Suppressing Jahn-Teller Effect of MnO2 via Synergistically Crystalline and Electronic Structural Regulation for Efficient Ammonium Ion Capture

Suppressing Jahn-Teller Effect of MnO2 via Synergistically Crystalline and Electronic Structural Regulation for Efficient Ammonium Ion Capture | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Energy & Environmental Materials This is a preprint and has not been peer reviewed. Data may be preliminary. 7 April 2025 V1 Latest version Share on Suppressing Jahn-Teller Effect of MnO2 via Synergistically Crystalline and Electronic Structural Regulation for Efficient Ammonium Ion Capture Authors : Shuwen Du , Shiyong Wang , Yuhao Lei , Lin Zhao , Gang Wang 0000-0002-3185-1268 [email protected] , and Jieshan Qiu Authors Info & Affiliations https://doi.org/10.22541/au.174405083.33544552/v1 Published ENERGY & ENVIRONMENTAL MATERIALS Version of record Peer review timeline 332 views 185 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Layered manganese dioxide (δ-MnO2) is considered as a promising ammonium ion capture electrode material for capacitive deionization (CDI) attributed to its high theoretical capacity and cost-effectiveness. Nevertheless, it continues to encounter challenges including rapid capacity degradation, structural instability, and Jahn─Teller effect. Herein, a crystal and electron synergistically regulation engineering strategy is proposed for the suppression of Jahn─Teller effect and the improvement of ammonium ion storage dynamics in F doped MnO2 (MnOF). The induced action of F ions transforms MnO2 structure from the original cubic [MnO6] octahedron into an asymmetric [Mn(OF)6] octahedron with electron redistribution, and generates a localized charge imbalance along the O─Mn─F pathway, which promotes electron transfer from Mn to F direction, accelerates electron transfer, and reduces the energy barrier of ammonium ion diffusion. As results, the prepared MnOF exhibited a maximum salt adsorption capacity of 144.3 mg g−1 and an exceptionally high salt adsorption rate of 18.25 mg g−1 min−1, along with outstanding cycling stability. Besides, ex/in situ characterizations reveal that in MnOF, the formation /breaking of hydrogen bond is accompanied by the insertion/deinsertion of NH4+. Therefore, the rational introduction of highly electronegative anions provides a new direction for the development of advanced CDI electrode materials. Supplementary Material File (manuscript.pdf) Download 1.33 MB Information & Authors Information Version history V1 Version 1 07 April 2025 Peer review timeline Published ENERGY & ENVIRONMENTAL MATERIALS Version of Record 9 Jun 2025 Published Copyright This work is licensed under a Non Exclusive No Reuse License. Collection Energy & Environmental Materials Keywords capacitive deionization excellent ammonium removal performance f-doping jahn─teller effect mno2 Authors Affiliations Shuwen Du Dongguan University of Technology View all articles by this author Shiyong Wang Dongguan University of Technology View all articles by this author Yuhao Lei Dongguan University of Technology View all articles by this author Lin Zhao Dongguan University of Technology View all articles by this author Gang Wang 0000-0002-3185-1268 [email protected] Dongguan University of Technology View all articles by this author Jieshan Qiu Beijing University of Chemical Technology View all articles by this author Metrics & Citations Metrics Article Usage 332 views 185 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Shuwen Du, Shiyong Wang, Yuhao Lei, et al. Suppressing Jahn-Teller Effect of MnO2 via Synergistically Crystalline and Electronic Structural Regulation for Efficient Ammonium Ion Capture. Authorea . 07 April 2025. DOI: https://doi.org/10.22541/au.174405083.33544552/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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