{"id":62873,"date":"2024-03-26T15:42:34","date_gmt":"2024-03-26T13:42:34","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=62873"},"modified":"2024-03-26T15:42:34","modified_gmt":"2024-03-26T13:42:34","slug":"these-kilaparthi-s-k-catalyseurs-electrochimiques-a-base-de-carbone-pour-la-reduction-du-co2-lhydrolyse-du-pet-et-la-separation-de-leau-en-vue-de-produits-a-valeur-ajoutee","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/these-2023\/these-kilaparthi-s-k-catalyseurs-electrochimiques-a-base-de-carbone-pour-la-reduction-du-co2-lhydrolyse-du-pet-et-la-separation-de-leau-en-vue-de-produits-a-valeur-ajoutee.html","title":{"rendered":"THESIS: KILAPARTHI S.K. - Carbon-based electrochemical catalysts for CO2 reduction, PET hydrolysis and water separation for value-added products"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_18tuacdjsr4yr\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-62873'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-3ffed6e7bd5671f0a26814bc461ddc38\">\n#top .av-special-heading.av-av_heading-3ffed6e7bd5671f0a26814bc461ddc38{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-av_heading-3ffed6e7bd5671f0a26814bc461ddc38 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-3ffed6e7bd5671f0a26814bc461ddc38 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-3ffed6e7bd5671f0a26814bc461ddc38 av-special-heading-h2  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : KILAPARTHI S.K.- Catalyseurs \u00e9lectrochimiques \u00e0 base de carbone pour la r\u00e9duction du CO2, l\u2018hydrolyse du PET et la s\u00e9paration de l\u2019eau en vue de produits \u00e0 valeur ajout\u00e9e<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-2f4600354c0449b610997916bbd9b6bc'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-68e036126b913e5028f77311dc66b825\">\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825{\ncolor:#bfbfbf;\nborder-color:#bfbfbf;\n}\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825 .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-68e036126b913e5028f77311dc66b825 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='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<p><strong>THESE : KILAPARTHI S.K<br \/>\n<\/strong><\/p>\n<p>Soutenance : 14 D\u00e9cembre 2023<strong><br \/>\n<\/strong><span class=\"titre\">Th\u00e8se de doctorat en Micro-nanosyst\u00e8mes et capteurs, Universit\u00e9 de Lille, ED ENGSY<\/span><\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-628129dba2299b2ecd65ebfc92eac29d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5><strong><span style=\"color: #800000;\">Jury :<\/span><\/strong><\/h5>\n<h5>Summary:<\/h5>\n<p>Cette \u00e9tude aborde les principaux d\u00e9fis mondiaux tels que les \u00e9missions de CO2, la crise \u00e9nerg\u00e9tique et la mauvaise gestion des d\u00e9chets plastiques PET, qui non seulement polluent l\u2019environnement mais contribuent \u00e9galement aux \u00e9missions de CO2 lors de l\u2019incin\u00e9ration. L\u2019approche innovante pr\u00e9sent\u00e9e dans cette th\u00e8se offre une double solution, abordant simultan\u00e9ment les d\u00e9chets PET et les \u00e9missions de CO2. Deux syst\u00e8mes remarquables ont \u00e9t\u00e9 explor\u00e9s dans cette th\u00e8se. Le premier utilisait du carbonate d\u2019oxyde de bismuth (BOC) fonctionnalis\u00e9 de l\u2019oxyde de graph\u00e8ne r\u00e9duit (rGO) pour l\u2019\u00e9lectror\u00e9duction cathodique du CO2 (CO2RR), tandis que CuCoO sur rGO \u00e9tait utilis\u00e9 pour l\u2019oxydation anodique de l\u2019hydrolysat de PET. De mani\u00e8re impressionnante, le catalyseur anodique CuCoO@rGO a affich\u00e9 une \u00e9lectroactivit\u00e9 exceptionnelle, atteignant un rendement faradique (FE) exceptionnel de 85,7 % \u00e0 1,5 V par rapport \u00e0 RHE. Simultan\u00e9ment, le catalyseur cathodique BOC@rGO a d\u00e9montr\u00e9 un FE impressionnant de 97,4 % \u00e0 -0,8 V par rapport au RHE, facilitant la production de formiate \u00e0 partir de CO2RR. Lorsqu\u2019elle est int\u00e9gr\u00e9e dans une configuration d\u2019\u00e9lectrolyseur, cette approche a abouti \u00e0 une production d\u2019acide formique \u00e0 une faible tension de cellule de 1,9 V et \u00e0 un FE formiate remarquable de 151,8 % \u00e0 10 mA cm-2. Un autre syst\u00e8me utilisait une \u00e9lectrode 3D en feutre de charbon actif (aCF) comme substrat et du bismuth a \u00e9t\u00e9 d\u00e9pos\u00e9 \u00e9lectrochimiquement sur le CF (Bi@aCF) qui agit comme la cathode CO2RR et un feutre de carbone d\u00e9pos\u00e9 au phosphate de nickel-cobalt (NiCoPOx@CF) pour l\u2019anode. Proc\u00e9d\u00e9 d\u2019oxydation de l\u2019hydrolysat de PET. Cette configuration a atteint un FE \u00e9lev\u00e9 de 94 % pendant CO2RR \u00e0 -0,8 V par rapport au RHE, produisant du formiate, et un FE de 95 % pour l\u2019oxydation anodique de l\u2019hydrolysat de PET pour former un formiate \u00e0 un faible potentiel de 1,5 6 V par rapport au RHE. Remarquablement, l\u2019\u00e9lectrolyseur \u00e0 deux \u00e9lectrodes a atteint un FE extraordinaire de 157 % pour produire du formiate \u00e0 une tension de cellule de 1,8 V. Cette perc\u00e9e repr\u00e9sente une nouvelle voie pour valoriser les d\u00e9chets de PET, r\u00e9duire les \u00e9missions de CO2 et promouvoir la durabilit\u00e9 environnementale. De plus, nos exp\u00e9riences ont \u00e9galement port\u00e9 sur l\u2019\u00e9lectrolyse de l\u2019eau, o\u00f9 une nouvelle strat\u00e9gie impliquant du Ru int\u00e9gr\u00e9 dans une matrice de nitrure de carbone a \u00e9t\u00e9 propos\u00e9e. Cette approche, utilisant une structure organique covalente 2D CIN-1 avec Ru + 2 coordonn\u00e9, a abouti \u00e0 des nanoparticules d\u2019oxyde de Ru avec des sites Ru de faible valence dispos\u00e9s en nanofils entre des couches de nitrure de carbone graphitique apr\u00e8s pyrolyse. Ce mat\u00e9riau pr\u00e9sentait des surpotentiels significativement inf\u00e9rieurs pour la r\u00e9action de d\u00e9gagement d\u2019hydrog\u00e8ne (HER) et la r\u00e9action de d\u00e9gagement d\u2019oxyg\u00e8ne (OER) par rapport aux catalyseurs de r\u00e9f\u00e9rence au Pt et au RuO2, d\u00e9montrant une stabilit\u00e9 catalytique remarquable. Cette d\u00e9couverte est extr\u00eamement prometteuse pour faire progresser le domaine du fractionnement de l\u2019eau et contribuer au d\u00e9veloppement de solutions \u00e9nerg\u00e9tiques durables.<\/p>\n<h5>Abstract:<\/h5>\n<p>This study addresses major global challenges such as CO2 emissions, the energy crisis and the poor management of PET plastic waste, which not only pollutes the environment but also contributes to CO2 emissions during incineration. The innovative approach presented in this thesis offers a dual solution, addressing PET waste and CO2 emissions simultaneously. Two remarkable systems were explored in this thesis. The first used bismuth oxide carbonate (BOC) functionalised with reduced graphene oxide (rGO) for the cathodic electroreduction of CO2 (CO2RR), while CuCoO on rGO was used for the anodic oxidation of PET hydrolysate. Impressively, the anodic CuCoO@rGO catalyst exhibited exceptional electroactivity, achieving an outstanding faradic efficiency (FE) of 85.7% at 1.5 V compared with RHE. At the same time, the BOC@rGO cathode catalyst demonstrated an impressive FE of 97.4% at -0.8 V compared with RHE, facilitating the production of formate from CO2RR. When integrated into an electrolyser configuration, this approach resulted in formic acid production at a low cell voltage of 1.9 V and a remarkable formate EF of 151.8% at 10 mA cm-2. Another system used an activated carbon felt (aCF) 3D electrode as the substrate and bismuth was electrochemically deposited on the CF (Bi@aCF) which acts as the CO2RR cathode and a nickel-cobalt phosphate deposited carbon felt (NiCoPOx@CF) for the anode. PET hydrolysate oxidation process. This configuration achieved a high EF of 94% during CO2RR at -0.8 V compared to RHE, producing formate, and an EF of 95% for anodic oxidation of PET hydrolysate to form formate at a low potential of 1.5 6 V compared to RHE. Remarkably, the two-electrode electrolyser achieved an extraordinary EF of 157% to produce formate at a cell voltage of 1.8 V. This breakthrough represents a new way of recovering PET waste, reducing CO2 emissions and promoting environmental sustainability. In addition, our experiments have also focused on water electrolysis, where a new strategy involving Ru embedded in a carbon nitride matrix has been proposed. This approach, using a CIN-1 2D covalent organic structure with Ru + 2 coordinates, resulted in Ru oxide nanoparticles with low-valence Ru sites arranged as nanowires between graphitic carbon nitride layers after pyrolysis. This material exhibited significantly lower overpotentials for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) compared with reference Pt and RuO2 catalysts, demonstrating remarkable catalytic stability. This discovery is extremely promising for advancing the field of water fractionation and contributing to the development of sustainable energy solutions.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[318],"tags":[],"class_list":["post-62873","post","type-post","status-publish","format-standard","hentry","category-these-2023"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/62873","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\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=62873"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/62873\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=62873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=62873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=62873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}