Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting
<p dir="ltr">Herein, we report a melamine and metal-salt based pyrolysis technique for synthesizing metal encapsulated <i>N</i>-doped carbon nanotube (CNTs) in form of bamboo-like CNTs and multi walled CNTs (MWCNT). Sulfur doping during synthesis greatly influenced the ph...
محفوظ في:
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| مؤلفون آخرون: | , , |
| منشور في: |
2020
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إضافة وسم
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| _version_ | 1864513557786263552 |
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| author | Anchu Ashok (14152020) |
| author2 | Anand Kumar (24122) Janarthanan Ponraj (8535585) Said A. Mansour (9692621) |
| author2_role | author author author |
| author_facet | Anchu Ashok (14152020) Anand Kumar (24122) Janarthanan Ponraj (8535585) Said A. Mansour (9692621) |
| author_role | author |
| dc.creator.none.fl_str_mv | Anchu Ashok (14152020) Anand Kumar (24122) Janarthanan Ponraj (8535585) Said A. Mansour (9692621) |
| dc.date.none.fl_str_mv | 2020-12-01T00:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.carbon.2020.08.047 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Synthesis_and_growth_mechanism_of_bamboo_like_N-doped_CNT_Graphene_nanostructure_incorporated_with_hybrid_metal_nanoparticles_for_overall_water_splitting/24249841 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Chemical sciences Organic chemistry Engineering Chemical engineering Environmental engineering Hydrogen evolution reaction (HER) Oxygen evolution reaction (OER) Overall water splitting |
| dc.title.none.fl_str_mv | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles 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 a melamine and metal-salt based pyrolysis technique for synthesizing metal encapsulated <i>N</i>-doped carbon nanotube (CNTs) in form of bamboo-like CNTs and multi walled CNTs (MWCNT). Sulfur doping during synthesis greatly influenced the physio-chemical properties of the material formed. X-ray diffraction (XRD) analysis confirms NiCo alloy (NiCo@CNT) formation that transformed into a hybrid NiCo/Co<sub>3</sub>Ni<sub>6</sub>S<sub>8</sub>/Co<sub>3</sub>O<sub>4</sub> nanocomposite (NiCoS@CNT) in presence of sulfur. A detailed study was conducted on the mechanism of the formation of metal-encapsulated <i>N</i>-doped CNT structures from the polymerization of melamine. The unique NiCoS@CNT structure renders high specific surface area (232.2 m<sup>2</sup>/g), large pore volume (0.92 cm<sup>2</sup>/g), and high lattice defect with abundant oxygen vacancies resulting in excellent performance for OER and HER in alkaline medium. The hybrid catalyst requires over-potentials of 198 mV and 295 mV to deliver a current-density of 10 mAcm<sup>−2</sup>, respectively for HER and OER. A cell voltage of only 1.53 V was required to deliver a long-term stable current-density of 10 mAcm<sup>−2</sup> for water splitting when NiCoS@CNT was used as both anode and cathode. Superior performance of NiCoS@CNT could be ascribed to high surface area, abundant active sites, fast charge-transfer rate, high pyridinic-N content and the presence of highly conductive CNT architecture.</p><h2>Other Information</h2><p dir="ltr">Published in: Carbon<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.carbon.2020.08.047" target="_blank">https://dx.doi.org/10.1016/j.carbon.2020.08.047</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_a2e95c5c605d2f3d5084f29fb69c1c6f |
| identifier_str_mv | 10.1016/j.carbon.2020.08.047 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/24249841 |
| publishDate | 2020 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splittingAnchu Ashok (14152020)Anand Kumar (24122)Janarthanan Ponraj (8535585)Said A. Mansour (9692621)Chemical sciencesOrganic chemistryEngineeringChemical engineeringEnvironmental engineeringHydrogen evolution reaction (HER)Oxygen evolution reaction (OER)Overall water splitting<p dir="ltr">Herein, we report a melamine and metal-salt based pyrolysis technique for synthesizing metal encapsulated <i>N</i>-doped carbon nanotube (CNTs) in form of bamboo-like CNTs and multi walled CNTs (MWCNT). Sulfur doping during synthesis greatly influenced the physio-chemical properties of the material formed. X-ray diffraction (XRD) analysis confirms NiCo alloy (NiCo@CNT) formation that transformed into a hybrid NiCo/Co<sub>3</sub>Ni<sub>6</sub>S<sub>8</sub>/Co<sub>3</sub>O<sub>4</sub> nanocomposite (NiCoS@CNT) in presence of sulfur. A detailed study was conducted on the mechanism of the formation of metal-encapsulated <i>N</i>-doped CNT structures from the polymerization of melamine. The unique NiCoS@CNT structure renders high specific surface area (232.2 m<sup>2</sup>/g), large pore volume (0.92 cm<sup>2</sup>/g), and high lattice defect with abundant oxygen vacancies resulting in excellent performance for OER and HER in alkaline medium. The hybrid catalyst requires over-potentials of 198 mV and 295 mV to deliver a current-density of 10 mAcm<sup>−2</sup>, respectively for HER and OER. A cell voltage of only 1.53 V was required to deliver a long-term stable current-density of 10 mAcm<sup>−2</sup> for water splitting when NiCoS@CNT was used as both anode and cathode. Superior performance of NiCoS@CNT could be ascribed to high surface area, abundant active sites, fast charge-transfer rate, high pyridinic-N content and the presence of highly conductive CNT architecture.</p><h2>Other Information</h2><p dir="ltr">Published in: Carbon<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.carbon.2020.08.047" target="_blank">https://dx.doi.org/10.1016/j.carbon.2020.08.047</a></p>2020-12-01T00:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.carbon.2020.08.047https://figshare.com/articles/journal_contribution/Synthesis_and_growth_mechanism_of_bamboo_like_N-doped_CNT_Graphene_nanostructure_incorporated_with_hybrid_metal_nanoparticles_for_overall_water_splitting/24249841CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/242498412020-12-01T00:00:00Z |
| spellingShingle | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting Anchu Ashok (14152020) Chemical sciences Organic chemistry Engineering Chemical engineering Environmental engineering Hydrogen evolution reaction (HER) Oxygen evolution reaction (OER) Overall water splitting |
| status_str | publishedVersion |
| title | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting |
| title_full | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting |
| title_fullStr | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting |
| title_full_unstemmed | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting |
| title_short | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting |
| title_sort | Synthesis and growth mechanism of bamboo like N-doped CNT/Graphene nanostructure incorporated with hybrid metal nanoparticles for overall water splitting |
| topic | Chemical sciences Organic chemistry Engineering Chemical engineering Environmental engineering Hydrogen evolution reaction (HER) Oxygen evolution reaction (OER) Overall water splitting |