Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion
<p dir="ltr">Copper-based catalysts, particularly those supported by ceria (CeO<sub>2</sub>), provide a cost-effective substitute for noble metals in hydrogenation reactions. The interaction between Cu and CeO<sub>2</sub> improves dispersion and generates esse...
محفوظ في:
| المؤلف الرئيسي: | |
|---|---|
| مؤلفون آخرون: | , |
| منشور في: |
2025
|
| الموضوعات: | |
| الوسوم: |
إضافة وسم
لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!
|
| _version_ | 1864513541018484736 |
|---|---|
| author | Parisa Ebrahimi (14152392) |
| author2 | Anand Kumar (24122) Mohammed J. Al-Marri (1400581) |
| author2_role | author author |
| author_facet | Parisa Ebrahimi (14152392) Anand Kumar (24122) Mohammed J. Al-Marri (1400581) |
| author_role | author |
| dc.creator.none.fl_str_mv | Parisa Ebrahimi (14152392) Anand Kumar (24122) Mohammed J. Al-Marri (1400581) |
| dc.date.none.fl_str_mv | 2025-08-21T15:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.jgsce.2025.205764 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Understanding_the_formation_of_active_site_in_copper_ceria_system_for_carbon_dioxide_catalytic_conversion/30018781 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Chemical engineering Environmental engineering Materials engineering CO2 reduction Ceria support Hydrogenation reactions Oxygen defect |
| dc.title.none.fl_str_mv | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">Copper-based catalysts, particularly those supported by ceria (CeO<sub>2</sub>), provide a cost-effective substitute for noble metals in hydrogenation reactions. The interaction between Cu and CeO<sub>2</sub> improves dispersion and generates essential active sites, such as Cu+ and oxygen vacancies, vital for catalytic efficiency. This study explores the creation of active sites in Cu/CeO<sub>2</sub> catalysts through adjustments in metal content and calcination conditions. The findings reveal that the 2 wt%Cu/CeO<sub>2</sub> catalyst calcined at 600 °C achieved the highest CO<sub>2</sub> conversion via reverse water gas shift reaction (RWGS) to CO, approximately 60 % at 600 °C, with minimal coke formation. Additionally, the catalyst also exhibited reactivity in the dry reforming of methane at elevated temperatures (above 800 °C). The characterization data suggest that the strong interaction among finely dispersed CuO and the CeO<sub>2</sub> support enhances electron transfer, leading to a higher density of surface oxygen vacancies and Cu+ species, which in turn promotes the redox cycle. The density of Cu+/(Cu++Cu<sup>2</sup>+) and surface oxygen vacancy correlates very well with the synthesis conditions and catalytic activity towards CO<sub>2</sub> conversion. The results suggest that Cu loading and calcination temperature in Cu/CeO<sub>2</sub> system could significantly enhance the presence of active sites for effective CO<sub>2</sub> hydrogenation.</p><h2>Other Information</h2><p dir="ltr">Published in: Gas Science and Engineering<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.jgsce.2025.205764" target="_blank">https://dx.doi.org/10.1016/j.jgsce.2025.205764</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_7507539abd819c873bd9230e7d46a5fc |
| identifier_str_mv | 10.1016/j.jgsce.2025.205764 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/30018781 |
| publishDate | 2025 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversionParisa Ebrahimi (14152392)Anand Kumar (24122)Mohammed J. Al-Marri (1400581)EngineeringChemical engineeringEnvironmental engineeringMaterials engineeringCO2 reductionCeria supportHydrogenation reactionsOxygen defect<p dir="ltr">Copper-based catalysts, particularly those supported by ceria (CeO<sub>2</sub>), provide a cost-effective substitute for noble metals in hydrogenation reactions. The interaction between Cu and CeO<sub>2</sub> improves dispersion and generates essential active sites, such as Cu+ and oxygen vacancies, vital for catalytic efficiency. This study explores the creation of active sites in Cu/CeO<sub>2</sub> catalysts through adjustments in metal content and calcination conditions. The findings reveal that the 2 wt%Cu/CeO<sub>2</sub> catalyst calcined at 600 °C achieved the highest CO<sub>2</sub> conversion via reverse water gas shift reaction (RWGS) to CO, approximately 60 % at 600 °C, with minimal coke formation. Additionally, the catalyst also exhibited reactivity in the dry reforming of methane at elevated temperatures (above 800 °C). The characterization data suggest that the strong interaction among finely dispersed CuO and the CeO<sub>2</sub> support enhances electron transfer, leading to a higher density of surface oxygen vacancies and Cu+ species, which in turn promotes the redox cycle. The density of Cu+/(Cu++Cu<sup>2</sup>+) and surface oxygen vacancy correlates very well with the synthesis conditions and catalytic activity towards CO<sub>2</sub> conversion. The results suggest that Cu loading and calcination temperature in Cu/CeO<sub>2</sub> system could significantly enhance the presence of active sites for effective CO<sub>2</sub> hydrogenation.</p><h2>Other Information</h2><p dir="ltr">Published in: Gas Science and Engineering<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.jgsce.2025.205764" target="_blank">https://dx.doi.org/10.1016/j.jgsce.2025.205764</a></p>2025-08-21T15:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.jgsce.2025.205764https://figshare.com/articles/journal_contribution/Understanding_the_formation_of_active_site_in_copper_ceria_system_for_carbon_dioxide_catalytic_conversion/30018781CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/300187812025-08-21T15:00:00Z |
| spellingShingle | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion Parisa Ebrahimi (14152392) Engineering Chemical engineering Environmental engineering Materials engineering CO2 reduction Ceria support Hydrogenation reactions Oxygen defect |
| status_str | publishedVersion |
| title | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion |
| title_full | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion |
| title_fullStr | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion |
| title_full_unstemmed | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion |
| title_short | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion |
| title_sort | Understanding the formation of active site in copper ceria system for carbon dioxide catalytic conversion |
| topic | Engineering Chemical engineering Environmental engineering Materials engineering CO2 reduction Ceria support Hydrogenation reactions Oxygen defect |