MoS<sub>2</sub>/TiO<sub>2</sub> heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution

Guo, Limin; Yang, Zhenzhong; Marcus, Kyle; Zhao, Li; Luo, Bing; Zhou, Le; Wang, Xiaohui; Du, Yingge; Yang, Yang

doi:10.1039/c7ee02464a

Cited by 346 publications

(194 citation statements)

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“…Upon the addition of H 2 O 2 , the Au m nanoparticles were further grown on nanosheets to tune the size in a range of 5-30 nm (Figure 8e). [129] The resulting MoS 2 @TiO 2 architecture in hierarchical configuration exhibited a full-solar-spectrum absorption and excellent photocatalytic ability for hydrogen evolution, profiting from the improved charge-carrier separation by synergistic plasmonic effect and enhanced conductivity of "hot" electrons in the highly ordered architecture (Figure 9e). Recently, ultrafine TiO 2 nanoparticles were anchored on few layered MoS 2 nanosheets by hydrolyzing tetrabutyl titanate on MoS 2 nanosheets and further calcining at high temperature, which promoted the accessibility of electrolyte to 2D interlayer space and thus exhibited a remarkably improved lithium storage capacity.…”

Section: Surface Hybridization With Other Nanostructuresmentioning

confidence: 99%

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Functionalized Hybridization of 2D Nanomaterials

Guan

Han

2019

Advanced Science

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The discovery of graphene and subsequent verification of its unique properties have aroused great research interest to exploit diversified graphene‐analogous 2D nanomaterials with fascinating physicochemical properties. Through either physical or chemical doping, linkage, adsorption, and hybridization with other functional species into or onto them, more novel/improved properties are readily created to extend/expand their functionalities and further achieve great performance. Here, various functionalized hybridizations by using different types of 2D nanomaterials are overviewed systematically with emphasis on their interaction formats (e.g., in‐plane or inter plane), synergistic properties, and enhanced applications. As the most intensely investigated 2D materials in the post‐graphene era, transition metal dichalcogenide nanosheets are comprehensively investigated through their element doping, physical/chemical functionalization, and nanohybridization. Meanwhile, representative hybrids with more types of nanosheets are also presented to understand their unique surface structures and address the special requirements for better applications. More excitingly, the van der Waals heterostructures of diverse 2D materials are specifically summarized to add more functionality or flexibility into 2D material systems. Finally, the current research status and faced challenges are discussed properly and several perspectives are elaborately given to accelerate the rational fabrication of varied and talented 2D hybrids.

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Section: Surface Hybridization With Other Nanostructuresmentioning

confidence: 99%

“…Reproduced with permission [129]. a) Schematic illustration for the fabrication process of MoS 2 @TiO 2 heterostructures.…”

mentioning

confidence: 99%

Functionalized Hybridization of 2D Nanomaterials

Guan

Han

2019

Advanced Science

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“…[1][2][3][4][5] Water splitting using sunlight, based on the aforementioned technologies provides an appealing approach to convert and store abundant yet intermittent solar energy into storable, Over the past decades, diverse technologies such as photovoltaics, photosynthesis, and photothermal conversion have been developed.…”

Section: Electrocatalysismentioning

confidence: 99%

“…[15,16] Still, further efficiency improvement can be expected since the overall efficiency of electrochemical splitting of water is hindered by the inherent thermodynamics and sluggish kinetics, including high overpotential, low current density, and moderate energetic efficiency. [1][2][3][4][5] Water splitting using sunlight, based on the aforementioned technologies provides an appealing approach to convert and store abundant yet intermittent solar energy into storable, [23][24][25][26][27][28] Rationally, capitalizing the full potential of solar energy, beyond the limitation of UV light excitation, that are not absorbed by photo catalyst or photovoltaic cells for water splitting will undoubtedly augment the efficiency to further accelerate technological deployment.…”

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confidence: 99%

A Hybrid Solar Absorber–Electrocatalytic N‐Doped Carbon/Alloy/Semiconductor Electrode for Localized Photothermic Electrocatalysis

et al. 2019

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and transportable renewable hydrogen fuel and valuable chemical feedstock. In view of this notion, photochemical, photoelectrochemical, and photovoltaic-driven electrochemical catalytic hydrogen and oxygen evolution are extensively studied. [6][7][8][9][10] Though photocatalysis involves direct conversion, it suffers from low solar energy absorption and conversion efficiency, the use of sacrificial agents, slow reaction rate, and instability. [11][12][13][14] To overcome these obstacles, photoelectrochemical strategy is explored as it holds the promise of a more efficient means. [14] Even that, it is hampered by the adversaries of semiconductor catalysts selection, photoelectrode preparation, limited spectral absorption, unsatisfactory reactivity and solar conversion efficiency. [13] Then, a roundabout way of photovoltaic-driven electrochemical water splitting via alkaline water electrolyzers was considered. [10,15] The technology can achieve a solar conversion efficiency over 15%, which is highly competitive, let alone the benefits of program controllability, sustainable productivity, and system upgradability with cheaper and more efficient photovoltaic cells. [15,16] Still, further efficiency improvement can be expected since the overall efficiency of electrochemical splitting of water is hindered by the inherent thermodynamics and sluggish kinetics, including high overpotential, low current density, and moderate energetic efficiency. [17][18][19][20][21][22] Despite immense efforts in designing various composition and structure to optimize the intrinsic activity of catalysts, the progress remains insufficient.Recently, supplementing thermal energy to perform catalytic conversion and vaporize water to surpass the conventional performances is attracting more attention. [23][24][25][26][27][28] Rationally, capitalizing the full potential of solar energy, beyond the limitation of UV light excitation, that are not absorbed by photo catalyst or photovoltaic cells for water splitting will undoubtedly augment the efficiency to further accelerate technological deployment. Hence the introduction of photothermal energy to electrochemical reaction can be a feasible pathway to facilitate enhanced solar energy conversion to chemical fuels. However, the biggest challenge lies in the discordant solar absorber electrode and electrolytic cell design. Typically, the catalyst is constructed in a form of film electrode, infiltrated Converting and storing intermittent solar energy into stable chemical fuels of high efficiency depend crucially on harvesting excess energy beyond the conventional ultraviolet light spectrum. The means of applying highly efficient solar-thermal conversion on practical electricity-driven water splitting could be a significant stride toward this goal, while some bottlenecks remain unresolved. Herein, photothermic electrocatalytic oxygen and hydrogen evolution reactions are proposed, which bestow a distinctive exothermic activation and electrochemical reactivity in a reconstructed electrolyzer system, and ...

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“…Exploring renewable and clean energy to overcome the pollution of fossil fuel combustion has been a considerable challenge in recent years . Photoelectrochemical (PEC) water splitting, as a one of the most promising strategy for exploitation and utilization of new energy, can achieve solar‐to‐chemical energy conversion to effectively alleviate energy shortage .…”

Section: Introductionmentioning

confidence: 99%

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO₂ Photoanode

Cui

Bai

et al. 2019

Energy Tech

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Kinetics play a critical role in the photoelectrochemical (PEC) system, whereas co‐catalysis is mainly responsible for reducing the reaction barrier and facilitates water splitting. Here, the unsaturated Fe sites through the metal‐organic framework (MOFs) structure promote the kinetics of water oxidation over TiO2 are successfully in situ decorated. This heterostructure further helps us to better understand the PEC behaviors of organic–inorganic hybrid systems. MIL‐100(Fe), as the typical MOFs model, is facilely achieved by an FeOOH sacrificial template method, a strategy which could anchor the compact and ultrathin MIL‐100(Fe) films on the surface of TiO2 to obtain abundant unsaturated Fe sites. The photocurrent density of MIL‐100(Fe)/TiO2 reaches about 2.4 times at 1.23 V vs reversible hydrogen electrode (RHE) compared with bare TiO2, and the incident photon to current conversion efficiency value increases up to 47% (at 390 nm). Furthermore, the photocurrent density of MIL‐100(Fe)/TiO2 is maintained at 84% after 3 h, showing that the organic component of MIL‐100(Fe) takes a nature of favorable stability. The configuration of MIL‐100(Fe)/TiO2 will bring a new insight for learning the basic function of unsaturated metal sites in the PEC system.

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MoS₂/TiO₂ heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution

Abstract: Periodically patterned MoS2/TiO2 heterostructures were rationally designed as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution.

Cited by 346 publications

References 35 publications

Functionalized Hybridization of 2D Nanomaterials

Functionalized Hybridization of 2D Nanomaterials

A Hybrid Solar Absorber–Electrocatalytic N‐Doped Carbon/Alloy/Semiconductor Electrode for Localized Photothermic Electrocatalysis

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO₂ Photoanode

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MoS2/TiO2 heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution

Abstract: Periodically patterned MoS2/TiO2 heterostructures were rationally designed as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution.

Cited by 346 publications

References 35 publications

Functionalized Hybridization of 2D Nanomaterials

Functionalized Hybridization of 2D Nanomaterials

A Hybrid Solar Absorber–Electrocatalytic N‐Doped Carbon/Alloy/Semiconductor Electrode for Localized Photothermic Electrocatalysis

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO2 Photoanode

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MoS₂/TiO₂ heterostructures as nonmetal plasmonic photocatalysts for highly efficient hydrogen evolution

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO₂ Photoanode