Journal Article10.1126/SCIENCE.1215868
A Molecular MoS2 Edge Site Mimic for Catalytic Hydrogen Generation
Hemamala I. Karunadasa,Hemamala I. Karunadasa,Elizabeth Montalvo,Yujie Sun,Yujie Sun,Marcin Majda,Jeffrey R. Long,Jeffrey R. Long,Christopher J. Chang,Christopher J. Chang +9 more
TL;DR: A molecule is reported that mimics the structure of the proposed triangular active edge site fragments of molybdenum disulfide (MoS2), a widely used industrial catalyst that has shown promise as a low-cost alternative to platinum for electrocatalytic hydrogen production.
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Abstract: Inorganic solids are an important class of catalysts that often derive their activity from sparse active sites that are structurally distinct from the inactive bulk. Rationally optimizing activity is therefore beholden to the challenges in studying these active sites in molecular detail. Here, we report a molecule that mimics the structure of the proposed triangular active edge site fragments of molybdenum disulfide (MoS(2)), a widely used industrial catalyst that has shown promise as a low-cost alternative to platinum for electrocatalytic hydrogen production. By leveraging the robust coordination environment of a pentapyridyl ligand, we synthesized and structurally characterized a well-defined Mo(IV)-disulfide complex that, upon electrochemical reduction, can catalytically generate hydrogen from acidic organic media as well as from acidic water.
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Citations
Enhanced Photocatalytic Activity of WS 2 Film by Laser Drilling to Produce Porous WS 2 /WO 3 Heterostructure
Sainan Ma,Longlui Zeng,Lili Tao,Chun Yin Tang,Huiyu Yuan,Hui Long,Ping Kwong Cheng,Yang Chai,Chuansheng Chen,Kin Hung Fung,Xuming Zhang,Shu Ping Lau,Yuen Hong Tsang +12 more
TL;DR: The unprecedented combinational roles of laser drilling revealed in this study in regards to geometric tailoring, chemical transformation, and heterojunction positioning for WS2-based composite nanomaterials create a foundation for further enhancing the performance of other 2D transition metal dichalcogenides in photocatalysis via laser treatment.
Tri- and tetranuclear molybdenum and tungsten chalcogenide clusters: on the way to new materials and catalysts
TL;DR: In this article, data on the electronic structure and redox, magnetic, luminescent, nonlinear optical and catalytic properties of tri-and tetranuclear molybdenum and tungsten chalcogenide clusters are analyzed and integrated.
Van der Waals epitaxial growth of MoS2 on SiO2/Si by chemical vapor deposition
Yingchun Cheng,Ke Xin Yao,Yang Yang,Liang Li,Yingbang Yao,Qingxiao Wang,Xixiang Zhang,Yu Han,Udo Schwingenschlögl +8 more
TL;DR: In this paper, the van der Waals epitaxial growth of single layer and tetrahedral disulfide structures has been investigated and it has been shown that both single layers and tetralayer disulfides are deposited directly on the SiO2/Si substrate by chemical vapor deposition.
41
Strain and pH facilitated artificial photosynthesis in monolayer MoS2 nanosheets
TL;DR: In this article, the effect of shear strain on the concerted interplay of all the factors controlling the photocatalytic ability, such as suitable band edges straddling the redox potentials for CO2 reduction with the water and oxygen evolution reactions, optical absorbance and conductivity, carrier mobilities, carrier mobility ratios, and exciton binding energies, have been comprehensively studied on monolayer MoS2 nanosheets and calibrated, using density functional theory, to ascertain the type and magnitude of strain under which the optical absorbances and conductivities,
41
An ultrafast carbon nanotube terahertz polarisation modulator
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TL;DR: In this paper, the authors demonstrate ultrafast modulation of terahertz radiation by unaligned optically pumped single-walled carbon nanotubes, which can be tuned to achieve sub-picosecond modulation of radiation.
References
Identification of active edge sites for electrochemical H2 evolution from MoS2 nanocatalysts.
Thomas F. Jaramillo,Kristina Pilt Jørgensen,Jacob Lindner Bonde,Jane Hvolbæk Nielsen,Sebastian Horch,Ib Chorkendorff +5 more
TL;DR: The active site for hydrogen evolution, a reaction catalyzed by precious metals, on nanoparticulate molybdenum disulfide (MoS2) is determined by atomically resolving the surface of this catalyst before measuring electrochemical activity in solution.
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MoS2 Nanoparticles Grown on Graphene: An Advanced Catalyst for the Hydrogen Evolution Reaction
TL;DR: In this article, a selective solvothermal synthesis of MoS2 nanoparticles on reduced graphene oxide (RGO) sheets suspended in solution was developed, which exhibited superior electrocatalytic activity in the hydrogen evolution reaction (HER).
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Biomimetic Hydrogen Evolution: MoS2 Nanoparticles as Catalyst for Hydrogen Evolution
Berit Hinnemann,Poul Georg Moses,Jacob Lindner Bonde,Kristina Pilt Jørgensen,Jane Hvolbæk Nielsen,Sebastian Horch,Ib Chorkendorff,Jens K. Nørskov +7 more
TL;DR: The ability of different metal surfaces and of the enzymes nitrogenase and hydrogenase to catalyze the hydrogen evolution reaction is analyzed and a necessary criterion for high catalytic activity is found: that the binding free energy of atomic hydrogen to the catalyst is close to zero.
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•Posted Content
MoS2 Nanoparticles Grown on Graphene: An Advanced Catalyst for Hydrogen Evolution Reaction
TL;DR: A selective solvothermal synthesis of MoS(2) nanoparticles on reduced graphene oxide (RGO) sheets suspended in solution developed, which exhibited superior electrocatalytic activity in the hydrogen evolution reaction (HER) relative to other MoS (2) catalysts.
2.9K
Enhancement of photocatalytic H2 evolution on CdS by loading MoS2 as Cocatalyst under visible light irradiation.
TL;DR: This communication presents the recent results that the activity of photocatalytic H2 production can be significantly enhanced when a small amount of MoS2 is loaded on CdS as cocatalyst.
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