Pt-Nb2O5-TiO2 based semiconductors for photo-reforming of glucose and fructose aqueous solutions

Muhammad Umair; Giovanni Palmisano; Reem Al Sakkaf; Samar Al Jitan; Albin Pintar; Gregor Žerjav; Leonardo Palmisano; Vittorio Loddo; Marianna Bellardita

doi:10.1016/j.apsusc.2023.159030

Pt-Nb₂O₅-TiO₂ based semiconductors for photo-reforming of glucose and fructose aqueous solutions

Muhammad Umair, Giovanni Palmisano, Reem Al Sakkaf, Samar Al Jitan, Albin Pintar, Gregor Žerjav, Leonardo Palmisano, Vittorio Loddo, Marianna Bellardita

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The conversion of biomass derivatives into fuels and valuable compounds under green conditions is increasingly attracting the attention of the scientific community. In this study, the photo-reforming of aqueous glucose and fructose solutions in the presence of 0.5 wt% Pt-loaded homemade bare and Nb₂O₅-TiO₂ catalysts was investigated to maximize the activity of titania for both hydrogen production and valuable chemical production. The most efficient sample was the home-prepared Pt-4 %Nb₂O₅-HP, for both glucose and fructose conversion, with the highest H₂ productivity and the highest selectivity towards partially oxidized compounds. The behaviour of the Pt-4 %Nb₂O₅-HP derives from a favourable compromise of some surface and intrinsic electronic properties as, for instance, photoluminescence, zeta potential and surface acidity. The presence of Nb₂O₅ decreased the recombination rate of photoproduced charges. Photo-deposition of Pt was essential for H₂ production and, surprisingly, also increased the basicity of the TiO₂ surface; an increase in surface acidity was measured when only niobium oxide was added, whereas stronger basic sites were observed in the simultaneous presence of Pt and niobium oxide.

Original language	British English
Article number	159030
Journal	Applied Surface Science
Volume	648
DOIs	https://doi.org/10.1016/j.apsusc.2023.159030
State	Published - 1 Mar 2024

Keywords

H production
NbO-TiO catalysts
Photocatalysis
Selective biomass conversion

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.apsusc.2023.159030

Cite this

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title = "Pt-Nb2O5-TiO2 based semiconductors for photo-reforming of glucose and fructose aqueous solutions",

abstract = "The conversion of biomass derivatives into fuels and valuable compounds under green conditions is increasingly attracting the attention of the scientific community. In this study, the photo-reforming of aqueous glucose and fructose solutions in the presence of 0.5 wt% Pt-loaded homemade bare and Nb2O5-TiO2 catalysts was investigated to maximize the activity of titania for both hydrogen production and valuable chemical production. The most efficient sample was the home-prepared Pt-4 %Nb2O5-HP, for both glucose and fructose conversion, with the highest H2 productivity and the highest selectivity towards partially oxidized compounds. The behaviour of the Pt-4 %Nb2O5-HP derives from a favourable compromise of some surface and intrinsic electronic properties as, for instance, photoluminescence, zeta potential and surface acidity. The presence of Nb2O5 decreased the recombination rate of photoproduced charges. Photo-deposition of Pt was essential for H2 production and, surprisingly, also increased the basicity of the TiO2 surface; an increase in surface acidity was measured when only niobium oxide was added, whereas stronger basic sites were observed in the simultaneous presence of Pt and niobium oxide.",

keywords = "H production, NbO-TiO catalysts, Photocatalysis, Selective biomass conversion",

author = "Muhammad Umair and Giovanni Palmisano and {Al Sakkaf}, Reem and {Al Jitan}, Samar and Albin Pintar and Gregor {\v Z}erjav and Leonardo Palmisano and Vittorio Loddo and Marianna Bellardita",

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year = "2024",

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doi = "10.1016/j.apsusc.2023.159030",

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T1 - Pt-Nb2O5-TiO2 based semiconductors for photo-reforming of glucose and fructose aqueous solutions

AU - Umair, Muhammad

AU - Palmisano, Giovanni

AU - Al Sakkaf, Reem

AU - Al Jitan, Samar

AU - Pintar, Albin

AU - Žerjav, Gregor

AU - Palmisano, Leonardo

AU - Loddo, Vittorio

AU - Bellardita, Marianna

PY - 2024/3/1

Y1 - 2024/3/1

N2 - The conversion of biomass derivatives into fuels and valuable compounds under green conditions is increasingly attracting the attention of the scientific community. In this study, the photo-reforming of aqueous glucose and fructose solutions in the presence of 0.5 wt% Pt-loaded homemade bare and Nb2O5-TiO2 catalysts was investigated to maximize the activity of titania for both hydrogen production and valuable chemical production. The most efficient sample was the home-prepared Pt-4 %Nb2O5-HP, for both glucose and fructose conversion, with the highest H2 productivity and the highest selectivity towards partially oxidized compounds. The behaviour of the Pt-4 %Nb2O5-HP derives from a favourable compromise of some surface and intrinsic electronic properties as, for instance, photoluminescence, zeta potential and surface acidity. The presence of Nb2O5 decreased the recombination rate of photoproduced charges. Photo-deposition of Pt was essential for H2 production and, surprisingly, also increased the basicity of the TiO2 surface; an increase in surface acidity was measured when only niobium oxide was added, whereas stronger basic sites were observed in the simultaneous presence of Pt and niobium oxide.

AB - The conversion of biomass derivatives into fuels and valuable compounds under green conditions is increasingly attracting the attention of the scientific community. In this study, the photo-reforming of aqueous glucose and fructose solutions in the presence of 0.5 wt% Pt-loaded homemade bare and Nb2O5-TiO2 catalysts was investigated to maximize the activity of titania for both hydrogen production and valuable chemical production. The most efficient sample was the home-prepared Pt-4 %Nb2O5-HP, for both glucose and fructose conversion, with the highest H2 productivity and the highest selectivity towards partially oxidized compounds. The behaviour of the Pt-4 %Nb2O5-HP derives from a favourable compromise of some surface and intrinsic electronic properties as, for instance, photoluminescence, zeta potential and surface acidity. The presence of Nb2O5 decreased the recombination rate of photoproduced charges. Photo-deposition of Pt was essential for H2 production and, surprisingly, also increased the basicity of the TiO2 surface; an increase in surface acidity was measured when only niobium oxide was added, whereas stronger basic sites were observed in the simultaneous presence of Pt and niobium oxide.

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KW - NbO-TiO catalysts

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