Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water Solution
The study compares the photocatalytic behavior of TiO<sub>2</sub>, NiO-TiO<sub>2</sub>, and Ni-NiO-TiO<sub>2</sub> photocatalysts in photocatalytic hydrogen production from methanol–water solution. TiO<sub>2</sub> and NiO-TiO<sub>2</sub> ph...
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MDPI AG
2023-01-01
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| Online Access: | https://www.mdpi.com/2073-4344/13/2/293 |
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| author | Helena Drobná Vendula Meinhardová Lada Dubnová Kateřina Kozumplíková Martin Reli Kamila Kočí Libor Čapek |
| author_facet | Helena Drobná Vendula Meinhardová Lada Dubnová Kateřina Kozumplíková Martin Reli Kamila Kočí Libor Čapek |
| author_sort | Helena Drobná |
| collection | DOAJ |
| description | The study compares the photocatalytic behavior of TiO<sub>2</sub>, NiO-TiO<sub>2</sub>, and Ni-NiO-TiO<sub>2</sub> photocatalysts in photocatalytic hydrogen production from methanol–water solution. TiO<sub>2</sub> and NiO-TiO<sub>2</sub> photocatalysts with theoretical NiO loading of 0.5, 1.0, and 3.0 wt. % of NiO were prepared by the sol–gel method. The Ni-NiO-TiO<sub>2</sub> photocatalysts were prepared by partial reduction of NiO-TiO<sub>2</sub> in hydrogen at 450 °C. The Ni-NiO-TiO<sub>2</sub> photocatalysts showed significantly higher hydrogen production than the NiO-TiO<sub>2</sub> photocatalysts. The structural, textural, redox, and optical properties of all of the prepared photocatalysts were studied by using XRD, SEM, N<sub>2</sub>- adsorption, XPS, H<sub>2</sub>-TPR, and DRS. Attention is focused on the contribution of Ni loading, the surface composition (Ni<sup>2+</sup>, the lattice O<sup>2−</sup> species, and OH groups), the distribution of Ni species (dispersed NiO species, crystalline NiO phase, and the metallic Ni<sup>0</sup> species), oxygen vacancies, TiO<sub>2</sub> modification, the TiO<sub>2</sub> crystallite size, and the specific surface area. |
| first_indexed | 2024-03-11T09:01:46Z |
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| language | English |
| last_indexed | 2024-03-11T09:01:46Z |
| publishDate | 2023-01-01 |
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| series | Catalysts |
| spelling | doaj.art-3f37d24bb029498dbd5b8ac91e5e3bf92023-11-16T19:41:06ZengMDPI AGCatalysts2073-43442023-01-0113229310.3390/catal13020293Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water SolutionHelena Drobná0Vendula Meinhardová1Lada Dubnová2Kateřina Kozumplíková3Martin Reli4Kamila Kočí5Libor Čapek6Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech RepublicDepartment of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech RepublicDepartment of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech RepublicDepartment of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech RepublicInstitute of Environmental Technology, CEET, VŠB-Technical University of Ostrava, 17. Listopadu 2172/15, 70800 Ostrava, Czech RepublicInstitute of Environmental Technology, CEET, VŠB-Technical University of Ostrava, 17. Listopadu 2172/15, 70800 Ostrava, Czech RepublicDepartment of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech RepublicThe study compares the photocatalytic behavior of TiO<sub>2</sub>, NiO-TiO<sub>2</sub>, and Ni-NiO-TiO<sub>2</sub> photocatalysts in photocatalytic hydrogen production from methanol–water solution. TiO<sub>2</sub> and NiO-TiO<sub>2</sub> photocatalysts with theoretical NiO loading of 0.5, 1.0, and 3.0 wt. % of NiO were prepared by the sol–gel method. The Ni-NiO-TiO<sub>2</sub> photocatalysts were prepared by partial reduction of NiO-TiO<sub>2</sub> in hydrogen at 450 °C. The Ni-NiO-TiO<sub>2</sub> photocatalysts showed significantly higher hydrogen production than the NiO-TiO<sub>2</sub> photocatalysts. The structural, textural, redox, and optical properties of all of the prepared photocatalysts were studied by using XRD, SEM, N<sub>2</sub>- adsorption, XPS, H<sub>2</sub>-TPR, and DRS. Attention is focused on the contribution of Ni loading, the surface composition (Ni<sup>2+</sup>, the lattice O<sup>2−</sup> species, and OH groups), the distribution of Ni species (dispersed NiO species, crystalline NiO phase, and the metallic Ni<sup>0</sup> species), oxygen vacancies, TiO<sub>2</sub> modification, the TiO<sub>2</sub> crystallite size, and the specific surface area.https://www.mdpi.com/2073-4344/13/2/293Ni-NiO-TiO<sub>2</sub>water splittingNi-NiO co-effect |
| spellingShingle | Helena Drobná Vendula Meinhardová Lada Dubnová Kateřina Kozumplíková Martin Reli Kamila Kočí Libor Čapek Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water Solution Catalysts Ni-NiO-TiO<sub>2</sub> water splitting Ni-NiO co-effect |
| title | Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water Solution |
| title_full | Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water Solution |
| title_fullStr | Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water Solution |
| title_full_unstemmed | Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water Solution |
| title_short | Partially Reduced Ni-NiO-TiO<sub>2</sub> Photocatalysts for Hydrogen Production from Methanol–Water Solution |
| title_sort | partially reduced ni nio tio sub 2 sub photocatalysts for hydrogen production from methanol water solution |
| topic | Ni-NiO-TiO<sub>2</sub> water splitting Ni-NiO co-effect |
| url | https://www.mdpi.com/2073-4344/13/2/293 |
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