Measuring and interpreting quantum efficiency for hydrogen photo-production using Pt-titania catalysts

Fontelles-Carceller, Olga; Muñoz‐Batista, Mario J.; Rodríguez‐Castellón, Enrique; Conesa, J.C.; Fernández-García, Marcos; Kubacka, Anna

doi:10.1016/j.jcat.2017.01.012

Cited by 76 publications

(64 citation statements)

References 72 publications

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“…Photocatalytic hydrogen production through water splitting or reforming of organics may be substantially affected by the following operating variables: particle size, shape, morphology, structure and crystallinity; band gap energy; co-catalyst nature and preparation method; type and concentration of sacrificial agent; pH of the solution; presence of oxygen; operating temperature [13,17,132].…”

Section: Operating Conditions Affecting Photocatalytic Hydrogen Genermentioning

confidence: 99%

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

et al. 2017

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Photocatalytic water splitting and organic reforming based on nano-sized composites are gaining increasing interest due to the possibility of generating hydrogen by employing solar energy with low environmental impact. Although great efforts in developing materials ensuring high specific photoactivity have been recently recorded in the literature survey, the solar-to-hydrogen energy conversion efficiencies are currently still far from meeting the minimum requirements for real solar applications. This review aims at reporting the most significant results recently collected in the field of hydrogen generation through photocatalytic water splitting and organic reforming, with specific focus on metal-based semiconductor nanomaterials (e.g., metal oxides, metal (oxy)nitrides and metal (oxy)sulfides) used as photocatalysts under UVA or visible light irradiation. Recent developments for improving the photoefficiency for hydrogen generation of most used metal-based composites are pointed out. The main synthesis and operating variables affecting photocatalytic water splitting and organic reforming over metal-based nanocomposites are critically evaluated.

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Section: Operating Conditions Affecting Photocatalytic Hydrogen Genermentioning

confidence: 99%

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

et al. 2017

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“…This equation takes into account that the transfer of two electrons is required to produce one H 2 molecule ,. The reaction rate can be easily calculated from experimental catalytic experiments, however, the denominator requires the solution of the radiative transfer equation (RTE) in the in‐flow photoreactor.…”

Section: Methodsmentioning

confidence: 99%

“…In this sense, the design of photocatalytic nanosystems toward the reforming of bio‐alcohols have gained a lot of interest as an efficient manner to produce hydrogen following renewable, clean‐burning and eco‐environmental protocols . Particularly, methanol is a simple molecule able to yield relatively high hydrogen production rates . In addition, the application of flow reactors to perform such photo‐reactions offered significant advantages with respect to batch reactor designs.…”

Section: Introductionmentioning

confidence: 99%

Sunlight‐Driven Hydrogen Production Using an Annular Flow Photoreactor and g‐C₃N₄‐Based Catalysts

et al. 2018

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Simple modifications of g‐C3N4 (CN) have been studied to maximize hydrogen production under sunlight irradiation conditions. The relatively low surface area CN obtained was subjected to an exfoliation process which 1) increases available catalytic area and 2) modulates the semiconductor charge photohandling. MnOx and metallic Pt, which can act as co‐catalysts, were subsequently added on the surface of exfoliated or bulk counterparts, producing an active material suitable for sunlight applications. The resulting catalysts were fully characterized using a multi‐technique approach. The combination of results indicates that optical properties are strongly defined by the delaminated process whereas the minority phases do not cause physico‐chemical variation of the CN structure. Materials without Pt did not show activity under the investigated reaction conditions. In addition, the collaborative effect of the minority phases on the exfoliated CN was confirmed through a strict quantum efficiency calculation. Stability of the most active sample was similarly examined.

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“…However, the practical application of TiO 2 is limited by some drawbacks such as the low utilization of solar energy and high charge recombination rate . Several approaches have been adopted to enhance the photocatalytic activity, including morphology and structure control, doping of metals and nonmetals, integration of other semiconductors, and loading with noble metals . Recently, coupling with ferroelectric materials to form a heterostructure has aroused much interest in the field of photocatalysis .…”

Section: Introductionmentioning

confidence: 99%

“…[29,30] Several approaches have been adopted to enhance the photocatalytic activity, including morphologya nd structure control, [31] doping of metals and nonmetals, [32,33] integration of other semiconductors, [34,35] and loading with noble metals. [36,37] Recently,coupling with ferroelectric materials to form ah eterostructure has aroused much interesti nt he field of photocatalysis. [38,39] Ferroelectric materials have internal dipolar fields that can separatep hotogenerated carriers.…”

Section: Introductionmentioning

confidence: 99%

From E‐Waste to Nb‐Pb Co‐Doped and Pd‐Loaded TiO₂/BaTiO₃ Heterostructure: Highly Efficient Photocatalytic Performance

Niu

2019

ChemSusChem

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A new and sustainable process was reported for the in situ synthesis of Nb‐Pb co‐doped and Pd‐loaded TiO2/BaTiO3 nanometer heterostructures from waste multilayer ceramic capacitors through a simple chlorination–leaching route. The particle size of the Nb‐Pb co‐doped heterostructure and the Pd loading were 20–50 nm and less than 5 nm, respectively. The bandgaps of the prepared samples were in the range 2.81–2.92 eV. The optimal simulated‐sunlight photocatalytic H2 production rate and Rhodamine B degradation rate of the prepared heterostructure could reach 576.8 μmol g−1 h−1 and 0.29911 min−1, respectively, which were approximately 11.3 and 19.1 times higher than those of commercial TiO2, and 5.96 and 8.91 times higher than those of bare TiO2/BaTiO3. The recycled heterostructure exhibited excellent photostability and reusability. Such superior photocatalytic performance of the sample was attributed to the formation of the heterostructure, the Nb‐Pb co‐doping, and the Pd loading, which enhanced the visible light absorption and charge separation efficiency. Furthermore, DFT calculations were applied to explore the enhanced mechanism. This study demonstrates a sustainable process for the conversion of e‐waste to a high‐value‐added and highefficiency photocatalyst, which has the advantages of waste utilization, low‐cost preparation, and environmental protection.

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Measuring and interpreting quantum efficiency for hydrogen photo-production using Pt-titania catalysts

Cited by 76 publications

References 72 publications

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Sunlight‐Driven Hydrogen Production Using an Annular Flow Photoreactor and g‐C₃N₄‐Based Catalysts

From E‐Waste to Nb‐Pb Co‐Doped and Pd‐Loaded TiO₂/BaTiO₃ Heterostructure: Highly Efficient Photocatalytic Performance

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Measuring and interpreting quantum efficiency for hydrogen photo-production using Pt-titania catalysts

Cited by 76 publications

References 72 publications

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Sunlight‐Driven Hydrogen Production Using an Annular Flow Photoreactor and g‐C3N4‐Based Catalysts

From E‐Waste to Nb‐Pb Co‐Doped and Pd‐Loaded TiO2/BaTiO3 Heterostructure: Highly Efficient Photocatalytic Performance

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Sunlight‐Driven Hydrogen Production Using an Annular Flow Photoreactor and g‐C₃N₄‐Based Catalysts

From E‐Waste to Nb‐Pb Co‐Doped and Pd‐Loaded TiO₂/BaTiO₃ Heterostructure: Highly Efficient Photocatalytic Performance