Synergetic photocatalytic and thermocatalytic aqueous phase reforming of methanol for hydrogen production based on noble metal/photosensitive supports catalysts

Efficiency of thermo–photocatalytic production of hydrogen from biomolecules: a multifaceted perspective

“…Combining thermal and photonic energy into a single catalytic processes has been shown to be effective for many chemical reactions and, particularly, hydrogen production. [12][13][14][15][16][17][18][19] The simultaneous use of thermal and photonic energy within a single catalytic process can primarily depend on the way by which the energy is supplied. Thermal energy can be supplied as customarily carried out in thermal catalysts using heating suppliers or can be obtained from light and, particularly, using infrared wavenumbers.…”

“…As will be detailed here, most active thermo-photo catalytic systems correspond to photo-responsive oxide semiconductors, such as titania, ceria, zinc or indium oxides and others, promoted by metals or other co-catalysts. [12][13][14][15][16][17][18][19]25 The key role of the photo-active oxide indicates that the heat-light interaction is primarily understood considering the phenomena taking place in the oxide semiconductor. Of course, the presence of co-catalyst of different chemical nature should be also considered.…”

“…Starting from the IUPAC-defined photonic yield and quantum efficiency of a photo catalytic process, 26 the literature defines analogs for In short, in this contribution we attempt to provide an overall view of the most exciting results reported in the literature and covering the above mentioned chemical, photonic and energy-related fundamental aspects of the thermo-photo catalytic production of hydrogen from bio-molecules. The corresponding information as well as an unified view of the problem are completely absent in the literature [12][13][14][16][17][18][19] and correspond to a piece of critical significance in order to assess synergy in dual thermo-photo catalytic processes. We would like to stress the fact that the framework provided for the measuring, analysis and interpretation of the efficiency is general for any thermo-photo reaction and that the catalytic process here studied can be also viewed as a case example to generalize the results of this perspective contribution.…”

Green Thermo-Photo Catalytic Production of Syngas Using Pd/Nb–TiO2 Catalysts

“…The relatively high temperature required for operation of benchmark catalysis based in noble (Pt and Rh) and non-noble (Cu and Ni) supported on reducible oxides as well as the concomitant deactivation effects on the currently available catalysts are issues which do not allow practical implementation of the process at the present stage. ,, Alternatively, photo-based activation and transformation of the alcohol can be carried out at room temperature and pressure. However, several physico-chemical phenomena such as the significant charge recombination after illumination or a sluggish kinetics with multiple and successive steps consuming a significant number of charge carrier species limit efficiency and correspond to a major issue for technological application of photocatalysis. , Irrespective of the energy source of the methanol-based catalytic process, a combination of light and thermal energy sources can mitigate or eliminate some of the main controlling factors limiting the practical implementation of single-energy source thermal- and photo-alone processes. − As a consequence, in recent years, the thermo-photo catalytic production of hydrogen and syngas has been actively investigated. − Among tested catalytic powders, TiO 2 -based materials have been broadly used due to the well-known adequate properties of the oxide, both in the thermal and photonic alone processes. , Both noble metal ,− and non-noble metal ,− co-catalysts are customarily used for TiO 2 -based catalysts in order to boost activity. Among them, the study of Pd is scarcely investigated for the production of hydrogen, although has been already tested for volatile organic elimination using thermo-photo catalysis …”

“…14−21 Among tested catalytic powders, TiO 2 -based materials have been broadly used due to the wellknown adequate properties of the oxide, both in the thermal and photonic alone processes. 19,22 Both noble metal 20 and non-noble metal 21,26−31 co-catalysts are customarily used for TiO 2 -based catalysts in order to boost activity. Among them, the study of Pd is scarcely investigated for the production of hydrogen, although has been already tested for volatile organic elimination using thermo-photo catalysis.…”