{"id":285,"date":"2024-04-17T12:00:00","date_gmt":"2024-04-17T16:00:00","guid":{"rendered":"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/?p=285"},"modified":"2024-05-02T10:53:19","modified_gmt":"2024-05-02T14:53:19","slug":"jiang-et-al-2024","status":"publish","type":"post","link":"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/jiang-et-al-2024\/","title":{"rendered":"Breaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production"},"content":{"rendered":"\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69d1dc306094b&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69d1dc306094b\" class=\"aligncenter size-full is-resized wp-lightbox-container\"><img decoding=\"async\" width=\"677\" height=\"558\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_am3c18160_0013.jpeg\" alt=\"Graphs displaying chemical conversion versus reaction temperature, alongside molecular models and a chemical equation for the reaction of glycol to co2 and h2, highlighting different catalyst compositions.\" class=\"wp-image-290 lazyload\" style=\"--smush-placeholder-width: 677px; --smush-placeholder-aspect-ratio: 677\/558;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_am3c18160_0013.jpeg 677w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_am3c18160_0013-300x247.jpeg 300w\" data-sizes=\"(max-width: 677px) 100vw, 677px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>We have synthesized Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO, also termed 0.01 wt %Pt\/ZnO-O<sub>2<\/sub>\u2013H<sub>2<\/sub>, as a catalyst containing singly dispersed single-atom bimetallic sites, also called a catalyst of singly dispersed bimetallic sites or a catalyst of isolated single-atom bimetallic sites. Its catalytic activity in partial oxidation of methanol to hydrogen at 290 \u00b0C is found to be 2\u20133 orders of magnitude higher than that of Pt\u2013Zn bimetallic nanoparticles supported on ZnO, 5.0 wt %Pt\/ZnO-N<sub>2<\/sub>\u2013H<sub>2<\/sub>. Selectivity for H<sub>2<\/sub>&nbsp;on Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO reaches 96%\u2013100% at 290\u2013330 \u00b0C, arising from the uniform coordination environment of single-atom Pt<sub>1<\/sub>&nbsp;in singly dispersed single-atom bimetallic sites, Pt<sub>1<\/sub>Zn<sub>3<\/sub>&nbsp;on 0.01 wt %Pt\/ZnO-O<sub>2<\/sub>\u2013H<sub>2<\/sub>, which is sharply different from various coordination environments of Pt atoms in coexisting Pt<sub><em>x<\/em><\/sub>Zn<sub><em>y<\/em><\/sub>&nbsp;(<em>x<\/em>&nbsp;\u2265 0,&nbsp;<em>y<\/em>&nbsp;\u2265 0) sites on Pt\u2013Zn bimetallic nanoparticles. Computational simulations attribute the extraordinary catalytic performance of Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO to the stronger adsorption of methanol and the lower activation barriers in O\u2013H dissociation of CH<sub>3<\/sub>OH, C\u2013H dissociations of CH<sub>2<\/sub>O to CO, and coupling of intermediate CO with atomic oxygen to form CO<sub>2<\/sub>&nbsp;on Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO as compared to those on Pt\u2013Zn bimetallic nanoparticles. It demonstrates that anchoring uniform,&nbsp;<em>isolated single-atom bimetallic sites<\/em>, also called&nbsp;<em>singly dispersed bimetallic sites<\/em>&nbsp;on a nonmetallic support can create new catalysts for certain types of reactions with much higher activity and selectivity in contrast to bimetallic nanoparticle catalysts with coexisting, various metallic sites M<sub><em>x<\/em><\/sub>A<sub><em>y<\/em><\/sub>&nbsp;(<em>x<\/em>&nbsp;\u2265 0,&nbsp;<em>y<\/em>&nbsp;\u2265 0). As these single-atom bimetallic sites are cationic and anchored on a nonmetallic support, the catalyst of singly dispersed single-atom bimetallic sites is different from a single-atom alloy nanoparticle catalyst. The critical role of the 0.01 wt %Pt in the extraordinary catalytic performance calls on fundamental studies of the profound role of a trace amount of a metal in heterogeneous catalysis.<\/p>\n\n\n\n<p>This work was published in ACS Applied Materials &amp; Interfaces. <br>[T. Jiang, Y. Li, Y. Tang, S. Zhang, D. Le,&nbsp;<strong>T. S. Rahman<\/strong>, F. Tao, \u201cBreaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production.\u201d ACS Appl. Mater. Interfaces, 16, 21757 (2024). <a href=\"https:\/\/doi.org\/10.1021\/acsami.3c18160\">https:\/\/doi.org\/10.1021\/acsami.3c18160<\/a>] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>We have synthesized Pt1Zn3\/ZnO, also termed 0.01 wt %Pt\/ZnO-O2\u2013H2, as a catalyst containing singly dispersed single-atom bimetallic sites, also called a catalyst of singly dispersed bimetallic sites or a catalyst of isolated single-atom bimetallic sites. Its catalytic activity in partial oxidation of methanol to hydrogen at 290 \u00b0C is found to be 2\u20133 orders of &#8230; <a title=\"Breaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production\" class=\"read-more\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/jiang-et-al-2024\/\" aria-label=\"Read more about Breaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production\">Read more<\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"comment_status":"off","ping_status":"off","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[4],"tags":[],"class_list":["post-285","post","type-post","status-publish","format-standard","hentry","category-home-slider"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Breaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production - Professor Talat S. Rahman<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/jiang-et-al-2024\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Breaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production - Professor Talat S. Rahman\" \/>\n<meta property=\"og:description\" content=\"We have synthesized Pt1Zn3\/ZnO, also termed 0.01 wt %Pt\/ZnO-O2\u2013H2, as a catalyst containing singly dispersed single-atom bimetallic sites, also called a catalyst of singly dispersed bimetallic sites or a catalyst of isolated single-atom bimetallic sites. Its catalytic activity in partial oxidation of methanol to hydrogen at 290 \u00b0C is found to be 2\u20133 orders of ... 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