Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting
<p dir="ltr">Herein, we report the successful synthesis of Co<sub>9</sub>S<sub>8</sub> metal-sulfide nanowire trapped in multi walled carbon nanotube (MWCNT), which was subsequently found to be an effective catalyst for water splitting. Melamine pyrolysis toge...
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| مؤلفون آخرون: | , , |
| منشور في: |
2021
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| _version_ | 1864513561818038272 |
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| author | Anchu Ashok (14152020) |
| author2 | Anand Kumar (24122) Janarthanan Ponraj (8535585) Said A Mansour (16936962) |
| author2_role | author author author |
| author_facet | Anchu Ashok (14152020) Anand Kumar (24122) Janarthanan Ponraj (8535585) Said A Mansour (16936962) |
| author_role | author |
| dc.creator.none.fl_str_mv | Anchu Ashok (14152020) Anand Kumar (24122) Janarthanan Ponraj (8535585) Said A Mansour (16936962) |
| dc.date.none.fl_str_mv | 2021-02-01T00:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.electacta.2020.137642 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Development_of_Co_Co_sub_9_sub_S_sub_8_sub_metallic_nanowire_anchored_on_N-doped_CNTs_through_the_pyrolysis_of_melamine_for_overall_water_splitting/24087687 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Chemical sciences Physical chemistry Engineering Chemical engineering Oxygen evolution reaction (OER) Hydrogen evolution reaction (HER) Overall water splitting Melamine pyrolysis MWCNT catalysts |
| dc.title.none.fl_str_mv | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">Herein, we report the successful synthesis of Co<sub>9</sub>S<sub>8</sub> metal-sulfide nanowire trapped in multi walled carbon nanotube (MWCNT), which was subsequently found to be an effective catalyst for water splitting. Melamine pyrolysis together with a Co precursor results in MWCNTs, with the addition of sulfur during synthesis enhancing the surface area, pore size, and oxygen vacancy defects in the nanotubes. The hierarchical structure of Co/Co<sub>9</sub>S<sub>8</sub>/CNT products boosted the electron mobility and mass transport for both the oxygen evolution (OER) and hydrogen evolution reaction (HER) in alkaline medium. Doping the catalyst surface with Pyridinic-N atoms, Graphitic-N atoms and thioamide S-atoms dramatically improved the bifunctional electrocatalytic performance by lowering the overpotentials for OER and HER reactions. The Co/Co<sub>9</sub>S<sub>8</sub>/CNT generated a current density of 10 mAcm<sup>−2</sup> water-splitting current by applying a cell voltage of only 1.5 V. Further, Co/Co<sub>9</sub>S<sub>8</sub>/CNT showed excellent stability. The mechanism of Co<sub>8</sub>S<sub>9</sub> nanowire formation in the MWCNT was also investigated.</p><h2>Other Information</h2><p dir="ltr">Published in: Electrochimica Acta<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.electacta.2020.137642" target="_blank">https://dx.doi.org/10.1016/j.electacta.2020.137642</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_ca4198a9e6c8c3922d113cdf48e71b65 |
| identifier_str_mv | 10.1016/j.electacta.2020.137642 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/24087687 |
| publishDate | 2021 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splittingAnchu Ashok (14152020)Anand Kumar (24122)Janarthanan Ponraj (8535585)Said A Mansour (16936962)Chemical sciencesPhysical chemistryEngineeringChemical engineeringOxygen evolution reaction (OER)Hydrogen evolution reaction (HER)Overall water splittingMelamine pyrolysisMWCNT catalysts<p dir="ltr">Herein, we report the successful synthesis of Co<sub>9</sub>S<sub>8</sub> metal-sulfide nanowire trapped in multi walled carbon nanotube (MWCNT), which was subsequently found to be an effective catalyst for water splitting. Melamine pyrolysis together with a Co precursor results in MWCNTs, with the addition of sulfur during synthesis enhancing the surface area, pore size, and oxygen vacancy defects in the nanotubes. The hierarchical structure of Co/Co<sub>9</sub>S<sub>8</sub>/CNT products boosted the electron mobility and mass transport for both the oxygen evolution (OER) and hydrogen evolution reaction (HER) in alkaline medium. Doping the catalyst surface with Pyridinic-N atoms, Graphitic-N atoms and thioamide S-atoms dramatically improved the bifunctional electrocatalytic performance by lowering the overpotentials for OER and HER reactions. The Co/Co<sub>9</sub>S<sub>8</sub>/CNT generated a current density of 10 mAcm<sup>−2</sup> water-splitting current by applying a cell voltage of only 1.5 V. Further, Co/Co<sub>9</sub>S<sub>8</sub>/CNT showed excellent stability. The mechanism of Co<sub>8</sub>S<sub>9</sub> nanowire formation in the MWCNT was also investigated.</p><h2>Other Information</h2><p dir="ltr">Published in: Electrochimica Acta<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.electacta.2020.137642" target="_blank">https://dx.doi.org/10.1016/j.electacta.2020.137642</a></p>2021-02-01T00:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.electacta.2020.137642https://figshare.com/articles/journal_contribution/Development_of_Co_Co_sub_9_sub_S_sub_8_sub_metallic_nanowire_anchored_on_N-doped_CNTs_through_the_pyrolysis_of_melamine_for_overall_water_splitting/24087687CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/240876872021-02-01T00:00:00Z |
| spellingShingle | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting Anchu Ashok (14152020) Chemical sciences Physical chemistry Engineering Chemical engineering Oxygen evolution reaction (OER) Hydrogen evolution reaction (HER) Overall water splitting Melamine pyrolysis MWCNT catalysts |
| status_str | publishedVersion |
| title | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting |
| title_full | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting |
| title_fullStr | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting |
| title_full_unstemmed | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting |
| title_short | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting |
| title_sort | Development of Co/Co<sub>9</sub>S<sub>8</sub> metallic nanowire anchored on N-doped CNTs through the pyrolysis of melamine for overall water splitting |
| topic | Chemical sciences Physical chemistry Engineering Chemical engineering Oxygen evolution reaction (OER) Hydrogen evolution reaction (HER) Overall water splitting Melamine pyrolysis MWCNT catalysts |