Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants

Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants

In this contribution, four different commercial TiO<sub>2</sub> catalysts (P25, P90, PC105, and PC500) were screened for the photocatalytic production of hydrogen using ethanol as the sacrificial agent. The physico-chemical properties of the TiO<sub>2</sub> powders were chara...

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Main Authors: Michael Schwarze, Charly Klingbeil, Ha Uyen Do, Edith Mawunya Kutorglo, Riny Yolandha Parapat, Minoo Tasbihi
Format: Article
Language:English
Published: MDPI AG 2021-08-01
Series:Catalysts
Subjects:
commercial titania
green reductant
Pt nanoparticles
hydrogen production
co-catalyst
Online Access:https://www.mdpi.com/2073-4344/11/9/1027
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spelling doaj-3f506685c069421b931fa8957aff43f02021-09-25T23:51:01ZengMDPI AGCatalysts2073-43442021-08-01111027102710.3390/catal11091027Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green ReductantsMichael Schwarze0Charly Klingbeil1Ha Uyen Do2Edith Mawunya Kutorglo3Riny Yolandha Parapat4Minoo Tasbihi5Department of Chemistry, Technische Universität Berlin, Straße des 17, Juni 124, 10623 Berlin, GermanyDepartment of Chemistry, Technische Universität Berlin, Straße des 17, Juni 124, 10623 Berlin, GermanyDepartment of Chemistry, Technische Universität Berlin, Straße des 17, Juni 124, 10623 Berlin, GermanyDepartment of Chemistry, Technische Universität Berlin, Straße des 17, Juni 124, 10623 Berlin, GermanyDepartment of Chemistry, Technische Universität Berlin, Straße des 17, Juni 124, 10623 Berlin, GermanyDepartment of Chemistry, Technische Universität Berlin, Straße des 17, Juni 124, 10623 Berlin, GermanyIn this contribution, four different commercial TiO<sub>2</sub> catalysts (P25, P90, PC105, and PC500) were screened for the photocatalytic production of hydrogen using ethanol as the sacrificial agent. The physico-chemical properties of the TiO<sub>2</sub> powders were characterized by using different methods. The photocatalysts mainly vary in the ratio of anatase and rutile phases, and in the surface area. It was found that the photocatalytic activity is governed by the surface area of the photocatalyst. Pure TiO<sub>2,PC500</sub> showed the best performance, and in comparison to P25, the activity was more than twenty times higher due to its high surface area of about 270 m<sup>2</sup> g<sup>−1</sup>. For further improvement of the photocatalytic activity, platinum nanoparticles (PtNPs) were immobilized onto TiO<sub>2,PC500</sub> using two methods: a colloidal approach and a photodeposition method. For the reduction of the platinum salt precursor in the colloidal approach, different green reducing agents were used in comparison to ascorbic acid. The obtained platinum nanoparticles using natural reductants showed a higher photocatalytic activity due to the formation of smaller nanoparticles, as proven by transmission electron microscopy (TEM). The highest activity was obtained when mangosteen was used as the green reducing agent. Compared to ascorbic acid as a classical reducing agent, the photocatalytic activity of the Pt@TiO<sub>2,PC500</sub> prepared with mangosteen was about 2–3 times higher in comparison to other as-prepared photocatalysts. The Pt@TiO<sub>2,PC500</sub> catalyst was further studied under different operating conditions, such as catalyst and sacrificial agent concentration.https://www.mdpi.com/2073-4344/11/9/1027commercial titaniagreen reductantPt nanoparticleshydrogen productionco-catalyst
collection DOAJ
language English
format Article
sources DOAJ
author Michael Schwarze
Charly Klingbeil
Ha Uyen Do
Edith Mawunya Kutorglo
Riny Yolandha Parapat
Minoo Tasbihi
spellingShingle Michael Schwarze
Charly Klingbeil
Ha Uyen Do
Edith Mawunya Kutorglo
Riny Yolandha Parapat
Minoo Tasbihi
Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants
Catalysts
commercial titania
green reductant
Pt nanoparticles
hydrogen production
co-catalyst
author_facet Michael Schwarze
Charly Klingbeil
Ha Uyen Do
Edith Mawunya Kutorglo
Riny Yolandha Parapat
Minoo Tasbihi
author_sort Michael Schwarze
title Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants
title_short Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants
title_full Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants
title_fullStr Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants
title_full_unstemmed Highly Active TiO<sub>2</sub> Photocatalysts for Hydrogen Production through a Combination of Commercial TiO<sub>2</sub> Material Selection and Platinum Co-Catalyst Deposition Using a Colloidal Approach with Green Reductants
title_sort highly active tio<sub>2</sub> photocatalysts for hydrogen production through a combination of commercial tio<sub>2</sub> material selection and platinum co-catalyst deposition using a colloidal approach with green reductants
publisher MDPI AG
series Catalysts
issn 2073-4344
publishDate 2021-08-01
description In this contribution, four different commercial TiO<sub>2</sub> catalysts (P25, P90, PC105, and PC500) were screened for the photocatalytic production of hydrogen using ethanol as the sacrificial agent. The physico-chemical properties of the TiO<sub>2</sub> powders were characterized by using different methods. The photocatalysts mainly vary in the ratio of anatase and rutile phases, and in the surface area. It was found that the photocatalytic activity is governed by the surface area of the photocatalyst. Pure TiO<sub>2,PC500</sub> showed the best performance, and in comparison to P25, the activity was more than twenty times higher due to its high surface area of about 270 m<sup>2</sup> g<sup>−1</sup>. For further improvement of the photocatalytic activity, platinum nanoparticles (PtNPs) were immobilized onto TiO<sub>2,PC500</sub> using two methods: a colloidal approach and a photodeposition method. For the reduction of the platinum salt precursor in the colloidal approach, different green reducing agents were used in comparison to ascorbic acid. The obtained platinum nanoparticles using natural reductants showed a higher photocatalytic activity due to the formation of smaller nanoparticles, as proven by transmission electron microscopy (TEM). The highest activity was obtained when mangosteen was used as the green reducing agent. Compared to ascorbic acid as a classical reducing agent, the photocatalytic activity of the Pt@TiO<sub>2,PC500</sub> prepared with mangosteen was about 2–3 times higher in comparison to other as-prepared photocatalysts. The Pt@TiO<sub>2,PC500</sub> catalyst was further studied under different operating conditions, such as catalyst and sacrificial agent concentration.
topic commercial titania
green reductant
Pt nanoparticles
hydrogen production
co-catalyst
url https://www.mdpi.com/2073-4344/11/9/1027
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AT charlyklingbeil highlyactivetiosub2subphotocatalystsforhydrogenproductionthroughacombinationofcommercialtiosub2submaterialselectionandplatinumcocatalystdepositionusingacolloidalapproachwithgreenreductants
AT hauyendo highlyactivetiosub2subphotocatalystsforhydrogenproductionthroughacombinationofcommercialtiosub2submaterialselectionandplatinumcocatalystdepositionusingacolloidalapproachwithgreenreductants
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