Ultrathin porous PtPdCu nanosheets as efficient electrocatalysts for oxygen reduction reaction

Ultrathin porous PtPdCu nanosheets as efficient electrocatalysts for oxygen reduction reaction | 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 Ultrathin porous PtPdCu nanosheets as efficient electrocatalysts for oxygen reduction reaction Yaru Li, Jianglong Cheng, Quan Wang, Hongbin Wang, Haipeng Hou, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7742422/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 10 You are reading this latest preprint version Abstract Cathode catalysts are vital for proton exchange membrane fuel cells (PEMFCs). However, the sluggish Oxygen reduction reaction (ORR) kinetics and the high cost of platinum-based catalysts collectively pose significant barriers to the large-scale commercialization of PEMFCs. To address these issues, a Pt-Pd-Cu ultrathin nanosheet was prepared with a thickness of about 1.626 nm through chemical synthesis and the substitution method. The synthesis, which involves chemical reduction of Pt precursors followed by directional deposition on the Pd-Cu layer, produces Pt 3 Pd 64 Cu 33 catalysts with a composite structure that exhibits structural stability and enhanced catalytic performance. Electrochemical tests reveal that the as-synthesized Pt 3 Pd 64 Cu 33 ultrathin nanosheets show the mass activity (MA) of 1.59 A mg -1 Pt+Pd , and the specific activity (SA) of 0.422 mA cm -2 . These performance show 4.42-fold and 1.66-fold enhancements over commercial Pt/C catalysts (MA:0.36 A mg -1 Pt+Pd , SA:0.255 mA cm -2 ), respectively. The results demonstrate that the ultrathin nanosheet-structured catalyst enhances catalytic activity, offering a strategy for the design of advanced cathode catalysts. Proton exchange membrane fuel cell (PEMFC) Oxygen reduction reaction (ORR) Ultra-thin ternary alloy nanosheets Pt-Pd-Cu catalysts Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 11 Oct, 2025 Reviews received at journal 11 Oct, 2025 Reviewers agreed at journal 04 Oct, 2025 Reviews received at journal 30 Sep, 2025 Reviewers agreed at journal 30 Sep, 2025 Reviewers agreed at journal 30 Sep, 2025 Reviewers invited by journal 30 Sep, 2025 Editor assigned by journal 30 Sep, 2025 Submission checks completed at journal 30 Sep, 2025 First submitted to journal 29 Sep, 2025 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-7742422","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":528157872,"identity":"a18f9399-f69d-4693-b769-d091ffd326fc","order_by":0,"name":"Yaru Li","email":"","orcid":"","institution":"Shanghai Dianji University","correspondingAuthor":false,"prefix":"","firstName":"Yaru","middleName":"","lastName":"Li","suffix":""},{"id":528157874,"identity":"d9df8ac7-7e48-4b33-a6f8-1db6a02caeef","order_by":1,"name":"Jianglong Cheng","email":"","orcid":"","institution":"Shanghai Dianji 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reaction","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":"Proton exchange membrane fuel cell (PEMFC), Oxygen reduction reaction (ORR), Ultra-thin ternary alloy nanosheets Pt-Pd-Cu catalysts","lastPublishedDoi":"10.21203/rs.3.rs-7742422/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7742422/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eCathode catalysts are vital for proton exchange membrane fuel cells (PEMFCs). However, the sluggish Oxygen reduction reaction (ORR) kinetics and the high cost of platinum-based catalysts collectively pose significant barriers to the large-scale commercialization of PEMFCs. To address these issues, a Pt-Pd-Cu ultrathin nanosheet was prepared with a thickness of about 1.626 nm through chemical synthesis and the substitution method. The synthesis, which involves chemical reduction of Pt precursors followed by directional deposition on the Pd-Cu layer, produces Pt\u003csub\u003e3\u003c/sub\u003ePd\u003csub\u003e64\u003c/sub\u003eCu\u003csub\u003e33\u003c/sub\u003e catalysts with a composite structure that exhibits structural stability and enhanced catalytic performance. Electrochemical tests reveal that the as-synthesized Pt\u003csub\u003e3\u003c/sub\u003ePd\u003csub\u003e64\u003c/sub\u003eCu\u003csub\u003e33\u003c/sub\u003e ultrathin nanosheets show the mass activity (MA) of 1.59 A mg\u003csup\u003e-1\u003c/sup\u003e\u003csub\u003ePt+Pd\u003c/sub\u003e, and the specific activity (SA) of 0.422 mA cm\u003csup\u003e-2\u003c/sup\u003e. These performance show 4.42-fold and 1.66-fold enhancements over commercial Pt/C catalysts (MA:0.36 A mg\u003csup\u003e-1\u003c/sup\u003e\u003csub\u003ePt+Pd\u003c/sub\u003e, SA:0.255 mA cm\u003csup\u003e-2\u003c/sup\u003e), respectively. The results demonstrate that the ultrathin nanosheet-structured catalyst enhances catalytic activity, offering a strategy for the design of advanced cathode catalysts.\u003c/p\u003e","manuscriptTitle":"Ultrathin porous PtPdCu nanosheets as efficient electrocatalysts for oxygen reduction reaction","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-10-13 18:03:39","doi":"10.21203/rs.3.rs-7742422/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2025-10-11T18:00:14+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-10-11T06:50:32+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"321892451538695155862113988373285816362","date":"2025-10-05T02:25:16+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-09-30T13:03:46+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"139930305960395731669955005250493024487","date":"2025-09-30T12:41:33+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"320661764989054093151380470765583648325","date":"2025-09-30T11:11:02+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-09-30T10:50:47+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-09-30T04:50:36+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2025-09-30T04:49:19+00:00","index":"","fulltext":""},{"type":"submitted","content":"Catalysis Letters","date":"2025-09-29T13:05:29+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":"a3706f4b-60b5-4031-8adc-ad26abdbbb74","owner":[],"postedDate":"October 13th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[],"tags":[],"updatedAt":"2025-10-23T14:38:08+00:00","versionOfRecord":[],"versionCreatedAt":"2025-10-13 18:03:39","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7742422","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7742422","identity":"rs-7742422","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}