A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOx
Abstract Herein, a layer of molybdenum oxide (MoOx), a transition metal oxide (TMO), which has outstanding catalytic properties in combination with a carbon‐based thin film, is modified to improve the hydrogen production performance and protect the MoOx in acidic media. A thin film of graphene is tr...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-11-01
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| Series: | Carbon Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/cey2.340 |
| _version_ | 1827629781720498176 |
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| author | Kubra Aydin Seongwon Woo Vinit Kaluram Kanade Seulgi Choi Chisung Ahn Byungkwon Lim Taesung Kim |
| author_facet | Kubra Aydin Seongwon Woo Vinit Kaluram Kanade Seulgi Choi Chisung Ahn Byungkwon Lim Taesung Kim |
| author_sort | Kubra Aydin |
| collection | DOAJ |
| description | Abstract Herein, a layer of molybdenum oxide (MoOx), a transition metal oxide (TMO), which has outstanding catalytic properties in combination with a carbon‐based thin film, is modified to improve the hydrogen production performance and protect the MoOx in acidic media. A thin film of graphene is transferred onto the MoOx layer, after which the graphene structure is doped with N and S atoms at room temperature using a plasma doping method to modify the electronic structure and intrinsic properties of the material. The oxygen functional groups in graphene increase the interfacial interactions and electrical contacts between graphene and MoOx. The appearance of surface defects such as oxygen vacancies can result in vacancies in MoOx. This improves the electrical conductivity and electrochemically accessible surface area. Increasing the number of defects in graphene by adding dopants can significantly affect the chemical reaction at the interfaces and improve the electrochemical performance. These defects in graphene play a crucial role in the adsorption of H+ ions on the graphene surface and their transport to the MoOx layer underneath. This enables MoOx to participate in the reaction with the doped graphene. N‐ and S‐doped graphene (NSGr) on MoOx is active in acidic media and performs well in terms of hydrogen production. The initial overpotential value of 359 mV for the current density of −10 mA/cm2 is lowered to 228 mV after activation. |
| first_indexed | 2024-03-09T13:56:21Z |
| format | Article |
| id | doaj.art-9f23c58989cb43ed87b1b23fb156c4a4 |
| institution | Directory Open Access Journal |
| issn | 2637-9368 |
| language | English |
| last_indexed | 2024-03-09T13:56:21Z |
| publishDate | 2023-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Carbon Energy |
| spelling | doaj.art-9f23c58989cb43ed87b1b23fb156c4a42023-11-30T13:46:05ZengWileyCarbon Energy2637-93682023-11-01511n/an/a10.1002/cey2.340A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOxKubra Aydin0Seongwon Woo1Vinit Kaluram Kanade2Seulgi Choi3Chisung Ahn4Byungkwon Lim5Taesung Kim6SKKU Advanced Institute of Nanotechnology (SAINT), Department of Nano Science and Technology Sungkyunkwan University Suwon‐si Gyeonggi‐do Republic of KoreaSchool of Advanced Material Science and Engineering, Department of Nano Science and Technology Sungkyunkwan University Suwon Gyeonggi‐do Republic of KoreaSKKU Advanced Institute of Nanotechnology (SAINT), Department of Nano Science and Technology Sungkyunkwan University Suwon‐si Gyeonggi‐do Republic of KoreaSchool of Mechanical Engineering Sungkyunkwan University Suwon‐si Gyeonggi‐do Republic of KoreaHeat & Surface Technology R&D Department Korea Institute of Industrial Technology Siheung‐si Gyeonggi‐do Republic of KoreaSchool of Advanced Material Science and Engineering, Department of Nano Science and Technology Sungkyunkwan University Suwon Gyeonggi‐do Republic of KoreaSKKU Advanced Institute of Nanotechnology (SAINT), Department of Nano Science and Technology Sungkyunkwan University Suwon‐si Gyeonggi‐do Republic of KoreaAbstract Herein, a layer of molybdenum oxide (MoOx), a transition metal oxide (TMO), which has outstanding catalytic properties in combination with a carbon‐based thin film, is modified to improve the hydrogen production performance and protect the MoOx in acidic media. A thin film of graphene is transferred onto the MoOx layer, after which the graphene structure is doped with N and S atoms at room temperature using a plasma doping method to modify the electronic structure and intrinsic properties of the material. The oxygen functional groups in graphene increase the interfacial interactions and electrical contacts between graphene and MoOx. The appearance of surface defects such as oxygen vacancies can result in vacancies in MoOx. This improves the electrical conductivity and electrochemically accessible surface area. Increasing the number of defects in graphene by adding dopants can significantly affect the chemical reaction at the interfaces and improve the electrochemical performance. These defects in graphene play a crucial role in the adsorption of H+ ions on the graphene surface and their transport to the MoOx layer underneath. This enables MoOx to participate in the reaction with the doped graphene. N‐ and S‐doped graphene (NSGr) on MoOx is active in acidic media and performs well in terms of hydrogen production. The initial overpotential value of 359 mV for the current density of −10 mA/cm2 is lowered to 228 mV after activation.https://doi.org/10.1002/cey2.340heteroatom‐doped graphenehydrogen evolution reactionsmetal‐free catalyststransition metal oxidesvan der Waals (vdWs) heterostructures |
| spellingShingle | Kubra Aydin Seongwon Woo Vinit Kaluram Kanade Seulgi Choi Chisung Ahn Byungkwon Lim Taesung Kim A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOx Carbon Energy heteroatom‐doped graphene hydrogen evolution reactions metal‐free catalysts transition metal oxides van der Waals (vdWs) heterostructures |
| title | A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOx |
| title_full | A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOx |
| title_fullStr | A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOx |
| title_full_unstemmed | A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOx |
| title_short | A study of highly activated hydrogen evolution reaction performance in acidic media by 2D heterostructure of N and S doped graphene on MoOx |
| title_sort | study of highly activated hydrogen evolution reaction performance in acidic media by 2d heterostructure of n and s doped graphene on moox |
| topic | heteroatom‐doped graphene hydrogen evolution reactions metal‐free catalysts transition metal oxides van der Waals (vdWs) heterostructures |
| url | https://doi.org/10.1002/cey2.340 |
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