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This study investigates the photoelectrochemical potential of 1T/2H-MoS 2 nanoparticles synthesized via chemical vapor deposition. The 60 nm nanoparticles, analyzed using SEM, XRD, Raman spectroscopy, and XPS, have a high-quality mixed-phase composition. TEM revealed a core–shell structure. A MoS 2 /p-Si photocathode showed a current density of −13.5 ± 1 mA/cm 2 at 0 V and an onset potential of 110 mV, with rapid photoresponse times and an 8 % IPCE at 450 nm. The mixed-phase and core–shell structure enhance electronic and catalytic properties, promising advancements in renewable energy technologies. Green hydrogen is a highly sought-after clean fuel for the next generation of engines aimed at achieving net-zero emissions. Herein, we design and fabricate a mixed-phase core/shell nanoparticles consisting of a semiconducting 2H-MoS 2 core and a metallic 1T-MoS 2 coating. The core/shell exhibits spherical morphology with an average diameter of 60 nm. To leverage this unique structure, we develop a photocathode device composed of 1T/2H-MoS 2 core/shell integrated with p-type silicon to catalyze hydrogen evolution reaction via water splitting driven by solar energy. The core/shell device demonstrates, at zero bias, a remarkable current density of −13.5 ± 1 mA/cm 2 and an onset potential of 110 mV. Additionally, the device exhibited a rapid photoresponse time and a high incident photon-to-current efficiency reaching 80 % at 450 nm. Our findings highlight the synergistic effect of 1T/2H-MoS 2 mixed-phase core/shell structure in developing the next generation of high-efficient photocatalysts for green hydrogen generation.
Mouloua et al. (Fri,) studied this question.