PLASMONIC METASURAFCE FOR ENHANCED HER KINETICS BY PHOTOELECTROCHEMICAL WATER SPLITTING.

Hydrogen evolution reaction (HER) kinetics under solar light context has been enhanced by heterostructure photocatalysts assembled from plasmonic nanoparticles (NPs) coupled with semiconductors. Plasmonic Heterostructures manifested HER photocatalytic efficiency greater than solitary semiconductors because plasmonic NPs magnify the absorption wavelengths through their localized surface plasmons resonance (LSPR) within the visible–IR sweep. Nevertheless, these regimes exhibit major hinders of poor charge mobility from the Schottky junction, diminishing and limiting their noteworthy employment. On the contrary, the Plasmonic metasurface is a quintessential route for an undeviating metamorphosis of solar light to green hydrogen. It’s an exquisite technique to magnify the quantum tunneling to adjacent RGO shielding barrier via the creation of hot spots and thermionic emission, through and over the feeble metal-metal junction (Ohmic junction). This approach could be considered to attain intensified hydrogen evolution kinetics at the onset potential of 0VRHE. According to the estimated computational assumptions, an explicit transmittance peak has been observed at 608 nm to produce Plasmonic lattice resonance or coupling by accompanying diffractive modes of a periodic array (SLR) and LSPR of single nanoparticles to enhance near-field coupling. In the visible region, this attribute can be employed to achieve almost 70%-80% HER kinetics compared to the complete solar spectrum, conversely, as solitary, at a specific wavelength corresponds to Plasmonic lattice coupling (608 nm), efficiency could be 20% to 30%[1-3]. This project has received funding from the Research Council of Lithuania (LMTLT), agreement no S-ST-24-10 (Water Splitting Enhancement by Plasmonic Nanomaterials (FORESAIL))