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| Pàgina inicial > Articles > Articles publicats > Abnormal copper coordination obtained by a TiO2 overlayer as the key to enhance photocatalytic hydrogen generation |
(Universite Paris-Saclay) (Institut Català de Nanociència i Nanotecnologia) (Institut Català de Nanociència i Nanotecnologia) (Universite Paris-Saclay) (Universite de Lille) (Institut Català de Nanociència i Nanotecnologia) (Universite de Lille) (Universite Paris-Saclay)
| Data: | 2024 |
| Resum: | Strong metal-support interaction (SMSI) is a pivotal strategy in thermal catalysis; however, its application in photocatalysis leaves ample area for further development. A method inducing SMSI between earth-abundant metals, such as copper and TiO, at room temperature, and thus hindering the agglomeration of copper species remains rarely reported. In this work, we achieved SMSI construction of TiO overlayers on Cu nanoparticles via a straightforward soft-chemistry method. SMSI coverage is stable even after high-temperature treatment in the air (500 °C), as demonstrated by chemical mapping and surface analysis. The method is more accurate than thermal reduction since it produces a metastable, highly active anatase phase. Interestingly, the TiO overlayer induces the formation of four-coordinated copper(ii) species surrounded by oxygen atoms, resulting in coexisting CuO planes, which were monitored through high-resolution transmission electron microscopy and electron paramagnetic resonance spectroscopy. The stronger interfacial interaction by forming Ti-O-Cu bonding promotes charge carrier separation, producing twice as much H than the low interfacial interaction within a conventional photoactive system wherein copper was decorated onto TiO. Our approach offers a rational design for SMSI materials in photocatalysis, which is extendable to other catalytic reactions. |
| Ajuts: | Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00457 Agencia Estatal de Investigación PID2020-116093RB-C43 Agencia Estatal de Investigación CEX2021-001214-S Agència de Gestió d'Ajuts Universitaris i de Recerca 2020/FI-00103 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.  |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Publicat a: | Journal of materials chemistry. A, Vol. 12, Issue 30 (June 2024) , p. 19236-19246, ISSN 2050-7496 |
