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Improved Photocatalytic H2 Evolution by Cobaloxime-Tethered Imidazole-Functionalized Periodic Mesoporous Organosilica
dc.contributor.author | Navarro, M. Ángeles | |
dc.contributor.author | Martín, Miguel | |
dc.contributor.author | Ruiz, José Rafael | |
dc.contributor.author | Jiménez-Sanchidrián, César | |
dc.contributor.author | Romero-Salguero, F.J. | |
dc.contributor.author | Esquivel, Dolores | |
dc.date.accessioned | 2023-02-03T08:03:08Z | |
dc.date.available | 2023-02-03T08:03:08Z | |
dc.date.issued | 2023 | |
dc.identifier.uri | http://hdl.handle.net/10396/24611 | |
dc.description.abstract | Molecular cobaloxime-based heterogeneous systems have attracted great interest during the last decades in light-driven hydrogen production. Here, we present a novel cobaloxime-tethered periodic mesoporous organosilica (PMO) hybrid (Im-EtPMO-Co) prepared through the immobilization of a molecular cobaloxime complex on the imidazole groups present in ethylene-bridged PMO. The successful assembly of a molecular cobaloxime catalyst via cobalt-imidazole axial ligation has been evidenced by several techniques, such as 13C NMR, Raman spectroscopy, ICP-MS, and XPS. The catalytic performance of Im-EtPMO-Co catalyst was essayed on the hydrogen evolution reaction (HER) under visible light in presence of a photosensitizer (Eosin Y) and an electron donor (TEOA). It showed an excellent hydrogen production of 95 mmol hydrogen at 2.5 h, which corresponded to a TON of 138. These results reflect an improved photocatalytic activity with respect to its homogenous counterpart [Co(dmgH)2(Im)Cl] as well as a previous cobaloxime-PMO system with pyridine axial ligation to the cobaloxime complex. | es_ES |
dc.format.mimetype | application/pdf | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | https://creativecommons.org/licenses/by/4.0/ | es_ES |
dc.source | Hydrogen, 4(1), 120-132 (2023) | es_ES |
dc.subject | Cobaloxime | es_ES |
dc.subject | Periodic mesoporous organosilicas | es_ES |
dc.subject | Photocatalysis | es_ES |
dc.subject | Hydrogen evolution reaction | es_ES |
dc.subject | Primary axial coordination | es_ES |
dc.title | Improved Photocatalytic H2 Evolution by Cobaloxime-Tethered Imidazole-Functionalized Periodic Mesoporous Organosilica | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publisherversion | https://doi.org/10.3390/hydrogen4010008 | es_ES |
dc.relation.projectID | Gobierno de España. RTI2018-101611-B-I00 | es_ES |
dc.relation.projectID | Gobierno de España. PDC2022-133973-I00 | es_ES |
dc.relation.projectID | Junta de Andalucía. Project ProyExcel_00492 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |