Tungsten disulfide: a novel hydrogen evolution catalyst for water decomposition

Sobczyński, Andrzej; Yıldız, Attila; Bard, Allen J.; Campion, Alan; Fox, Marye Anne; Mallouk, Thomas E.; Webber, S. E.; White, John

doi:10.1021/j100319a042

Cited by 88 publications

(60 citation statements)

References 5 publications

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“…Under irradiation and in the presence of photosensitizers, however, they show activity for hydrogen evolution. 14 decreased with a rise of calcination temperature. This effect was explained by a higher amount of structural defects on the surface, which are the catalytically active sites, for the samples annealed at a lower temperature.…”

Section: Mos 2 In Photocatalytic H 2 Evolutionmentioning

confidence: 92%

“…9 In contrast, MoS 2 was for a long time not considered as a promising HER catalyst because bulk MoS 2 showed poor activity. [10][11][12][13][14] In 2005, Hinnemann et al reported that MoS 2 nanoparticles were active HER catalysts. 15 Since then, the interest in developing and using MoS 2 and related metal sulfides such as WS 2 as HER catalysts has emerged.…”

Section: Introductionmentioning

confidence: 99%

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Recent developments of molybdenum and tungsten sulfides as hydrogen evolution catalysts

Merki

2011

Energy Environ. Sci.

1,134

765

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Recent work shows that nanoparticulate and amorphous molybdenum and tungsten sulfide materials are active catalysts for hydrogen evolution in aqueous solution. These materials hold promise for applications in clean hydrogen production technologies. In this perspective, the syntheses, structures and catalytic activities of nanoparticulate MoS 2 and WS 2 , incomplete cubane-type [Mo 3 S 4 ] 4+ and amorphous MoS x films are summarized, compared, and discussed.

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Section: Mos 2 In Photocatalytic H 2 Evolutionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Recent developments of molybdenum and tungsten sulfides as hydrogen evolution catalysts

Merki

2011

Energy Environ. Sci.

1,134

765

View full text Add to dashboard Cite

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“…[5][6][7][8] Nevertheless, very few studies have been conducted on WS 2 regarding to HER up to date. 5,9-11 The systematic studies of layered WS 2 materials for HER are still not available.…”

mentioning

confidence: 99%

“…[2][3][4] Tungsten disulfide, WS 2 , a member of the semiconducting transition metal dichalcogenide family, has drawn considerable attention due to its semiconducting nature and electrocatalytic activities. [5][6][7][8] Nevertheless, very few studies have been conducted on WS 2 regarding to HER up to date. 5,[9][10][11] The systematic studies of layered WS 2 materials for HER are still not available.…”

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confidence: 99%

Editors' Choice—Growth of Layered WS₂Electrocatalysts for Highly Efficient Hydrogen Production Reaction

Alsabban

Min

Hedhili

et al. 2016

ECS J. Solid State Sci. Technol.

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Seeking more economical alternative electrocatalysts without sacrificing much in performance to replace precious metal Pt is one of the major research topics in hydrogen evolution reactions (HER). Tungsten disulfide (WS 2 ) has been recognized as a promising substitute for Pt owing to its high efficiency and low-cost. Since most existing works adopt solution-synthesized WS 2 crystallites for HER, direct growth of WS 2 layered materials on conducting substrates should offer new opportunities. The future economy requires the production of clean energy to replace fossil fuels. Hydrogen is considered as one of the promising future options as a pollution-free energy carrier. Practically, electrocatalytic water splitting has gained attention for sustainable hydrogen production.1 Accordingly, scientists are eagerly seeking for an electrocatalyst that could act as an alternative to the most electrochemically active but expensive platinum metal.2-4 Tungsten disulfide, WS 2 , a member of the semiconducting transition metal dichalcogenide family, has drawn considerable attention due to its semiconducting nature and electrocatalytic activities. [5][6][7][8] Nevertheless, very few studies have been conducted on WS 2 regarding to HER up to date. 5,9-11 The systematic studies of layered WS 2 materials for HER are still not available. 1 Herein, we report our preparation of layered WS 2 electrocatalysts for highly efficient hydrogen production reaction.We have performed the growth of WS 2 by the thermolysis of ammonium tetrathiotungstate (NH 4 ) 2 WS 4 on conducting carbon cloth (CC) substrates under different gaseous environments. As CC is conducting with a high surface area, it is an ideal substrate for loading the WS 2 materials.1 The influence of environmental gas on the electrochemical activity of the obtained WS 2 catalysts were studied. H 2 S was found to give the WS 2 electrocatalysts with superior performance for the hydrogen production with a current density of 10 mA cm −2 at a low overpotential of 184 mV. Materials and MethodsMaterials.-All chemicals including sulfuric acid (H 2 SO 4 ) and ammonium tetrathiotungstate (NH 4 ) 2 WS 4 were purchased from commercial sources and used without further purification. Water used was purified through a Millipore system. Preparation of WS 2 .-The precursor, ammonium tetrathiotungstate solution ((NH 4 ) 2 WS 4 (Alfa Aesa 99.9%) in 5.0 wt% in DMF (dimethylformamide)), was casted on CC substrates (W0S1002 * Electrochemical Society Member.z E-mail: hkw@kaust.edu.sa from CeTech) with a loading amount of 1 mg/cm 2 (Scheme 1). The drop-casted conducting carbon cloth substrate was then baked on a hot plate at 160• C for 20 min. Subsequently, it was fed into the tube furnace for thermolysis process under atmospheric pressure (AP) at varied temperatures and in different gaseous environments, including H 2 S and Ar (10 and 90 sccm respectively), H 2 and Ar (10 and 90 sccm respectively), and pure Ar (100 sccm). In order to exclude oxygen species from the system, tube furnace was pumped and p...

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“…This problem can be solved with metal sulfides, whose bandgaps are much smaller [37][38][39][40][41][42][43][44][45][46][47][48]. However, because sulfides undergo photocorrosion under bandgap irradiation [49][50][51], sacrificial electron donors, such as Na 2 S and Na 2 SO 3 [40,42], are necessary to maintain catalytic activity.…”

Section: Cdse Nanoribbons As a Quantum-confinedmentioning

confidence: 99%

Nanoparticle-Assembled Catalysts for Photochemical Water Splitting

Osterloh

On Solar Hydrogen &Amp; Nanotechnology

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Over 130 materials are known to catalyze the conversion of water to hydrogen and oxygen (Equation 16.1) [1], but most of them are plagued by either low energy efficiency, inadequate light absorption in the visible range, or material instability under catalytic conditions.DG ¼ þ 237 kJmol À1 ð1:3 eVe À1 ; l min ¼ 1100 nmÞ ð16:1ÞThese issues can potentially be solved with nanostructured catalysts that contain separate components for light absorption, water oxidation and water reduction. By building these structures in modular fashion from separate, preformed nanoparticles, it should be possible to optimize the catalytic function by adjusting the discrete properties of the various components. The working cycle of a hypothetical three-component catalyst is illustrated in Figure 16.1a. As the first step, bandgap absorption of a photon produces an electron-hole pair in the semiconductor (step 1 in Figure 16.1a). The pair becomes separated at the nanointerface, with the electron being guided (step 2) along a path of decreasing energy to the metal particle, where it enters an energy level above the Fermi level and becomes available as a reducing agent for water (step 3). If this step is fast enough (<50 ps), it will prevent recombination of the electron-hole pair -a limiting factor for water-splitting photocatalysts. Subsequently, an electron from the valence band of the metal-oxide particle is injected into

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Tungsten disulfide: a novel hydrogen evolution catalyst for water decomposition

Cited by 88 publications

References 5 publications

Recent developments of molybdenum and tungsten sulfides as hydrogen evolution catalysts

Recent developments of molybdenum and tungsten sulfides as hydrogen evolution catalysts

Editors' Choice—Growth of Layered WS₂Electrocatalysts for Highly Efficient Hydrogen Production Reaction

Nanoparticle-Assembled Catalysts for Photochemical Water Splitting

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Tungsten disulfide: a novel hydrogen evolution catalyst for water decomposition

Cited by 88 publications

References 5 publications

Recent developments of molybdenum and tungsten sulfides as hydrogen evolution catalysts

Recent developments of molybdenum and tungsten sulfides as hydrogen evolution catalysts

Editors' Choice—Growth of Layered WS2Electrocatalysts for Highly Efficient Hydrogen Production Reaction

Nanoparticle-Assembled Catalysts for Photochemical Water Splitting

Contact Info

Product

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Editors' Choice—Growth of Layered WS₂Electrocatalysts for Highly Efficient Hydrogen Production Reaction