Titania supported MOF-199 derived Cu–Cu<sub>2</sub>O nanoparticles: highly efficient non-noble metal photocatalysts for hydrogen production from alcohol–water mixtures

Majeed, Imran; Nadeem, Muhammad Arif; Badshah, Amin; Kanodarwala, Fehmida K.; Ali, Hassan; Khan, Muhammad Abdullah; Stride, John A.

doi:10.1039/c6cy02328b

Cited by 63 publications

(29 citation statements)

References 74 publications

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“…Apart from the abovementioned works, Table summarizes other recently published MOF‐derived catalysts for photocatalytic HER, including MoS 2 @TiO 2 nanohybrid, Ni 2 P/CdS composite, Cu/CuO@TiO 2 nanocomposites, yolk–shell CdS microcubes, porous CdS, Cu–Cu 2 O nanoparticles, Pd‐decorated TiO 2 , MoS 2 nanosheets, N‐doped graphitic carbon, and Co–Zn–Cd–S nanocrystals . It can also be noticed in Table that quite a few studies still require the use of Pt as the cocatalyst for prominent photocatalytic HER performance, which weakens the practicability of reported catalysts in reality.…”

Section: Mofs For Hermentioning

confidence: 99%

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Zhu

Zou

2018

Advanced Energy Materials

366

199

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society is still heavily relying on chemical fuels. Therefore, the essential and realistic approaches to environmental and energy issues remain to be the exploration of clean and sustainable energy sources, in order to meet the ever-increasing energy demand. Thanks to its high energy density and environmental friendliness, hydrogen fuel comes into play as a muchanticipated new energy carrier, which is under intensive studies in the academic field. [4] Furthermore, we are already in the new era witnessing the transformation of hydrogen-powered technologies from science fictions to realities. UK is already in the process of replacing their traditional diesel-powered double decker buses with the hydrogen-powered version, which aims to phase out the former by 2018. [5] China announced its world's first hydrogen-powered tram, which was put into business service in the latter half of 2017. [6] Mercedes-Benz had even started its development of personal hydrogen-powered car, and Toyota had commercialized its hydrogen fuel-cell car branded "Mirai." [7,8] However, one critical issue remains to be the conflict between the hydrogen production efficiency and the demand for the mass distribution of hydrogen-powered technologies.Current industrial hydrogen production methods include coal gasification (followed by water-gas shift reaction), steam reforming, cryogenic distillation, and water splitting. [9] Coal gasification and steam reforming utilize the reaction between conventional fossil fuels and water to produce syngas (primarily CO and H 2 ) or CO 2 and H 2 mixture. However, both reactions require high temperatures (can be over 1000 °C) and pressures, which is an energy intensive process and has strict requirements on infrastructures. [10] The reaction products also need to be further separated to obtain relatively high-concentration of hydrogen. Cryogenic distillation takes the advantage of difference in gas boiling points, which can be applied to separate hydrogen from other gas components in the former two hydrogen production methods. However, cryogenic distillation is also an energy intensive process for low-temperature gas liquification. In comparison, hydrogen evolution reaction (HER) through water splitting is much-favored because of the following three prominent advantages: 1) Water splitting can be carried out at room temperature and ambient pressure, which is less restricted by infrastructure requirements. 2) Oxygen and hydrogen can be produced separately or selectively, which eliminate the need for gas separation. 3) Both the hydrogen source Highly efficient hydrogen evolution reactions (HERs) will determine the mass distributions of hydrogen-powered clean technologies in the future. Metal-organic frameworks (MOFs) are emerging as a class of crystalline porous materials. Along with their derivatives, MOFs have recently been under intense study for their applications in various hydrogen production techniques. MOF-based materials possess unique advantages, such as high specific surface area, crystalline porous str...

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Section: Mofs For Hermentioning

confidence: 99%

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Zhu

Zou

2018

Advanced Energy Materials

366

199

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“…As illustrated in Figure , both 1 and 2 exhibit three continuous absorption bands centered at 271 nm, 377 nm, and 602 nm with different absorption widths and intensities. As compared with the DSR of the isolated HL ligand, the former two bands of the complexes should be assigned to the intraligand π→π* and n→π* transitions of the HL ligand, which are slightly red‐shift due to the coordination interaction between Cu II ion and organic ligand HL. The third absorption band centered at 602 nm can be attributed to the d–d spin‐allowed transitions of Cu II ion .…”

Section: Resultsmentioning

confidence: 99%

Two Bulky Conjugated 4′‐(4‐Hydroxyphenyl)‐4,2′:6′,4′′‐terpyridine‐based Layered Complexes: Synthesis, Structure, and Photocatalytic Hydrogen Evolution Activity

Zhu

Dai

Wang

et al. 2019

Zeitschrift anorg allge chemie

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Two new layered complexes with the formulas of {[Cu(H 2 O)(HL) 2 Cl](NO 3 )} n (1) and {[Cu(H 2 O) 2 (HL) 2 ](NO 3 ) 2 } n (2) were solvothermally synthesized by the reactions of the bulky conjugated 4Ј-(4-hydroxyphenyl)-4,2Ј:6Ј,4ЈЈ-terpyridine ligand (HL) with different Cu II salts, which were further used as photocatalysts to achieve hydrogen production from water splitting. Single-crystal structural analyses reveal that both complexes feature coplanar (4 4) layers

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“…Cuprous oxide is often used in conjunction with additional functional elements, such as noble metals (e.g., Pt [ 288 , 289 ], Au [ 290 ] or metal copper [ 291 , 292 , 293 , 294 ]) to prepare ternary hybrid photocatalysts. A review that includes several references and experimental results on the use of TiO 2 /Cu 2 O composites for H 2 production through photoreforming processes has been recently published by Marotta and coworkers [ 287 ].…”

Section: Present and Future Trends For Tio 2 -Bmentioning

confidence: 99%

Charge Carrier Processes and Optical Properties in TiO2 and TiO2-Based Heterojunction Photocatalysts: A Review

Lettieri

Pavone

Fioravanti³

et al. 2021

Materials

129

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Photocatalysis based technologies have a key role in addressing important challenges of the ecological transition, such as environment remediation and conversion of renewable energies. Photocatalysts can in fact be used in hydrogen (H2) production (e.g., via water splitting or photo-reforming of organic substrates), CO2 reduction, pollution mitigation and water or air remediation via oxidation (photodegradation) of pollutants. Titanium dioxide (TiO2) is a “benchmark” photocatalyst, thanks to many favorable characteristics. We here review the basic knowledge on the charge carrier processes that define the optical and photophysical properties of intrinsic TiO2. We describe the main characteristics and advantages of TiO2 as photocatalyst, followed by a summary of historical facts about its application. Next, the dynamics of photogenerated electrons and holes is reviewed, including energy levels and trapping states, charge separation and charge recombination. A section on optical absorption and optical properties follows, including a discussion on TiO2 photoluminescence and on the effect of molecular oxygen (O2) on radiative recombination. We next summarize the elementary photocatalytic processes in aqueous solution, including the photogeneration of reactive oxygen species (ROS) and the hydrogen evolution reaction. We pinpoint the TiO2 limitations and possible ways to overcome them by discussing some of the “hottest” research trends toward solar hydrogen production, which are classified in two categories: (1) approaches based on the use of engineered TiO2 without any cocatalysts. Discussed topics are highly-reduced “black TiO2”, grey and colored TiO2, surface-engineered anatase nanocrystals; (2) strategies based on heterojunction photocatalysts, where TiO2 is electronically coupled with a different material acting as cocatalyst or as sensitizer. Examples discussed include TiO2 composites or heterostructures with metals (e.g., Pt-TiO2, Au-TiO2), with other metal oxides (e.g., Cu2O, NiO, etc.), direct Z-scheme heterojunctions with g-C3N4 (graphitic carbon nitride) and dye-sensitized TiO2.

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Titania supported MOF-199 derived Cu–Cu₂O nanoparticles: highly efficient non-noble metal photocatalysts for hydrogen production from alcohol–water mixtures

Abstract: Water splitting over Cu–Cu2O/TiO2 photocatalysts.

Cited by 63 publications

References 74 publications

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Two Bulky Conjugated 4′‐(4‐Hydroxyphenyl)‐4,2′:6′,4′′‐terpyridine‐based Layered Complexes: Synthesis, Structure, and Photocatalytic Hydrogen Evolution Activity

Charge Carrier Processes and Optical Properties in TiO2 and TiO2-Based Heterojunction Photocatalysts: A Review

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Titania supported MOF-199 derived Cu–Cu2O nanoparticles: highly efficient non-noble metal photocatalysts for hydrogen production from alcohol–water mixtures

Abstract: Water splitting over Cu–Cu2O/TiO2 photocatalysts.

Cited by 63 publications

References 74 publications

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Metal–Organic Framework Based Catalysts for Hydrogen Evolution

Two Bulky Conjugated 4′‐(4‐Hydroxyphenyl)‐4,2′:6′,4′′‐terpyridine‐based Layered Complexes: Synthesis, Structure, and Photocatalytic Hydrogen Evolution Activity

Charge Carrier Processes and Optical Properties in TiO2 and TiO2-Based Heterojunction Photocatalysts: A Review

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Titania supported MOF-199 derived Cu–Cu₂O nanoparticles: highly efficient non-noble metal photocatalysts for hydrogen production from alcohol–water mixtures