{"id":77702,"date":"2026-03-31T11:12:03","date_gmt":"2026-03-31T09:12:03","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=77702"},"modified":"2026-04-02T08:09:10","modified_gmt":"2026-04-02T06:09:10","slug":"vers-une-alternative-plus-durable-de-la-transformation-du-methane-en-hydrogene-et-hydrocarbures","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/vers-une-alternative-plus-durable-de-la-transformation-du-methane-en-hydrogene-et-hydrocarbures.html","title":{"rendered":"Vers une alternative plus durable de la transformation du m\u00e9thane en hydrog\u00e8ne et hydrocarbures"},"content":{"rendered":"<section  class='av_textblock_section av-mnee40a2-47197878d0a745d1504672cc2ea74e08'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2 style=\"text-align: center; line-height: 30pt;\"><span style=\"color: #5753a3;\">Vers une alternative plus durable de la transformation du m\u00e9thane en hydrog\u00e8ne et hydrocarbures gr\u00e2ce \u00e0 une transition de phase \u00e9lectronique dans le dioxyde de vanadium<\/span><\/h2>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mneexonv-7e1ff5a429c5ebacd9f14591978e0060\">\n#top .hr.av-mneexonv-7e1ff5a429c5ebacd9f14591978e0060{\nmargin-top:20px;\nmargin-bottom:30px;\n}\n.hr.av-mneexonv-7e1ff5a429c5ebacd9f14591978e0060 .hr-inner{\nwidth:500px;\nborder-color:#7a75dd;\nmax-width:45%;\n}\n.hr.av-mneexonv-7e1ff5a429c5ebacd9f14591978e0060 .av-seperator-icon{\ncolor:#7a75dd;\n}\n<\/style>\n<div  class='hr av-mneexonv-7e1ff5a429c5ebacd9f14591978e0060 hr-custom  avia-builder-el-1  el_after_av_textblock  el_before_av_three_fifth  hr-center hr-icon-yes'><span class='hr-inner inner-border-av-border-fat'><span class=\"hr-inner-style\"><\/span><\/span><span class='av-seperator-icon' aria-hidden='true' data-av_icon='\ue808' data-av_iconfont='entypo-fontello'><\/span><span class='hr-inner inner-border-av-border-fat'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<div  class='flex_column av-122cxvq-8d9fb4a0686a346883748206ebdc46af av_three_fifth  avia-builder-el-2  el_after_av_hr  el_before_av_two_fifth  first flex_column_div'     ><section  class='av_textblock_section av-mnee7lt9-b1e8807f825647a77bb3a7d23438312d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><blockquote>\n<p style=\"line-height: 20pt; text-align: justify;\">Optimiser l\u2019efficacit\u00e9 des photocatalyseurs constitue un enjeu cl\u00e9 pour la conversion du m\u00e9thane. Elle repose sur l\u2019absorption lumineuse et le transport des charges photo-induites vers la surface des photocatalyseurs. <strong><span style=\"color: #7a75dd;\">Des chercheurs\u00a0<\/span><span style=\"color: #7a75dd;\">viennent de montrer que le dioxyde de vanadium VO\u2082, qui change d\u2019\u00e9tat \u00e9lectronique \u00e0 68 \u00b0C, facilite consid\u00e9rablement le transfert de ces charges pour r\u00e9agir avec le m\u00e9thane lors de cette transition.<\/span><\/strong> Des films minces de VO\u2082 permettent ainsi une conversion photocatalytique record du m\u00e9thane en dihydrog\u00e8ne, \u00e9thane et propane. En r\u00e9duisant leur \u00e9paisseur, la r\u00e9action conduit \u00e0 un seul hydrocarbure, le propane, offrant une m\u00e9thode plus durable que les proc\u00e9d\u00e9s industriels actuels.<\/p>\n<\/blockquote>\n<h5><\/h5>\n<p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/03\/visuel_bruno-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-77708\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/03\/visuel_bruno-1.jpg\" alt=\"\" width=\"700\" height=\"467\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/03\/visuel_bruno-1.jpg 1000w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/03\/visuel_bruno-1-300x200.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/03\/visuel_bruno-1-768x512.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/03\/visuel_bruno-1-18x12.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2026\/03\/visuel_bruno-1-705x470.jpg 705w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n<\/div><\/section><\/div>\n<div  class='flex_column av-s6g0g6-a653df8b2b8e106a7228b893c0576212 av_two_fifth  avia-builder-el-4  el_after_av_three_fifth  avia-builder-el-last  flex_column_div'     ><section  class='av_textblock_section av-mneeee81-3e5a6fd2acadd3fb80612ecb912b08e4'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: justify;\">Le m\u00e9thane est un gaz tr\u00e8s abondant mais difficile \u00e0 transformer, car il r\u00e9agit peu. Pour y parvenir, les chercheurs utilisent des photocatalyseurs, mat\u00e9riaux qui absorbent l\u2019\u00e9nergie lumineuse et l\u2019exploitent ensuite pour produire une r\u00e9action chimique. Mais une grande partie de cette \u00e9nergie se dissipe rapidement, ce qui rend inefficace l\u2019activation du m\u00e9thane \u00e0 la surface des photocatalyseurs.<br \/>\n<strong><span style=\"color: #7a75dd;\">Une \u00e9quipe de scientifiques<sup>(1)<\/sup> a montr\u00e9 qu\u2019un compos\u00e9, l\u2019oxyde de vanadium VO\u2082, poss\u00e8de une propri\u00e9t\u00e9 id\u00e9ale pour contourner ce probl\u00e8me.<\/span><\/strong><br \/>\n\u00c0 68 \u00b0C, le VO\u2082 change brutalement d\u2019\u00e9tat : il passe d\u2019isolant \u00e0 m\u00e9tallique. Pendant cette transition, les deux \u00e9tats coexistent en s\u2019entrem\u00ealant \u00e0 l\u2019\u00e9chelle nanom\u00e9trique. Les nombreuses fronti\u00e8res entre ces zones s\u00e9parent efficacement les charges produites par la lumi\u00e8re. Celles-ci atteignent alors la surface du mat\u00e9riau en grand nombre, ce qui rend la r\u00e9action beaucoup plus efficace.<br \/>\nGr\u00e2ce \u00e0 cette transition, de minces films de VO\u2082 transforment le m\u00e9thane en mol\u00e9cules utiles comme l\u2019hydrog\u00e8ne, l\u2019\u00e9thane ou le propane, avec, sous certaines conditions exp\u00e9rimentales, une production s\u00e9lective d\u2019un des deux hydrocarbures. <strong><span style=\"color: #7a75dd;\">La transition peut m\u00eame \u00eatre d\u00e9clench\u00e9e \u00e9lectriquement \u00e0 plus basse temp\u00e9rature, ouvrant la voie \u00e0 des photocatalyseurs plus performants et moins \u00e9nergivores.<\/span><\/strong><\/p>\n<h5>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-7d392141e55d67f91491060640d42df9\">\n.av_font_icon.av-mqde7m-1-9-7d392141e55d67f91491060640d42df9{\ncolor:#7a75dd;\nborder-color:#7a75dd;\n}\n.av_font_icon.av-mqde7m-1-9-7d392141e55d67f91491060640d42df9 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-7d392141e55d67f91491060640d42df9 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue826' data-av_iconfont='entypo-fontello' ><\/span><\/span> <span style=\"color: #7a75dd;\"><a style=\"color: #7a75dd;\" href=\"https:\/\/www.insis.cnrs.fr\/fr\/cnrsinfo\/la-transition-metal-isolant-au-benefice-de-la-photocatalyse\" target=\"_blank\" rel=\"noopener\">En savoir +<\/a><\/span><\/h5>\n<hr \/>\n<p><em> (1)\u00a0<\/em><em>IEMN (Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, Junia), UCCS (Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois), UMET (CNRS, INRAE, Centrale Lille), LASIRE (Univ. Lille, CNRS), LPEM (ESPCI Paris, PSL Universit\u00e9, CNRS, Sorbonne Universit\u00e9), XLIM et IRCER (CNRS\/ Universit\u00e9 de Limoges).<\/em><\/p>\n<p><span style=\"color: #f16728;\"><strong>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-11665d57be50482f466d54b8a3268ec6\">\n.av_font_icon.av-mqde7m-11665d57be50482f466d54b8a3268ec6{\ncolor:#f16728;\nborder-color:#f16728;\n}\n.av_font_icon.av-mqde7m-11665d57be50482f466d54b8a3268ec6 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-11665d57be50482f466d54b8a3268ec6 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/strong><\/span>Contact : bruno.grandidier<img loading=\"lazy\" decoding=\"async\" class=\"align=absbottom wp-image-73335 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6.png\" alt=\"\" width=\"16\" height=\"14\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6.png 16w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6-14x12.png 14w\" sizes=\"auto, (max-width: 16px) 100vw, 16px\" \/>univ-lille.fr<\/p>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-77702","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/77702","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=77702"}],"version-history":[{"count":25,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/77702\/revisions"}],"predecessor-version":[{"id":77943,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/77702\/revisions\/77943"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=77702"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=77702"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=77702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}