP Terrane
Tian, H., Wang, H., Chen, Y. G., Yang, W., Zhou, Q., Zhang, C., Lin, H., Huang, C., Wu, S., Jia, L., et al. (2021) · Nature · doi:10.1038/s41586-021-04119-5 · Cited by 309 · see citing works
A new anode material for oxygen evolution in molten oxide electrolysis
Allanore, A., Yin, L., & Sadoway, D. R. (2013) · Nature · doi:10.1038/nature12134 · Cited by 268 · see citing works
The electrochemical reduction processes of solid compounds in high temperature molten salts
Xiao, W., & Wang, D. (2014) · Chemical Society Reviews · doi:10.1039/c3cs60327j · Cited by 257 · see citing works
Self-citationThe production of oxygen and metal from lunar regolith
Schwandt, C., Hamilton, J. A., Fray, D. J., & Crawford, I. A. (2012) · Planetary and Space Science · doi:10.1016/j.pss.2012.06.011 · Cited by 186 · see citing works
Inert anodes for the Hall-Héroult cell: The ultimate materials challenge
Sadoway, D. R. (2001) · JOM · doi:10.1007/s11837-001-0206-5 · Cited by 180 · see citing works
Lomax, B. A., Conti, M., Khan, N., Bennett, N. S., Ganin, A. Y., & Symes, M. D. (2020) · Planetary and Space Science · doi:10.1016/j.pss.2019.104748 · Cited by 161 · see citing works
Production of Oxygen Gas and Liquid Metal by Electrochemical Decomposition of Molten Iron Oxide
Wang, D., Gmitter, A. J., & Sadoway, D. R. (2011) · Journal of The Electrochemical Society · doi:10.1149/1.3560477 · Cited by 140 · see citing works
Self-citationLicht, S. L. (2011) · Advanced Materials · doi:10.1002/adma.201103198 · Cited by 134 · see citing works
Yasuda, K., Nohira, T., Hagiwara, R., & Ogata, Y. H. (2007) · Electrochimica Acta · doi:10.1016/j.electacta.2007.01.024 · Cited by 125 · see citing works
Electrolysis of Molten Iron Oxide with an Iridium Anode: The Role of Electrolyte Basicity
Kim, H., Paramore, J. D., Allanore, A., & Sadoway, D. R. (2011) · Journal of The Electrochemical Society · doi:10.1149/1.3623446 · Cited by 120 · see citing works
Development of an Inert Anode for Electrowinning in Calcium Chloride–Calcium Oxide Melts
Jiao, S., & Fray, D. J. (2009) · Metallurgical and Materials Transactions B · doi:10.1007/s11663-009-9281-8 · Cited by 114 · see citing works
Silicon Electrochemistry in Molten Salts
Juzeliūnas, E., & Fray, D. J. (2019) · Chemical Reviews · doi:10.1021/acs.chemrev.9b00428 · Cited by 110 · see citing works
Allanore, A., Lavelaine, H., Valentin, G., Birat, J., Delcroix, P., & Lapicque, F. (2010) · Electrochimica Acta · doi:10.1016/j.electacta.2010.02.040 · Cited by 88 · see citing works
Jiang, R., Gao, M., Mao, X., & Wang, D. (2019) · Current Opinion in Electrochemistry · doi:10.1016/j.coelec.2019.04.011 · Cited by 85 · see citing works
Self-citationJiang, Y. Y., Li, Y., Liao, S., Yin, Z., & Hsu, W. (2021) · 中国科学通报:英文版 · doi:10.1016/j.scib.2021.12.006 · Cited by 77 · see citing works
Kilby, K. T., Jiao, S., & Fray, D. J. (2010) · Electrochimica Acta · doi:10.1016/j.electacta.2010.06.049 · Cited by 75 · see citing works
Yang, W., & Lin, Y. (2020) · The Innovation · doi:10.1016/j.xinn.2020.100070 · Cited by 55 · see citing works
Mineral Processing and Metal Extraction on the Lunar Surface - Challenges and Opportunities
Shaw, M., Humbert, M. S., Brooks, G., Rhamdhani, M. A., Duffy, A. R., & Pownceby, M. I. (2021) · Mineral Processing and Extractive Metallurgy Review · doi:10.1080/08827508.2021.1969390 · Cited by 55 · see citing works
Sanders, G. B., & Larson, W. E. (2012) · Earth and Space 2012 · doi:10.1061/9780784412190.050 · Cited by 48 · see citing works
Lunar Soil Simulant Electrolysis Using Inert Anode for Al-Si Alloy and Oxygen Production
Liu, A., Shi, Z., Hu, X., Gao, B., & Wang, Z. (2017) · Journal of The Electrochemical Society · doi:10.1149/2.1381702jes · Cited by 45 · see citing works
The reduction of lunar regolith by carbothermal processing using methane
Balasubramaniam, R., Gökoğlu, S. A., & Hegde, U. (2010) · International Journal of Mineral Processing · doi:10.1016/j.minpro.2010.06.001 · Cited by 38 · see citing works
Xie, K., Shi, Z., Xu, J., Hu, X., Gao, B., & Wang, Z. (2017) · JOM · doi:10.1007/s11837-017-2478-4 · Cited by 36 · see citing works
Durability of platinum coating anode in molten carbonate electrolysis cell
Du, K., Yu, R., Gao, M., Chen, Z., Mao, X., Zhu, H., & Wang, D. (2019) · Corrosion Science · doi:10.1016/j.corsci.2019.03.028 · Cited by 36 · see citing works
Self-citationUnusual temperature effect on the stability of nickel anodes in molten carbonates
Du, K., Zheng, K., Chen, Z., Zhu, H., Gan, F., & Wang, D. (2017) · Electrochimica Acta · doi:10.1016/j.electacta.2017.05.149 · Cited by 35 · see citing works
Self-citationThermodynamic modelling of ultra-high vacuum thermal decomposition for lunar resource processing
Shaw, M., Brooks, G. A., Rhamdhani, M. A., Duffy, A. R., & Pownceby, M. I. (2021) · Planetary and Space Science · doi:10.1016/j.pss.2021.105272 · Cited by 34 · see citing works
Nickel-Iron-Copper Alloy as Inert Anode for Ternary Molten Carbonate Electrolysis at 650°C
Zheng, K., Du, K., Cheng, X., Jiang, R., Deng, B., Zhu, H., & Wang, D. (2018) · Journal of The Electrochemical Society · doi:10.1149/2.1211811jes · Cited by 33 · see citing works
Self-citationSargeant, H., Abernethy, F. A. J., Anand, M., Barber, S. J., Landsberg, P. T., Sheridan, S., Wright, I. P., & Morse, A. D. (2019) · Planetary and Space Science · doi:10.1016/j.pss.2019.104759 · Cited by 30 · see citing works
Xie, H., Zhao, H., Qu, J., Song, Q., Ning, Z., & Yin, H. (2019) · Journal of Solid State Electrochemistry · doi:10.1007/s10008-019-04193-w · Cited by 29 · see citing works
Self-citationSynthesis of Nanostructured Carbon Material by Electroreduction in Fused Alkali Carbonates
Kaplan, B., Groult, H., Komaba, S., Kumagai, N., & Lantelme, F. (2001) · Chemistry Letters · doi:10.1246/cl.2001.714 · Cited by 21 · see citing works
Frangini, S., Paoletti, C., & Seta, L. D. (2020) · International Journal of Hydrogen Energy · doi:10.1016/j.ijhydene.2020.06.028 · Cited by 21 · see citing works
Samouhos, M., Tsakiridis, P., Iskander, M., Taxiarchou, M., & Betsis, K. (2022) · Planetary and Space Science · doi:10.1016/j.pss.2021.105414 · Cited by 21 · see citing works
Getty, S., ten Kate, I. L., Feng, S., Brinckerhoff, W. B., Cardiff, E. H., Holmes, V., King, T. T., Li, M. J., Mumm, E., Mahaffy, P. R., et al. (2010) · International Journal of Mass Spectrometry · doi:10.1016/j.ijms.2010.06.020 · Cited by 20 · see citing works
China's lunar and deep space exploration: touching the moon and exploring the universe
Zhao, W., & Wang, C. (2019) · National Science Review · doi:10.1093/nsr/nwz120 · Cited by 20 · see citing works
Corrosion behaviour and mechanism of nickel anode in SO42- containing molten Li2CO3-Na2CO3-K2CO3
Wang, P., Du, K., Dou, Y., Zhu, H., & Wang, D. (2020) · Corrosion Science · doi:10.1016/j.corsci.2020.108450 · Cited by 20 · see citing works
Self-citationXie, H., Zhao, H., Song, Q., Ning, Z., Qu, J., & Yin, H. (2018) · Journal of The Electrochemical Society · doi:10.1149/2.0251814jes · Cited by 17 · see citing works
Self-citationCarbon Reduction of Lunar Regolith for Oxygen Production
Gustafson, R. J. (2005) · AIP conference proceedings · doi:10.1063/1.1867249 · Cited by 16 · see citing works
Electrolysis of iron with oxygen gas evolution from molten sodium borate electrolytes
Choi, H.-G., Choi, S., Kim, M., Jang, J., Nam, K. T., Jung, I., & Yi, K. (2021) · Ironmaking & Steelmaking Processes Products and Applications · doi:10.1080/03019233.2020.1861837 · Cited by 12 · see citing works
Dissolution and electrolysis of lunar regolith in ionic liquids
Rohde, S., Wiltsche, H., Cowley, A., & Gollas, B. R. (2022) · Planetary and Space Science · doi:10.1016/j.pss.2022.105534 · Cited by 8 · see citing works
Plasma Processing of Lunar Regolith Simulant for Oxygen and Glass Production
Sen, S., Butts, D., O'Dell, J. S., & Ray, C. S. (2010) · ASCE International Conference on Engineering, Science, Construction, and Operations in Challenging Environments (Earth and Space) · doi:10.1061/41096(366)121 · Cited by 4 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
Energy system and resource utilization in space: A state-of-the-art review
Wu, W., Shen, J., Kong, H., Yang, Y., Ren, E., Liu, Z., Wang, W., Dong, M., Han, L., Yang, C., et al. (2024) · The Innovation Energy · doi:10.59717/j.xinn-energy.2024.100029 · Cited by 44 · see citing works
Influence of ambient pressure on laser beam melting of lunar regolith simulant
Griemsmann, T., Patzwald, J., Chawda, C., Eismann, T., Abel, A., Emminghaus, N., Hermsdorf, J., Stoll, E., & Overmeyer, L. (2024) · Acta Astronautica · doi:10.1016/j.actaastro.2024.11.057 · Cited by 18 · see citing works
Overview of in-situ oxygen production technologies for lunar resources
Xu, Y., Pang, S., Cong, L., Qian, G., Wang, D., Li, L., Wu, Y., & Wang, Z. (2024) · International Journal of Minerals Metallurgy and Materials · doi:10.1007/s12613-024-2925-5 · Cited by 15 · see citing works
Self-citationIn-situ oxygen extraction from TiO2 using laser thermal vacuum metallurgy
Zhao, P., Li, G., Chen, X., Cheng, P., Yan, Y., Pang, Z., Sun, C., Yu, X., Zou, X., & Lu, X. (2023) · Vacuum · doi:10.1016/j.vacuum.2023.112628 · Cited by 13 · see citing works
Critical Electrochemistry Technologies Applicable in Space Exploration
Xu, R., Lv, Z., Li, S., He, J., & Song, J. (2025) · Advanced Science · doi:10.1002/advs.202504447 · Cited by 11 · see citing works
Lunar simulant behaviour in molten fluoride salt for ISRU applications
Maes, M., Gibilaro, M., Chamelot, P., Chiron, C., Chevrel, S., Pinet, P., Massot, L., & Favier, J. J. (2024) · Planetary and Space Science · doi:10.1016/j.pss.2024.105854 · Cited by 8 · see citing works
Transport of Volatiles in Agglutinates from Lunar Regolith of Chang’e-5 Mission
Li, L., Zhang, G. C., Zhang, H., Xiao, Y., Zhao, S., Song, J., Yao, W., Wang, W. H., Zou, Z., & Yang, M. (2025) · Research · doi:10.34133/research.0638 · Cited by 7 · see citing works
Zanotti, G., Troisi, I., Dottori, A., & Lavagna, M. R. (2024) · Aerospace · doi:10.3390/aerospace11040295 · Cited by 5 · see citing works
Jing, Z., Liu, A., Wang, Y., Zhang, Y., Liu, F., He, C., Hu, X., Wang, J., He, Z., & Shi, Z. (2025) · Separation and Purification Technology · doi:10.1016/j.seppur.2025.136676 · Cited by 3 · see citing works
Vacuum laser zone refining of titanium towards lunar metallurgy: Experimental and numerical study
Zhao, P., Li, G., Cheng, P., Gao, Y., Sun, C., Yu, X., Pang, Z., Zou, X., & Lu, X. (2024) · Vacuum · doi:10.1016/j.vacuum.2024.113733 · Cited by 3 · see citing works
Wu, Y., Wang, H., Xiang, M., Hu, Z., Shi, H., Pang, F., Wang, B., Zhang, X., Wang, D., Liu, X., et al. (2025) · Metallurgical and Materials Transactions B · doi:10.1007/s11663-025-03596-7 · Cited by 3 · see citing works
Self-citationElectrochemical Processing of Planetary Regolith in Molten Salts – A Review
Guerrero-Gonzalez, F. J., Rützler, A., Donten, M. L., Lomax, B. A., Lindner, R. C., & Reiss, P. (2026) · Journal of The Electrochemical Society · doi:10.1149/1945-7111/ae5420 · Cited by 3 · see citing works
Monitoring O2– Behavior during Electrolysis in Molten CaCl2
Lin, C., & Yang, X. X. (2025) · Analytical Chemistry · doi:10.1021/acs.analchem.5c00397 · Cited by 2 · see citing works
Li, Y., Yuan, Z., Mazhar, S., Meng, Z., Zhang, Y., Ping, J., & Nunziata, F. (2025) · IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing · doi:10.1109/jstars.2025.3525797 · Cited by 1 · see citing works
Development of a New Lunar Regolith Simulant using an Automated Program Framework
Kwon, G., Kim, K. J., & Yi, E. S. (2024) · Journal of Astronomy and Space Sciences · doi:10.5140/jass.2024.41.2.79 · Cited by 1 · see citing works
Fray-Farthing-Chen Cambridge Process: From Serendipity to Space Exploration
Chen, G. Z., & Fray, D. J. (2025) · Elsevier eBooks · doi:10.1016/b978-0-443-40294-4.00050-5
Yin, P., Yao, X., Zheng, S., He, C., Wang, Y., WANG, J., & Shen, J. (2026) · International Journal of Heat and Mass Transfer · doi:10.1016/j.ijheatmasstransfer.2026.128473
Zhou, Y., Li, J., Xie, K., Liu, A., Li, Z., Hu, X., & Shi, Z. (2026) · Electrochimica Acta · doi:10.1016/j.electacta.2026.148680
Liu, D., Li, L., Wang, P., Lin, L., Tang, J., Rafique, M., Dong, S., Shuai, Y., & (86769), B. W. (2026) · Acta Astronautica · doi:10.1016/j.actaastro.2026.05.063
Self-citationAluminothermic reduction of NEU-1 lunar soil simulant in cryolite molten salt
Xiao, K., Liu, A., Qu, L., Liu, Y. Q., Zhang, Y., Li, Z., Hu, X., & Shi, Z. (2026) · Physica Scripta · doi:10.1088/1402-4896/ae7769
Reductant-free synthesis of metallic iron powder from magnetite by laser processing under vacuum
Zhang, X., Li, G., Li, C., Cheng, P., Pang, Z., Zou, X., Xu, Q., & Lu, X. (2026) · Advanced Powder Technology · doi:10.1016/j.apt.2026.105358
Zhang, G. C., Liu, X., Liu, Y., He, Y., Wang, H., Tian, Z., Yu, S., Zheng, Q., Liu, G., & Zhang, P. (2026) · Planetary and Space Science · doi:10.1016/j.pss.2026.106306
Reductant-Free Laser-Vacuum Ironmaking Technology for Lunar In-Situ Resource Utilization
Zhang, X., Li, G., Li, W., Cheng, P., Hu, Y., Pang, Z., Zou, X., Xu, Q., & Lu, X. (2026) · ACS Sustainable Chemistry & Engineering · doi:10.1021/acssuschemeng.6c04270
- Authors
- Shi, H., Li, P., Yang, Z., Zheng, K., Du, K., Guo, L., Yu, R., Wang, P., Yin, H., & Wang, D.
- Affiliations
- Wuhan University (CN)
- Corresponding author
- Yin, Huayi
- Wang, Dihua
- Venue
- ACS Sustainable Chemistry & Engineering
- Publisher
- American Chemical Society (ACS)
- Published
- 2022-10-06
- Volume
- 10
- Issue
- 41
- Pages
- 13661-13668
- ISSN
- 2168-0485 (ISSN-L)
- OpenAlex
- W4302424971
- Cited by
- 24
- References
- 44
- Citations by year
- 2026: 8 · 2025: 7 · 2024: 8 · 2023: 1
- FWCI
- 1.58
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- ACS Sustainable Chemistry & Engineering (publishedVersion)
- Funders
- National Natural Science Foundation of China (21673162, 51874211, 52031008)
- Topics
- Physical Sciences › Chemical Engineering › Fluid Flow and Transfer Processes › Molten salt chemistry and electrochemical processes
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Keywords
- lunar regolith simulant, oxygen extraction, in-situ resource utilization, carbon anodes, CO2 conversion
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review