Molybdenum disulfide coated nickel-cobalt sulfide with nickel phosphide loading to build hollow core-shell structure for highly efficient photocatalytic hydrogen evolution.

Author(s) Zhao, S.; Xu, J.; Li, Z.; Liu, Z.; Li, Y.
Journal J Colloid Interface Sci
Date Published 2019 Aug 06

A hollow spherical NiCoS photocatalytic material was prepared with a high HER activity in the dye sensitization system. Then the hollow spherical NiCoS was coated by the sheet-shaped 2D MoS. Through the band gap adjustment, a type-II heterostructure is constructed to move the photogenerated electrons to the outer layer, and part of photogenerated holes migrate to the inner layer, which successfully reduces the degradation rate of the dye sensitizer for slowing down the decay of H evolution rate in the dye sensitization system. In addition, NiP was used to enrich photogenerated electrons on the outer layer of MoS thereby achieving more efficient hydrogen production. The photocatalytic materials were characterized by XRD, SEM, TEM, XPS, UV-vis DRS and N Isothermal adsorption experiments. The transfer mechanism of photogenerated carriers was studied by PL, photoelectrochemical tests, and hydroxyl radical capture experiments.

DOI 10.1016/j.jcis.2019.08.019
ISSN 1095-7103
Citation J Colloid Interface Sci. 2019;555:689701.

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