Cation effects on the electro-oxidation of alcohols are not mediated solely by their interactions with adsorbed OH

Cation effects on the electro-oxidation of alcohols are not mediated solely by their interactions with adsorbed OH | 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 Article Cation effects on the electro-oxidation of alcohols are not mediated solely by their interactions with adsorbed OH Angel Cuesta, Alan Gibson, Tadeu Cabral, Victor Yukuhiro, Claudio Tormena, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9092202/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract In this work, we deconvolute the impact of electrolyte cations on the electro-oxidation of glycerol on Pt. UV-Vis reflectograms reveal that the presence of glycerol inverts and enhances the magnitude of cation effects on Pt oxidation. A cation-dependent glycerol diffusion coefficient was then identified using 1 H-DOSY-NMR, providing solid experimental evidence that smaller cations interact more strongly with glycerol than larger ones. The rates of partial oxidation of glycerol to adsorbed carbon monoxide (CO ad ), and of CO ad oxidation, measured as a function of cation identity using time-resolved ATR-SEIRAS, suggest that global cation-induced trends in GOR activity are driven mainly by the reaction pathways that do not involve CO ad . This implies that interactions between electrolyte cations and AOS alone cannot explain the cation-induced trends in electrocatalytic behaviour. Instead, the interactions of electrolyte cations with the reactant are critical to the cation-dependent electrocatalytic activity of alcohol and polyol oxidation. Physical sciences/Chemistry/Electrochemistry/Electrocatalysis Physical sciences/Chemistry/Catalysis/Electrocatalysis Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SIAJGTLGCVYYCFTPSFACCationeffectsGOR.docx Supporting Information, Cation effects on the electro-oxidation of alcohols are not mediated solely by their interactions with adsorbed OH Cite Share Download PDF Status: Under Review Version 1 posted 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-9092202","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":616147794,"identity":"9e394b31-a0c1-4034-8296-3eb3a8192b61","order_by":0,"name":"Angel 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UV-Vis reflectograms reveal that the presence of glycerol inverts and enhances the magnitude of cation effects on Pt oxidation. A cation-dependent glycerol diffusion coefficient was then identified using \u003csup\u003e1\u003c/sup\u003eH-DOSY-NMR, providing solid experimental evidence that smaller cations interact more strongly with glycerol than larger ones. The rates of partial oxidation of glycerol to adsorbed carbon monoxide (CO\u003csub\u003ead\u003c/sub\u003e), and of CO\u003csub\u003ead\u003c/sub\u003e oxidation, measured as a function of cation identity using time-resolved ATR-SEIRAS, suggest that global cation-induced trends in GOR activity are driven mainly by the reaction pathways that do not involve CO\u003csub\u003ead\u003c/sub\u003e. This implies that interactions between electrolyte cations and AOS alone cannot explain the cation-induced trends in electrocatalytic behaviour. 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