1 research outputs found
Photo-Promoted Platinum Nanoparticles Decorated MoS<sub>2</sub>@Graphene Woven Fabric Catalyst for Efficient Hydrogen Generation
Hydrogen production from water splitting
has been considered as an effective and sustainable method to solve
future energy related crisis. Molybdenum sulfides (e.g., MoS<sub>2</sub>) show promising catalytic ability in hydrogen evolution reaction
(HER). Combining MoS<sub>2</sub> with conductive carbon-based materials
has aroused tremendous research interest recently. In this work, a
highly efficient multiple-catalyst is developed for HER by decorating
Pt nanoparticles (Pt NPs) on MoS<sub>2</sub>@graphene protected nickel
woven fabrics (NiWF) substrate, which comprises the following components:
(i) Graphene protected NiWF acts as the underlying substrate, supporting
the whole structure; (ii) MoS<sub>2</sub> nanoplates serve as a central
and essential photosensitive component, forming a heterostructure
with graphene simultaneously; and (iii) on the basis of the intrinsic
photoluminescence effect of MoS<sub>2</sub>, together with the photoelectric
response at the MoS<sub>2</sub>/graphene interface, Pt NPs are successfully
deposited on the whole structure under illumination. Particularly
and foremost, this work emphasizes on discussion and verification
of the underlying mechanism for photopromoted electroless Pt NPs deposition.
Due to this assembly approach, the usage amount of Pt is controlled
at ∼5 wt % (∼0.59 at. %) with respect to the whole catalyst.
MoS<sub>2</sub>@Substrate with Pt NPs deposited under 643 nm illumination,
with the synergistic effect of MoS<sub>2</sub> active sites and Pt
NPs, demonstrates the most superior electrocatalytic performance,
with negligible overpotential and low Tafel slope of 39.4 mV/dec