{"id":2241,"date":"2023-09-08T12:23:00","date_gmt":"2023-09-08T10:23:00","guid":{"rendered":"https:\/\/greenhydrogen-pathfinder.eu\/?p=2241"},"modified":"2024-06-19T14:43:50","modified_gmt":"2024-06-19T12:43:50","slug":"co-production-of-hydrogen-gas-and-hydrogen-peroxide-in-single-electrolysis-cell-using-modified-carbon-electrodes","status":"publish","type":"post","link":"http:\/\/greenhydrogen-pathfinder.eu\/?p=2241","title":{"rendered":"Co-production of hydrogen gas and hydrogen peroxide in single electrolysis cell using modified carbon electrodes"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2241\" class=\"elementor elementor-2241\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3c6f7ec0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3c6f7ec0\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6ba49327\" data-id=\"6ba49327\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3a16e7ba elementor-widget elementor-widget-text-editor\" data-id=\"3a16e7ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a70bed2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a70bed2\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9a1e3e1\" data-id=\"9a1e3e1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ffdc92b elementor-widget elementor-widget-text-editor\" data-id=\"ffdc92b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: left;\"><em>Poznan University of Technology, Institute of Chemistry and Technical Electrochemistry<\/em><\/p>\n<p style=\"text-align: left;\"><em style=\"font-size: 16px;\">Berdychowo 4, 61-131 Poznan, POLAND<\/em><\/p>\n<p style=\"text-align: left;\"><em>adam.slesinski@put.poznan.pl<\/em><\/p>\n<p style=\"text-align: left;\">\u00a0<\/p>\n<p>Water electrolysis has recently become an interesting route to produce valuable chemicals such as hydrogen and hydrogen peroxide. It is readily possible to obtain both products at separate electrodes during water reduction and oxidation, respectively. This not only eliminates the necessity for further separation, but also accounts for cell current efficiency. One of the most important aspects in the design of electrolysis cells are the materials of electrodes, as they mostly govern the overpotentials encountered during the electrochemical reactions.<\/p>\n<p>Noble metals are known to serve perfectly as hydrogen evolution catalysts, almost totally reducing the overpotential. However, due to their scarce availability, they are incorporated within carbon composites with loadings tending to be reduced to values as low as 0.05 mg cm<sup>-2<\/sup>.<\/p>\n<p>On the other hand, noble metals in positive electrode facilitate the 4e<sup>&#8211;<\/sup> water oxidation to produce gaseous oxygen, rather than hydrogen peroxide via 2e<sup>&#8211;<\/sup> pathway. Therefore, there is a need to search for catalyst with selectivity towards the latter reaction.<\/p>\n<p>The literature points to the use of catalysts mainly based on metal oxides and metal sulphides. While these substances properly catalyse the reaction of interest, the efficient production of H<sub>2<\/sub>O<sub>2<\/sub> can also be triggered using modified activated carbon materials, which production can be more scalable and thus cheaper.<\/p>\n<p>The adjustment of activated carbon surface chemistry in this work is done using widely available oxidants: nitric acid, ammonium persulphate and hydrogen peroxide. The rates of hydrogen and oxygen (as by-product) evolution are monitored with pressure transducer coupled with syringe pump for progressive gas accumulation. This, together with quantitative chemical analysis of hydrogen peroxide produced give full insight into the ongoing processes. It turned out during investigation that the gases are being produced even when no associated current leap is observed in cyclic voltammetry experiment. It provides an important observation to be considered during carrying out the electrolysis process.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"288\">\n<p>A)<img fetchpriority=\"high\" decoding=\"async\" data-attachment-id=\"2247\" data-permalink=\"http:\/\/greenhydrogen-pathfinder.eu\/?attachment_id=2247\" data-orig-file=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-1.png?fit=412%2C316\" data-orig-size=\"412,316\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"mcgv 1\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-1.png?fit=300%2C230\" data-large-file=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-1.png?fit=412%2C316\" data-recalc-dims=\"1\" class=\"wp-image-2247 size-medium aligncenter\" src=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-1-300x230.png?resize=300%2C230&#038;ssl=1\" alt=\"\" width=\"300\" height=\"230\" srcset=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-1.png?resize=300%2C230 300w, https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-1.png?w=412 412w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<\/td>\n<td width=\"288\">\n<p>B)<img decoding=\"async\" data-attachment-id=\"2248\" data-permalink=\"http:\/\/greenhydrogen-pathfinder.eu\/?attachment_id=2248\" data-orig-file=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-2.png?fit=362%2C294\" data-orig-size=\"362,294\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"mcgv 2\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-2.png?fit=300%2C244\" data-large-file=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-2.png?fit=362%2C294\" data-recalc-dims=\"1\" class=\"size-medium wp-image-2248 aligncenter\" src=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-2-300x244.png?resize=300%2C244&#038;ssl=1\" alt=\"\" width=\"300\" height=\"244\" srcset=\"https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-2.png?resize=300%2C244 300w, https:\/\/i0.wp.com\/greenhydrogen-pathfinder.eu\/wp-content\/uploads\/2024\/05\/mcgv-2.png?w=362 362w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"288\">\u00a0<\/td>\n<td width=\"288\">\u00a0<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"576\">\n<p>Figure 1. Cyclic voltammetry of the system based on Kuraray YP-50F in 1 mol L<sup>-1<\/sup> NaHCO<sub>3<\/sub> electrolyte. A) cyclic voltammogram, B) CV in the time domain showing pressure variation due to gases production.<\/p>\n<p>This project has received funding from the European Innovation Council (EIC) under grant agreement No 101069981. The EIC receives support from the European Union\u2019s Horizon Europe Research and Innovation Programme.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>International Society of Electrochemistry Annual Meeting 2023, 3rd to 8th September 2023, Lyon, France<\/p>\n","protected":false},"author":225490288,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[6335],"tags":[],"class_list":["post-2241","post","type-post","status-publish","format-standard","hentry","category-abstracts"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - 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