Electrosynthesis of CdS/MoS₂ Using Electrodeposited MoS_x: A Combined Voltammetry–Electrochemical Quartz Crystal Nanogravimetry Study

Abstract

Here, we describe a strategy for preparing CdS/MoS 2 heterostructures using initially electrodeposited MoS x on a polycrystalline gold substrate. The excess sulfur intrinsic to the electrodeposited MoS 3 surface was derivatized with Cd to form spherical CdS/MoS 2 particles by judicious adjustment of the medium pH and interfacial electrochemistry. The progression of this conversion was monitored by a combination of cyclic/ linear sweep voltammetry coupled with electrochemical quartz crystal nanogravimetry. The electrodeposited MoS x and CdS/MoS 2 films were further characterized by scanning electron microscopy, energy-dispersive Xray analysis, laser Raman spectroscopy, and X-ray photoelectron spectroscopy. Heterojunction formation between MoS 2 and CdS particles was confirmed by high-resolution transmission electron microscopy as well as via Kelvin probe measurements of the contact potential differences, with and without the presence of CdS on the MoS 2 surface. The nonoptimized CdS/MoS 2 heterostructures showed improved photoelectrochemical response compared with CdS or MoS 2 for oxidation of sulfite species.

Covalently Linking Reduced Graphene Oxide Facilitated Electrodeposition of MoS2 on Silicon Pyramidal Photocathode To Enhance Hydrogen Evolution

“…In addition, an additional peak located at 226.5 eV can be assigned to S 2s . In the S 2p spectrum (Figure f), the binding energy positions of the S 2p 2/3 and S 2p 1/2 are 161.7 and 163.1 eV in order, which matches well with previous results of electrodeposited MoS 2 . − …”

A Comprehensive Review of MoSx for Improved Photo(electro)catalytic Performance

“…), MOFs, metal monomers, etc. [ 6,7,13,28–30,54,58,59,62,64,74,77,111–134 ] This is followed by some elemental doping, mainly including metal elemental doping (Co, Fe, Ni, Cu, etc. ), nonmetal doping (O, N, etc.…”