Recent Advances in 2D Group VB Transition Metal Chalcogenides

Abstract

2D materials have received considerable research interest owing to their abundant material systems and remarkable properties. Among them, 2D group VB transition metal chalcogenides (GVTMCs) stand out as emerging 2D metallic materials and significantly broaden the research scope of 2D materials. 2D GVTMCs have great advantages in electrical transport, 2D magnetism, charge density wave, sensing, catalysis, and charge storage, making them attractive in the fields of functional devices and energy chemistry. In this review, the recent progress of 2D GVTMCs is summarized systematically from fundamental properties, growth methodologies to potential applications. The challenges and prospects are also discussed for future research in this field.

Multifunctionalized Metal Chalcogenides and Their Roles in Catalysis and Biomedical Applications

“…Furthermore, unique stage structures (such as the H and T phases) exhibited observable magnetism. [43] Vibrating Sample Magnetometry was used to examine the magnetic behavior of bulk and atomically thin metal telluride at ambient temperature (300 K) which has higher magnetic saturation than paramagnetic materials. When a metal has oxidized, a hard oxide scale was formed to protect it from further oxidation.…”

“…At high temperature, the TMC changed into the vivacious stage, which leads to the turn of polarization and ferromagnetism by bringing up a solid localization of the electronic states close to the Fermi level. Furthermore, unique stage structures (such as the H and T phases) exhibited observable magnetism [43] . Vibrating Sample Magnetometry was used to examine the magnetic behavior of bulk and atomically thin metal telluride at ambient temperature (300 K) which has higher magnetic saturation than paramagnetic materials.…”

Mild Liquid-Phase Exfoliation of Transition Metal Dichalcogenide Nanosheets for Hydrogen Evolution

“…The development of hydrogen energy is one of the best ways to maintain sustainable development and address environmental pollution issue and energy crisis. − At present, the commercial catalysts for hydrogen evolution reaction (HER) are dominated by precious metals (Pt, Ru, Pd, etc. ), but the shortage of resources and the instability of precious metals severely limit the development of hydrogen energy. , Among the numerous non-precious metal HER catalysts, transition metal dichalcogenides (TMDs) have attracted extensive attention because their free energy of hydrogen adsorption (Δ G H ) is closer to the thermoneutral value and they have a low material cost, so they are expected to be a good alternative to precious metal commercial HER catalysts. − Bulk layered TMDs widely exist in nature; however, their catalytical properties are severely limited due to the insufficiency of edge active sites . Accordingly, the preparation of ultrathin, exfoliated two-dimensional (2D) TMDs to release a larger specific surface area and more edge active sites is the key to advance TMDs in HER applications. , Up to now, two strategies have been applied to produce 2D TMD nanosheets, including bottom-up and top-down. , Chemical vapor deposition and physical vapor deposition are two common bottom-up methods for producing large-area and high-quality TMDs, but the relatively complexed experimental conditions (such as high temperatures of 600–1000 °C, vacuum environment, and so on) and difficulty in transferring onto a substrate significantly increase the cost, making these two methods more suitable for electronic applications rather than industry-scale catalyst applications. , For the top-down approach, it mainly contains mechanical cleavage and liquid-phase exfoliation (LPE).…”

“…), but the shortage of resources and the instability of precious metals severely limit the development of hydrogen energy. 4,5 Among the numerous non-precious metal HER catalysts, transition metal dichalcogenides (TMDs) have attracted extensive attention because their free energy of hydrogen adsorption (ΔG H ) is closer to the thermoneutral value and they have a low material cost, so they are expected to be a good alternative to precious metal commercial HER catalysts. 6−8 Bulk layered TMDs widely exist in nature; however, their catalytical properties are severely limited due to the insufficiency of edge active sites.…”

Anisotropic Magnetoresistance Effect of Intercalated Ferromagnet FeTa3S6

“…In recent decades, transition metal dichalcogenides (TMDs) have attracted research interest due to their unique properties and potential applications in a broad range of areas [1][2][3][4][5][6][7]. TMDs are a class of layered materials whose crystal structures can be classified as, depending on the local coordination of chalcogen atoms around the central transition metal, 1H (trigonal prismatic), 1T (octahedral), 1T' (distorted octahedral), 2H (hexagonal), 3R (rhombohedral), and Td (orthorhombic) phases, and most of them are two-dimensional (2D) van der Waal materials [8][9][10][11].…”