{"id":27323,"date":"2024-06-21T15:25:42","date_gmt":"2024-06-21T07:25:42","guid":{"rendered":"\/phys\/?page_id=27323"},"modified":"2024-06-27T14:42:45","modified_gmt":"2024-06-27T06:42:45","slug":"operando-x-ray-and-mass-spectroscopy-probing-rgo-mediated-co-catalysts-for-boosting-hydrogen-evolution-reaction-2","status":"publish","type":"page","link":"\/phys\/?page_id=27323","title":{"rendered":"Operando X-ray and Mass Spectroscopy Probing rGO-mediated Co Catalysts for Boosting Hydrogen Evolution Reaction"},"content":{"rendered":"\n<p class=\"has-medium-font-size\">\u59d3\u540d\uff1a\u6b50\u8332\u6bd4\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u838a\u7a0b\u8c6a<\/p>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-container container\" style=\"position:relative\" block_id=\"lxobnzmlee7hkybzqi5\"><style><\/style>\n<div class=\"wp-block-tkuwpbs5-bs5-row row\">\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-6 align-self-start\">\n<div class=\"wp-block-stackable-image stk-block-image stk-block stk-59db34c\" data-block-id=\"59db34c\"><figure><span class=\"stk-img-wrapper stk-image--shape-stretch\"><img decoding=\"async\" loading=\"lazy\" class=\"stk-img wp-image-27502\" src=\"\/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u6b50\u8332\u6bd4-scaled.jpg\" width=\"1812\" height=\"2560\" srcset=\"\/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u6b50\u8332\u6bd4-scaled.jpg 1812w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u6b50\u8332\u6bd4-212x300.jpg 212w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u6b50\u8332\u6bd4-725x1024.jpg 725w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u6b50\u8332\u6bd4-768x1085.jpg 768w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u6b50\u8332\u6bd4-1087x1536.jpg 1087w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u6b50\u8332\u6bd4-1450x2048.jpg 1450w\" sizes=\"(max-width: 1812px) 100vw, 1812px\" \/><\/span><\/figure><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-6 align-self-start\">\n<p><strong>Abstract<\/strong><\/p>\n\n\n\n<p>nserting underlying reduced graphene oxide (rGO) into Co aims to regulate the chemical integrity and catalytic ability of the Co upper-layer for hydrogen evolution reaction (HER) as a green-hydrogen goal. Consequently, an <em>operando <\/em>mass spectrometer indicates 3.8 times more considerable hydrogen (<em>m\/z <\/em>= 2) generation in Co\/rGO than in the Co at the potential of -2.12 V <em>vs <\/em>Ag\/AgCl. The other <em>operando <\/em>spectroscopical approaches in the soft and hard X-ray illustrate the chemical oxidation evolution of electronic Co-3<em>d <\/em>and Co-4<em>p <\/em>states in terms of the underlying rGO contribution, varied with dynamic chemical adsorption of Co-O(H), Co-Hads, and H2 molecules desorption. The two-dimensional <em>R-k <\/em>domain in the Co\/rGO sample indicates two significant blocks of metal Co and Co-O(H) shifted with the functions of the time- and potential-related utilization, compared to a slight change in the Co sample. A unique examination through the cathodic potential and catalytic process is regarded as the phase transition from the initial middle oxidation state to high oxidation (Co- O(H)) and to de-oxidation (Co-H) in the lattice structure coordination and oxidation state, particularly the intermediate Co<sup>0<\/sup> existence and H2 generation. Incorporating rGO provides the regeneration, sustained stability, and decreasing energy barrier of Co-Hads catalysts under density functional theory (DFT) calculation, thereby augmenting the HER enhancement through the alternative Volmer-Heyrovsky process. Combination of <em>in-situ <\/em>mass spectrometer, soft, and hard X-ray provides novel evidence regarding HER enhancement of the Co\/rGO nanocomposite. This study offers insights into the chemical composition, electronic structure, and active role of Co bonded with\/without the extinct OH and H bonds, advancing our comprehension of electrocatalytic reactions, thus taking our knowledge of composite materials to stepwise electrocatalytic reactions forward. This cutting-edge experiment under <em>in-situ <\/em>environment and DFT studies gives critical information regarding the catalytic mechanism and chemical stability of the Co and rGO materials.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u59d3\u540d\uff1a\u6b50\u8332\u6bd4\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u838a\u7a0b\u8c6a<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"wp-custom-template-detail-4-post","meta":{"_uag_custom_page_level_css":"","footnotes":""},"acf":[],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","twp-icon":"","1536x1536":"","2048x2048":""},"post_excerpt_stackable":"<p>\u59d3\u540d\uff1a\u6b50\u8332\u6bd4\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u838a\u7a0b\u8c6a Abstract nserting underlying reduced graphene oxide (rGO) into Co aims to regulate the chemical integrity and catalytic ability of the Co upper-layer for hydrogen evolution reaction (HER) as a green-hydrogen goal. Consequently, an operando mass spectrometer indicates 3.8 times more considerable hydrogen (m\/z = 2) generation in Co\/rGO than in the Co at the potential of -2.12 V vs Ag\/AgCl. The other operando spectroscopical approaches in the soft and hard X-ray illustrate the chemical oxidation evolution of electronic Co-3d and Co-4p states in terms of the underlying rGO contribution, varied with dynamic chemical adsorption of Co-O(H), Co-Hads, and H2&hellip;<\/p>\n","category_list":"","author_info":{"name":"\u9ec3\u9806\u8208","url":"\/phys\/?author=10"},"comments_num":"0 comments","uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"twp-icon":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"\u9ec3\u9806\u8208","author_link":"\/phys\/?author=10"},"uagb_comment_info":0,"uagb_excerpt":"\u59d3\u540d\uff1a\u6b50\u8332\u6bd4\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u838a\u7a0b\u8c6a","_links":{"self":[{"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages\/27323"}],"collection":[{"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"\/phys\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"\/phys\/index.php?rest_route=\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"\/phys\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=27323"}],"version-history":[{"count":3,"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages\/27323\/revisions"}],"predecessor-version":[{"id":27504,"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages\/27323\/revisions\/27504"}],"wp:attachment":[{"href":"\/phys\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}