W2Se3S

metal
· JVASP-28901· W2Se3S

W2Se3S is a mixed-valent tungsten chalcogenide compound containing selenium and sulfur—a layered transition metal dichalcogenide (TMD) hybrid that exists primarily in research contexts rather than established industrial production. This material belongs to the family of two-dimensional nanomaterials being investigated for optoelectronic and catalytic applications, where the combination of different chalcogen atoms creates tunable electronic band structures and enhanced active sites compared to single-chalcogen counterparts. Interest in W2Se3S stems from potential advantages in photocatalysis, electrocatalysis (especially hydrogen evolution reactions), and semiconductor device physics, though it remains largely an experimental compound without widespread commercial deployment.

experimental catalytic materialshydrogen evolution electrocatalystslayered semiconductor researchphotocatalytic water splitting2D nanomaterial device engineeringtransition metal chalcogenide applications

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Bulk Modulus(K)
3.980
GPa—
Poisson's Ratio(ν)
0.3100
-—
Shear Modulus(G)
1.750
GPa—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
6.419
kg/m³—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
0.5150
eV—
Dielectric Constant (Relative Permittivity)(εr)
11.55
-—
Piezoelectric Modulus(eij)
0.01941
C/m²—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
0.09210
eV/atom—
Formation Energy(ΔHf)
-0.6021
eV/atom—
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.