Abstract
Crystals of earth-abundant tin disulfide exhibit high-surface-area platelet formation with ideal photocatalytic properties for water splitting in their ground state.
Highlights
Today, more than 50% of global primary oil demand is concentrated in the transport sector, compared with around 7% in power generation.[1]
Recent studies have shown that the relatively cheap/abundant transition metal dichalcogenides (e.g. WSe2, MoS2) are promising candidates for photocatalysis and photoelectrochemisty.[2,3]. In these species the chalcogenide anions pack hexagonally between octahedrally coordinated metal cations, resulting in distinct layers bound by weak van der Waals (VdW) interactions.[4,5]. Do their band gaps typically correspond to regions of the terrestrial light spectrum with high photon intensities,[6] but their valence and conduction band extrema reside near to the energy levels associated with photoelectrochemical water splitting (À4.44 and À5.67 eV to the vacuum potential for reduction,[7] and oxidation,[8] respectively).[9]
Single crystal X-ray diffraction (XRD) con rmed that the SnS2 crystals had the standard hexagonal crystal structure with P3m1 symmetry corresponding to the ground state 2H polytype with the lattice constants a 1⁄4 3.649 Aand c 1⁄4 5.899 A.28
Summary
More than 50% of global primary oil demand is concentrated in the transport sector, compared with around 7% in power generation.[1]. Recent studies have shown that the relatively cheap/abundant transition metal dichalcogenides (e.g. WSe2, MoS2) are promising candidates for photocatalysis and photoelectrochemisty.[2,3] In these species the chalcogenide anions pack hexagonally between octahedrally coordinated metal cations, resulting in distinct layers bound by weak van der Waals (VdW) interactions.[4,5] do their band gaps typically correspond to regions of the terrestrial light spectrum with high photon intensities,[6] but their valence and conduction band extrema reside near to the energy levels associated with photoelectrochemical water splitting (À4.44 and À5.67 eV to the vacuum potential for reduction,[7] and oxidation,[8] respectively).[9] the large surface area that can be obtained with these ultra-thin structures is a major driving force behind the increased activity in the eld, because of the increased active area, but because in a 2D system, charges need not migrate to a surface before becoming available to the exterior medium.
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