Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction
Herein we report the catalytic ethanol decomposition over cobalt catalyst synthesized using conventional solution combustion synthesis (SCS). The reaction pathway proposed in-situ DRIFT analysis shows that the decomposition reaction proceeds through the formation of surface ethoxy intermediates that...
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| مؤلفون آخرون: | |
| التنسيق: | article |
| منشور في: |
2024
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://dx.doi.org/10.1016/j.ijhydene.2024.01.070 https://www.sciencedirect.com/science/article/pii/S036031992400079X http://hdl.handle.net/10576/66665 |
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| _version_ | 1857415083636817920 |
|---|---|
| author | Kumar, Anand |
| author2 | Ashok, Anchu |
| author2_role | author |
| author_facet | Kumar, Anand Ashok, Anchu |
| author_role | author |
| dc.creator.none.fl_str_mv | Kumar, Anand Ashok, Anchu |
| dc.date.none.fl_str_mv | 2024-01-11 2025-07-30T07:41:08Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://dx.doi.org/10.1016/j.ijhydene.2024.01.070 Ashok, A., & Kumar, A. (2024). Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction. International Journal of Hydrogen Energy, 75, 121-131. 0360-3199 https://www.sciencedirect.com/science/article/pii/S036031992400079X http://hdl.handle.net/10576/66665 121-131 75 1879-3487 |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Ethanol decomposition Graphene layers Carbon nanofiber Hydrogen production |
| dc.title.none.fl_str_mv | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Herein we report the catalytic ethanol decomposition over cobalt catalyst synthesized using conventional solution combustion synthesis (SCS). The reaction pathway proposed in-situ DRIFT analysis shows that the decomposition reaction proceeds through the formation of surface ethoxy intermediates that transformed into acetates and aldehydes which further decompose to releases CH4, H2 and CO2 with some deposition of carbon on the catalyst surface. The catalytic reaction shows 100 % ethanol conversion at 420 °C, with high selectivity of H2 in the output. The structural transformation of the catalyst and deposited carbon was analyzed using high-resolution transmission electron microscope (HRTEM). Presence of small Co nanoparticles (size <30 nm) surrounded with graphene and larger metal nanoparticles trapped inside MWCNTs was visible during a stability run over 50 h that motivates in proposing the reaction mechanism of the fluctuating metal nanoparticle along with carbon on the catalyst surface. Moreover, this work opens up the possibility of synthesizing highly dispersed Co nanoparticles in an efficient way without any complex experimental procedures and equipment that can further be used as effective catalysts in many industrial reactions. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | qu_bbd5b545fbb96f133d4f0a74df96ca02 |
| identifier_str_mv | Ashok, A., & Kumar, A. (2024). Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction. International Journal of Hydrogen Energy, 75, 121-131. 0360-3199 121-131 75 1879-3487 |
| language_invalid_str_mv | en |
| network_acronym_str | qu |
| network_name_str | Qatar University repository |
| oai_identifier_str | oai:qspace.qu.edu.qa:10576/66665 |
| publishDate | 2024 |
| publisher.none.fl_str_mv | Elsevier |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| spelling | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reactionKumar, AnandAshok, AnchuEthanol decompositionGraphene layersCarbon nanofiberHydrogen productionHerein we report the catalytic ethanol decomposition over cobalt catalyst synthesized using conventional solution combustion synthesis (SCS). The reaction pathway proposed in-situ DRIFT analysis shows that the decomposition reaction proceeds through the formation of surface ethoxy intermediates that transformed into acetates and aldehydes which further decompose to releases CH4, H2 and CO2 with some deposition of carbon on the catalyst surface. The catalytic reaction shows 100 % ethanol conversion at 420 °C, with high selectivity of H2 in the output. The structural transformation of the catalyst and deposited carbon was analyzed using high-resolution transmission electron microscope (HRTEM). Presence of small Co nanoparticles (size <30 nm) surrounded with graphene and larger metal nanoparticles trapped inside MWCNTs was visible during a stability run over 50 h that motivates in proposing the reaction mechanism of the fluctuating metal nanoparticle along with carbon on the catalyst surface. Moreover, this work opens up the possibility of synthesizing highly dispersed Co nanoparticles in an efficient way without any complex experimental procedures and equipment that can further be used as effective catalysts in many industrial reactions.This publication was made possible by NPRP grant ( NPRP14S-0302-210011 and NPRP8\u2013145\u20132\u2013066 ) from the Qatar National Research Fund (a member of Qatar Foundation ).Elsevier2025-07-30T07:41:08Z2024-01-11Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1016/j.ijhydene.2024.01.070Ashok, A., & Kumar, A. (2024). Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction. International Journal of Hydrogen Energy, 75, 121-131.0360-3199https://www.sciencedirect.com/science/article/pii/S036031992400079Xhttp://hdl.handle.net/10576/66665121-131751879-3487enhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:qspace.qu.edu.qa:10576/666652025-07-30T19:05:15Z |
| spellingShingle | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction Kumar, Anand Ethanol decomposition Graphene layers Carbon nanofiber Hydrogen production |
| status_str | publishedVersion |
| title | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction |
| title_full | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction |
| title_fullStr | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction |
| title_full_unstemmed | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction |
| title_short | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction |
| title_sort | Atomic level transition of graphene layer to carbon nanotubes over cobalt during ethanol decomposition reaction |
| topic | Ethanol decomposition Graphene layers Carbon nanofiber Hydrogen production |
| url | http://dx.doi.org/10.1016/j.ijhydene.2024.01.070 https://www.sciencedirect.com/science/article/pii/S036031992400079X http://hdl.handle.net/10576/66665 |