Enhanced hydrogen evolution and antibacterial activity through Ag@CNT nanocomposite structure

Enhanced hydrogen evolution and antibacterial activity through Ag@CNT nanocomposite structure | 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 Research Article Enhanced hydrogen evolution and antibacterial activity through Ag@CNT nanocomposite structure Yasemin TORLAK This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8575660/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 21 You are reading this latest preprint version Abstract Green hydrogen plays an essential role across the entire hydrogen value chain, including its generation, distribution, storage, and end-use. Producing green hydrogen through sodium borohydride (NaBH₄) methanolysis is typically expensive. Nevertheless, when catalyzed, this method exhibits rapid reaction kinetics, which can offset the high production costs particularly in localized or intermittent applications. Among various catalysts, silver stands out due to its superior catalytic efficiency. Its strong activity significantly enhances the hydrogen production performance from sodium borohydride methanolysis (SBM). Comprehensive characterization of Ag, CNT, and Ag@CNT was carried out using techniques such as UV–Vis, XRD, FT-IR, SEM-EDX, and TEM to examine their structure and morphology. The catalytic efficiency of Ag@CNT in NaBH₄ methanolysis was investigated, showing a low energy barrier of 15.336 kJ/mol. Thermodynamic parameters derived from the reaction included an enthalpy change (ΔH) of 12.779 kJ/mol and an entropy change (ΔS) of -92.518 J/mol·K. In addition to catalytic assessments, antibacterial activity tests were conducted against both gram-negative and gram-positive bacteria, addressing potential microbial concerns during hydrogen storage and delivery. The findings support the Ag@CNT catalyst’s dual potential in sustainable energy production and environmental applications. hydrogen energy antibacterial efficacy nanocomposite metanolysis Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 08 Feb, 2026 Reviews received at journal 01 Feb, 2026 Reviews received at journal 27 Jan, 2026 Reviews received at journal 27 Jan, 2026 Reviews received at journal 26 Jan, 2026 Reviewers agreed at journal 21 Jan, 2026 Reviewers agreed at journal 20 Jan, 2026 Reviewers agreed at journal 19 Jan, 2026 Reviewers agreed at journal 19 Jan, 2026 Reviews received at journal 18 Jan, 2026 Reviewers agreed at journal 18 Jan, 2026 Reviewers agreed at journal 18 Jan, 2026 Reviewers agreed at journal 18 Jan, 2026 Reviews received at journal 15 Jan, 2026 Reviewers agreed at journal 14 Jan, 2026 Reviewers agreed at journal 14 Jan, 2026 Reviewers agreed at journal 14 Jan, 2026 Reviewers invited by journal 14 Jan, 2026 Editor assigned by journal 14 Jan, 2026 Submission checks completed at journal 14 Jan, 2026 First submitted to journal 11 Jan, 2026 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. 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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-8575660","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":574950926,"identity":"c9e234ee-e9d3-48f6-9815-1dce33275482","order_by":0,"name":"Yasemin 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structure","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"ionics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":" Learn more about [Ionics](https://www.springer.com/journal/11581) ","snPcode":"11581","submissionUrl":"https://mc.manuscriptcentral.com/ionics","title":"Ionics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"hydrogen energy, antibacterial efficacy, nanocomposite, metanolysis","lastPublishedDoi":"10.21203/rs.3.rs-8575660/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8575660/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eGreen hydrogen plays an essential role across the entire hydrogen value chain, including its generation, distribution, storage, and end-use. Producing green hydrogen through sodium borohydride (NaBH₄) methanolysis is typically expensive. Nevertheless, when catalyzed, this method exhibits rapid reaction kinetics, which can offset the high production costs particularly in localized or intermittent applications. Among various catalysts, silver stands out due to its superior catalytic efficiency. Its strong activity significantly enhances the hydrogen production performance from sodium borohydride methanolysis (SBM). Comprehensive characterization of Ag, CNT, and Ag@CNT was carried out using techniques such as UV\u0026ndash;Vis, XRD, FT-IR, SEM-EDX, and TEM to examine their structure and morphology. The catalytic efficiency of Ag@CNT in NaBH₄ methanolysis was investigated, showing a low energy barrier of 15.336 kJ/mol. Thermodynamic parameters derived from the reaction included an enthalpy change (ΔH) of 12.779 kJ/mol and an entropy change (ΔS) of -92.518 J/mol\u0026middot;K. In addition to catalytic assessments, antibacterial activity tests were conducted against both gram-negative and gram-positive bacteria, addressing potential microbial concerns during hydrogen storage and delivery. 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