{"id":10225,"date":"2025-03-18T10:00:36","date_gmt":"2025-03-18T01:00:36","guid":{"rendered":"https:\/\/www.imass.nagoya-u.ac.jp\/?p=10225"},"modified":"2025-11-05T16:09:50","modified_gmt":"2025-11-05T07:09:50","slug":"20250318_muto","status":"publish","type":"post","link":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/research\/20250318_muto.html","title":{"rendered":"<strong>Captured the movement on the surface of metal nanoparticles that adsorb exhaust gases!<\/strong>"},"content":{"rendered":"<section class=\"e-box\">\r\n<h2 style=\"text-align: center;\"><span style=\"font-size: 28px;\">~ Visualized and elucidated the NO<sub>x<\/sub> purification process<\/span><br><span style=\"font-size: 28px;\"> by catalysts at the microscopic level ~<\/span><\/h2>\r\n<p>&nbsp;<\/p>\r\n<p><span style=\"font-size: 20px;\"><strong>Key Points of This Research<\/strong><\/span><\/p>\r\n<div style=\"padding: 30px; margin-bottom: 30px; border: 1px solid #333399; border-radius: 10px; background-color: #fafdff;\">\r\n<ul style=\"list-style-type: disc;\">\r\n<li><span style=\"font-size: 20px;\">Focusing on NO<sub>x<\/sub>, which is particularly difficult to purify among automobile exhaust gases, we conducted operando measurements\u00b9 by recording, in real time and at the atomic level, structural changes of rhodium nanoparticles during catalytic reactions in NO gas. Simultaneously, we detected time-dependent changes in the quantity of gases being decomposed\/produced through mass spectrometry.<br><br><\/span><\/li>\r\n<li><span style=\"font-size: 20px;\">We elucidated, at the atomic level, a series of surface structural changes in nanoparticles associated with the adsorption and decomposition of NO molecules. For the first time, we demonstrated that the catalytic reaction mechanism switches to different modes at low and high temperatures.<\/span><\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/section>\r\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.imass.nagoya-u.ac.jp\/wp\/wp-content\/uploads\/2025\/03\/muto_1-2.png\" alt=\"\" width=\"800\" height=\"457\" class=\"wp-image-11153 size-full aligncenter\" \/><\/p>\r\n<p style=\"text-align: center;\">Fig. 1\u3000Present RS-HVSTEM-QMS system used in the present study.<\/p>\r\n<p>&nbsp;<\/p>\r\n<ul class=\"e-gridList e-gridList-half\">\r\n<li>\r\n<figure class=\"e-gridList-img\"><br><br><br><br><br><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.imass.nagoya-u.ac.jp\/wp\/wp-content\/uploads\/2025\/03\/1-s2.0-S1748013225000799-gr1_lrg_s.jpg\" alt=\"\" width=\"900\" height=\"284\" class=\"aligncenter size-full wp-image-11142\" \/><\/figure>\r\n<p class=\"e-gridList-text\">Fig. 2. Structural changes of Rh particles in NO atmosphere at various temperature. (a)300 \u00b0C, (b) 500 \u00b0C, (c) 700 \u00b0C<\/p>\r\n<\/li>\r\n<li>\r\n<figure class=\"e-gridList-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.imass.nagoya-u.ac.jp\/wp\/wp-content\/uploads\/2025\/03\/1-s2.0-S1748013225000799-gr2_lrg_s.jpg\" alt=\"\" width=\"900\" height=\"590\" class=\"aligncenter size-full wp-image-11143\" \/><\/figure>\r\n<p class=\"e-gridList-text\">Fig. 3. Surface structural change of Rh nano particle at 500\u2103<\/p>\r\n<\/li>\r\n<li>\r\n<figure class=\"e-gridList-img\">\r\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.imass.nagoya-u.ac.jp\/wp\/wp-content\/uploads\/2025\/03\/1-s2.0-S1748013225000799-gr4_lrg_s.jpg\" alt=\"\" width=\"750\" height=\"573\" class=\"size-full wp-image-11154\" \/><\/p>\r\n<\/figure>\r\n<p class=\"e-gridList-text\">Fig. 4. Mass spectra as functions of temperature.<\/p>\r\n<\/li>\r\n<li>\r\n<figure class=\"e-gridList-img\"><\/figure>\r\n<\/li>\r\n<\/ul>\r\n<p>&nbsp;<\/p>\r\n<p><strong><span style=\"font-size: 20px;\">Publication info<\/span><br><\/strong><\/p>\r\n<hr \/>\r\n<section class=\"e-box\">\r\n<p>Journal title\uff1a<em> Nano Today<\/em><br>Article title\uff1aOperando analysis of dynamic structural changes on Rh nanoparticle surfaces during catalytic reduction of NO using an environmental high-voltage electron microscope\u2013quadrupole mass spectrometer<br>Authors\uff1a\u3000L-S. Tang \uff08Nagoya Univ.\uff09\u3001H. Tanaka \uff08Toyota Motor Co.\uff09\u3001S. Arai \uff08Nagoya Univ.\uff09\u3001T. Higuchi \uff08JEOL Inc.\uff09\u3001<span style=\"color: #333399;\"><a href=\"https:\/\/profs.provost.nagoya-u.ac.jp\/html\/100003755_en.html\" style=\"color: #333399;\">S. Muto \uff08Nagoya Univ.\uff09<\/a><\/span><br><span style=\"font-size: 16px;\">DOI\uff1a10.1016\/j.nantod.2025.102707<\/span><br><span style=\"font-size: 16px;\">URL\uff1a<a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1748013225000799\"><span style=\"color: #333399;\">https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1748013225000799<\/span><\/a><\/span><\/p>\r\n<\/section>\r\n<p>&nbsp;<\/p>\r\n<p><strong><span style=\"font-size: 20px;\">Correspondence<\/span><br><\/strong><\/p>\r\n<hr \/>\r\n<section class=\"e-box\">\r\n<p>AMTC, IMaSS, Nagoya Univ.<br>Prof. Shunsuke Muto<br>TEL\uff1a052-789-5200\u3000\u3000 FAX\uff1a052-789-5137<br>E-mail: smuto[at]imass.nagoya-u.ac.jp<br><span style=\"font-size: 12px;\">(Please replace [at] with @ when sending an email.)<\/span><\/p>\r\n<\/section>","protected":false},"excerpt":{"rendered":"<p>~ Visualized and elucidated the NOx purification process by catalysts at the microscopic level ~ &nbsp; Key Po [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":10220,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[389,392,393,241,347,390,391],"class_list":["post-10225","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research","tag-389","tag-392","tag-393","tag-241","tag-347","tag-390","tag-391"],"acf":[],"aioseo_notices":[],"publishpress_future_action":{"enabled":false,"date":"2026-05-06 14:17:07","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/posts\/10225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=10225"}],"version-history":[{"count":5,"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/posts\/10225\/revisions"}],"predecessor-version":[{"id":10230,"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/posts\/10225\/revisions\/10230"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/media\/10220"}],"wp:attachment":[{"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=10225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=10225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.imass.nagoya-u.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=10225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}