Study of PtOx/TiO2 Photocatalysts in the Photocatalytic Reforming of Glycerol: The Role of Co-Catalyst Formation
Katalin Majrik,Zoltán Pászti,László Korecz,László Trif,Attila Domján,Giuseppe Bonura,Catia Cannilla,Francesco Frusteri,András Tompos,Emília Tálas +9 more
TLDR
Platinum was more easily reducible in all of the P25 supported samples compared to those obtained from the more water-retentive homemade TiO2 and the highest H2 evolution rate was observed over P25 based samples and the H2 treatment resulted in more active samples than the other co-catalyst formation methods.Abstract:
In this study, relationships between preparation conditions, structure, and activity of Pt-containing TiO₂ photocatalysts in photoinduced reforming of glycerol for H₂ production were explored. Commercial Aerolyst® TiO₂ (P25) and homemade TiO₂ prepared by precipitation-aging method were used as semiconductors. Pt co-catalysts were prepared by incipient wetness impregnation from aqueous solution of Pt(NH₃)₄(NO₃)₂ and activated by calcination, high temperature hydrogen, or nitrogen treatments. The chemico-physical and structural properties were evaluated by XRD, ¹H MAS NMR, ESR, XPS, TG-MS and TEM. The highest H₂ evolution rate was observed over P25 based samples and the H₂ treatment resulted in more active samples than the other co-catalyst formation methods. In all calcined samples, reduction of Pt occurred during the photocatalytic reaction. Platinum was more easily reducible in all of the P25 supported samples compared to those obtained from the more water-retentive homemade TiO₂. This result was related to the negative effect of the adsorbed water content of the homemade TiO₂ on Pt reduction and on particle growth during co-catalyst formation.read more
Citations
More filters
Journal ArticleDOI
Effect of Metal Work Function on Hydrogen Production from Photocatalytic Water Splitting with MTiO2 Catalysts
Charles Beasley,Muthu Kumaran Gnanamani,Eduardo Santillan-Jimenez,Michela Martinelli,Wilson D. Shafer,Shelley D. Hopps,Namal Wanninayake,Doo Young Kim +7 more
Journal ArticleDOI
Photocatalytic Hydrogen Evolution Using Bi-Metallic (Ni/Pt) Na2Ti3O7 Whiskers: Effect of the Deposition Order
Luis F. Garay-Rodríguez,Sebastián Murcia-López,Teresa Andreu,Edgar Moctezuma,Leticia M. Torres-Martínez,Joan Ramon Morante +5 more
TL;DR: In this paper, photodeposition of Pt increased the H2 production by more than one order of magnitude, and the combination of both co-catalysts (Ni and Pt) gave a superior performance in terms of H2 synthesis.
Journal ArticleDOI
Current Developments and Future Trends in Photocatalytic Glycerol Valorization: Photocatalyst Development
TL;DR: Glycerol is a significant byproduct of biomass conversion into biodiesel, and numerous studies have been focused on its valorization technologies in recent years as mentioned in this paper, including photocatalytic glycerol valorizati...
Journal ArticleDOI
Metallic Pt and PtO2 Dual-Cocatalyst-Loaded Binary Composite RGO-CNx for the Photocatalytic Production of Hydrogen and Hydrogen Peroxide
TL;DR: In this article, photocatalytic overall water splitting is considered as an ideal solution to the energy crisis by converting inexhaustible solar energy into hydrogen energy, but the practical application of p...
References
More filters
Journal ArticleDOI
Photocatalysis on TiO2 Surfaces - Principles, Mechanisms, and Selected Results
TL;DR: In this article, the authors focus on interfacial processes and summarize some of the operating principles of heterogeneous photocatalysis systems, including the electron transfer and energy transfer processes in photocatalytic reactions.
Journal ArticleDOI
Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications
Xiaobo Chen,Samuel S. Mao +1 more
Journal ArticleDOI
TiO2 photocatalysis and related surface phenomena
TL;DR: The field of photocatalysis can be traced back more than 80 years to early observations of the chalking of titania-based paints and to studies of the darkening of metal oxides in contact with organic compounds in sunlight as discussed by the authors.
Journal ArticleDOI
A review and recent developments in photocatalytic water-splitting using TiO2 for hydrogen production
TL;DR: In this article, the up-to-date development of the above-mentioned technologies applied to TiO 2 photocatalytic hydrogen production is reviewed, based on the studies reported in the literature, metal ion-implantation and dye sensitization are very effective methods to extend the activating spectrum to the visible range.
Journal ArticleDOI
An overview of semiconductor photocatalysis
Andrew Mills,Stephen Le Hunte +1 more
TL;DR: An overview of the field of semiconductor photocatalysis can be found in this paper, where a brief examination of its roots, achievements and possible future is presented, and the semiconductor titanium dioxide (TiO 2 ) features predominantly in past and present work.