Bimetallic CoMoS₄ Decorated MOF-Derived CdS: A Synergistic Heterostructure for Enhanced Photocatalytic Hydrogen Evolution

Bimetallic CoMoS₄ Decorated MOF-Derived CdS: A Synergistic Heterostructure for Enhanced Photocatalytic Hydrogen Evolution | 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 Bimetallic CoMoS₄ Decorated MOF-Derived CdS: A Synergistic Heterostructure for Enhanced Photocatalytic Hydrogen Evolution Irem Firtina-Ertis This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8647075/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 9 You are reading this latest preprint version Abstract This study developed a novel CdS-based photocatalyst by employing a Cd-MOF precursor and integrating CoMoS 4 as a transition bimetallic cocatalyst by two-step hydrothermal method. CdS was initially obtained by converting Cd-MOF through a sulfidation process, followed by the controlled incorporation of CoMoS 4 at varying molar ratios (2.5%, 5%, and 10%). Structural and morphological analyses (SEM-EDS, XRD, FTIR) confirmed the transformation of Cd-MOF to crystalline CdS and the successful formation of CoMoS 4 /CdS heterojunctions. The incorporation of 2.5 mol% CoMoS 4 significantly increased the BET surface area. UV–vis diffuse reflectance spectroscopy revealed a red-shifted absorption edge and a narrowed band gap of 2.26 eV for the 2.5% CoMoS 4 /CdS composite. Photoluminescence (PL) quenching and XPS analysis indicated improved charge separation and strong interfacial bonding. Mott–Schottky (M-S) measurements revealed conduction band potentials for CdS and CoMoS 4 , supporting the proposed heterojunction mechanism. Among the synthesized composites, the 2.5 mol% CoMoS 4 /CdS catalyst exhibited the highest photocatalytic hydrogen production rate of 5.8 mmol·g⁻¹·h⁻¹ under visible light, representing a tenfold increase compared to bare CdS (0.52 mmol·g⁻¹·h⁻¹). These findings demonstrate that CoMoS 4 is an effective cocatalyst for enhancing hydrogen generation through improved light harvesting and charge-carrier separation, offering a promising strategy for solar-to-hydrogen energy conversion. MOF-derived CdS transition bimetal sulfide cocatalyst photocatalytic H2 evolution Full Text Additional Declarations No competing interests reported. Supplementary Files SI1002.docx Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 13 Mar, 2026 Reviews received at journal 02 Mar, 2026 Reviews received at journal 22 Feb, 2026 Reviewers agreed at journal 10 Feb, 2026 Reviewers agreed at journal 28 Jan, 2026 Reviewers invited by journal 28 Jan, 2026 Editor assigned by journal 21 Jan, 2026 Submission checks completed at journal 21 Jan, 2026 First submitted to journal 20 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. 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-8647075","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":582167702,"identity":"42f5482d-3395-4c2d-90a9-4a1a99ead2d9","order_by":0,"name":"Irem Firtina-Ertis","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA4UlEQVRIiWNgGAWjYBACNijNw8DeAGYwNhCpxYCHgecAWDWQYCbKMgMGBokEIrXwSR8+uuHjnj8y8jOfX3/Mw2Aju+EA/7EPeB3Gl5Z2c8YzAx6D2zmFzTwMacYbDjAzz8CrhYfH7DbPAaAW6ZxEoJbDiSAteB3GxsP/7fYfoBb5mWdAWv4To4WH7TYDUAvDDfaDQC0HiNHCZnaz54Axj8GZHMaZcwySjWceZjbGq0W+h/nZjR8H5Ozl248/+PCmwk6273jjY7xakACPATh+iIxJMGB/QLzaUTAKRsEoGFEAAEnyRSZq1MhFAAAAAElFTkSuQmCC","orcid":"","institution":"Gebze Technical University","correspondingAuthor":true,"prefix":"","firstName":"Irem","middleName":"","lastName":"Firtina-Ertis","suffix":""}],"badges":[],"createdAt":"2026-01-20 09:07:25","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8647075/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8647075/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":101751797,"identity":"7ee85083-72cf-4a6d-81ea-020bb8e92057","added_by":"auto","created_at":"2026-02-03 10:23:34","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1455468,"visible":true,"origin":"","legend":"","description":"","filename":"ManuscriptCoMoS4CdSCL.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8647075/v1_covered_39c0582a-fb89-44b8-88f2-45d7355c4010.pdf"},{"id":101519175,"identity":"fc0c5d42-d242-4975-9c6d-1c13b1b67c04","added_by":"auto","created_at":"2026-01-30 16:41:01","extension":"docx","order_by":0,"title":"","display":"","copyAsset":false,"role":"supplement","size":107620,"visible":true,"origin":"","legend":"","description":"","filename":"SI1002.docx","url":"https://assets-eu.researchsquare.com/files/rs-8647075/v1/b2a39c18d8e39f3d50ad45ea.docx"}],"financialInterests":"No competing interests reported.","formattedTitle":"Bimetallic CoMoS₄ Decorated MOF-Derived CdS: A Synergistic Heterostructure for Enhanced Photocatalytic Hydrogen Evolution","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":"catalysis-letters","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"Learn more about [Catalysis Letters](https://link.springer.com/journal/10562)","snPcode":"10562","submissionUrl":"https://submission.springernature.com/new-submission/10562/3","title":"Catalysis Letters","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"MOF-derived CdS, transition bimetal sulfide cocatalyst, photocatalytic H2 evolution","lastPublishedDoi":"10.21203/rs.3.rs-8647075/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8647075/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis study developed a novel CdS-based photocatalyst by employing a Cd-MOF precursor and integrating CoMoS\u003csub\u003e4\u003c/sub\u003e as a transition bimetallic cocatalyst by two-step hydrothermal method. CdS was initially obtained by converting Cd-MOF through a sulfidation process, followed by the controlled incorporation of CoMoS\u003csub\u003e4\u003c/sub\u003e at varying molar ratios (2.5%, 5%, and 10%). Structural and morphological analyses (SEM-EDS, XRD, FTIR) confirmed the transformation of Cd-MOF to crystalline CdS and the successful formation of CoMoS\u003csub\u003e4\u003c/sub\u003e/CdS heterojunctions. The incorporation of 2.5 mol% CoMoS\u003csub\u003e4\u003c/sub\u003e significantly increased the BET surface area. UV\u0026ndash;vis diffuse reflectance spectroscopy revealed a red-shifted absorption edge and a narrowed band gap of 2.26 eV for the 2.5% CoMoS\u003csub\u003e4\u003c/sub\u003e/CdS composite. Photoluminescence (PL) quenching and XPS analysis indicated improved charge separation and strong interfacial bonding. Mott\u0026ndash;Schottky (M-S) measurements revealed conduction band potentials for CdS and CoMoS\u003csub\u003e4\u003c/sub\u003e, supporting the proposed heterojunction mechanism. Among the synthesized composites, the 2.5 mol% CoMoS\u003csub\u003e4\u003c/sub\u003e/CdS catalyst exhibited the highest photocatalytic hydrogen production rate of 5.8 mmol\u0026middot;g⁻\u0026sup1;\u0026middot;h⁻\u0026sup1; under visible light, representing a tenfold increase compared to bare CdS (0.52 mmol\u0026middot;g⁻\u0026sup1;\u0026middot;h⁻\u0026sup1;). These findings demonstrate that CoMoS\u003csub\u003e4\u003c/sub\u003e is an effective cocatalyst for enhancing hydrogen generation through improved light harvesting and charge-carrier separation, offering a promising strategy for solar-to-hydrogen energy conversion.\u003c/p\u003e","manuscriptTitle":"Bimetallic CoMoS₄ Decorated MOF-Derived CdS: A Synergistic Heterostructure for Enhanced Photocatalytic Hydrogen Evolution","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-01-30 16:40:56","doi":"10.21203/rs.3.rs-8647075/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2026-03-13T09:13:37+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-03-02T08:32:31+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-02-22T12:14:14+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"260674177992408743183244856021054073387","date":"2026-02-10T16:36:22+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"31583442878354717770207469123770029394","date":"2026-01-29T04:48:43+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2026-01-28T11:25:08+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2026-01-22T02:07:27+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2026-01-22T02:06:35+00:00","index":"","fulltext":""},{"type":"submitted","content":"Catalysis Letters","date":"2026-01-20T08:34:19+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"catalysis-letters","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"Learn more about [Catalysis Letters](https://link.springer.com/journal/10562)","snPcode":"10562","submissionUrl":"https://submission.springernature.com/new-submission/10562/3","title":"Catalysis Letters","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"3508028e-577c-49c3-bd7d-20442cc5245e","owner":[],"postedDate":"January 30th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[],"tags":[],"updatedAt":"2026-03-31T15:24:52+00:00","versionOfRecord":[],"versionCreatedAt":"2026-01-30 16:40:56","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8647075","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8647075","identity":"rs-8647075","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}