2D bifunctional tungsten disulfide-embedded UiO-66 (WS₂@UiO-66) as a highly active electrocatalyst for water splitting

Abstract

Effective water splitting electrocatalysts provides greater potential for production of hydrogen as fuel in renewable and sustainable energy devices. To achieve easy and cost-effective water splitting process, electrocatalysts are bottle...

Interfacial Heterojunction Formation Modulating the Charge Carrier’s Pathway of CdS@CoSe2/WS2 Nanocomposites for Enhanced Photocatalytic Hydrogen Evolution

“…29,70 In the meantime, 1D CdS nanorods with a high aspect ratio and adequate band edge potentials enable charge carrier separation, while 2D WS 2 nanosheets with a large surface area provide an extensive number of active sites to trigger the water reduction reaction. 71,72 Together, CdS, WS 2 , and CoSe 2 form a heterojunction that has the synergistic effect of suppressing exciton recombination, allowing for charge transfer toward the CoSe 2 /WS 2 nanostructure, which acts as an electron sink and contribute for water-splitting to produce hydrogen. Additionally, the CoSe 2 /WS 2 nanostructures enhancing the durability of the CdS@CoSe 2 /WS 2 photocatalyst by lowering the chance of photo corrosion and deterioration.…”

“…Meanwhile the photogenerated holes in the reaction medium react with the hole scavenger, reducing the chance of recombination. The contribution of each nanostructure can be interpreted as follows: The combination of hollow CoSe 2 nanostructures constructed from ZIF-67 nanostructures with porous morphology and internal cavities offers several light reflection centers to improve light absorption. , In the meantime, 1D CdS nanorods with a high aspect ratio and adequate band edge potentials enable charge carrier separation, while 2D WS 2 nanosheets with a large surface area provide an extensive number of active sites to trigger the water reduction reaction. , Together, CdS, WS 2 , and CoSe 2 form a heterojunction that has the synergistic effect of suppressing exciton recombination, allowing for charge transfer toward the CoSe 2 /WS 2 nanostructure, which acts as an electron sink and contribute for water-splitting to produce hydrogen. Additionally, the CoSe 2 /WS 2 nanostructures enhancing the durability of the CdS@CoSe 2 /WS 2 photocatalyst by lowering the chance of photo corrosion and deterioration.…”