- Electronic Applications of 2D Materials
- Sensors and Energy Devices Applications of 2D Materials
- Photonic and Optoelectronic Applications of 2D Materials
- Bio and Ecological Applications of 2D Materials
Hydrogen Generation Based on 2D Materials
Hydrogen is a clean and efficient energy carrier for fuel cell power generation, producing only water as a by-product and therefore lowering pollution levels. Electrolysis/photolysis is a possible approach to generate hydrogen energy on a large scale among the many technologies available, including chemical, biological, electrolytic, photolytic, and thermochemical processes.
The development of efficient catalysts for hydrogen production is critical to making hydrogen an energy green energy fuel. Alfa chemistry can meet customer needs with unique two-dimensional (2D) material solutions to meet customer needs. Please contact us as soon as possible so that we can help you with your hydrogen catalytic applications research.
Electrochemical Catalytic Support
Due to their superior HER catalytic activity and unique physicochemical features, highly efficient, stable, and non-precious metal-based hydrolysis electrocatalysts, particularly TMDCs 2D materials, have recently garnered a lot of attention in the field of hydrogen precipitation reactions (HER). Alfa Chemistry has been very successful in changing these electrocatalysts via plasma treatment procedures, such as creating more active sites, enhancing the activity of particular active sites, and developing active site connections with the electrolyte, to improve electrocatalytic performance.
Fig 1. Illustration of the preparation of plasma treatment of MoS2 thin films. (Tao L, et al. 2015)
We fabricate molybdenum disulfide (MoS2) films as effective electrocatalysts for HER using Ar or O2 plasma-assisted techniques. Physical and chemical flaws in the MoS2 films are formed after Ar or O2 plasma treatment, exposing additional active sites.
We employed an effective plasma oxidation approach to construct atomic-level holes in the substrate of electrochemically inert tantalum disulfide (TaS2) nanosheets to activate 2D crystals for excellent performance in electrocatalytic HER, in addition to surface engineering of MoS2.
Solar energy is being used to produce photocatalytic hydrogen on the catalyst surface, which is a possible option for the present energy and environmental problems. Due to a variety of advantages such as atomic thickness, morphology, electron confinement, and enhanced surface area to volume ratio, 2D photocatalysts have recently gained a lot of attention.
Alfa Chemistry offers customers a wide range of 2D photocatalysts including transition metal dithiocarbons, MXenes and novel composites, graphene and graphene-like materials, metal-organic frameworks and composites, and novel 2D heterojunction materials. We also modify and manipulate the morphological/electronic features of 2D materials to optimize their photocatalytic performance.
Fig 2. Different types of light-absorbing 2D photocatalytic materials.
Surface Engineering - Surface modulation is used to alter the physicochemical properties of nanostructures. The band gap, electrical conductivity, and even magnetic characteristics of these 2D NMs can all be improved using this technique. The efficacy of photocatalytic characteristics will be determined by tuning the properties of the exposed surfaces of 2D materials by generating changes during synthesis.
Binding of Metal Nanoparticles - Doping metal nanoparticles on the semiconductor surface is another simple customized approach for improving photocatalyst basic features. This causes charge separation, which speeds up the photochemical reaction. We synthesized Cu-doped MoS2 nanosheets on CdS nanorods. A simple two-step hydrothermal procedure was used to create this ternary heterostructure. When compared to clean CdS nanorods, the composite nanostructures release 52 times more H2.
Doping with Non-Metallic Heteroatoms - The introduction of molecules or atoms on the surface of 2D materials increases electron migration, which effectively leads to an increase in intrinsic conductivity. Alfa Chemistry added hydrogen in the precursor phase during intermediate formation, resulting in hydrogen-added TiS2 nanosheets. Additional electrons are given between the intercalation of S-Ti-S layers in this HyTiS2 process. This results in high electronic conductivity. We also used a surface modification of the molecules to influence carrier movement. Water molecules were used in VS2 nanosheets, which resulted in an increase in resistance.
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- Tao L et al. (2015). "Plasma-Engineered MoS2 Thin-Film as An Efficient Electrocatalyst for Hydrogen Evolution Reaction." Chem. Commun. 51: 7470-7473.
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