Electrosynthesis of MoTe₂ Thin Films: A Combined Voltammetry-Electrochemical Quartz Crystal Microgravimetry Study of Mechanistic Aspects

Abstract

Molybdenum telluride (MoTe2) belongs to the family of layered transition metal dichalcogenides (TMDs) with unique optical, optoelectronic, structural properties and potential applications in a wide array of technologies related to solar energy conversion, optoelectronics, lubrication, and hydrogen production. Here, electrodeposition is shown to be a facile method for the synthesis of MoTe2 in bulk (i.e., not exfoliated) form. The electrosynthesis of MoTe2 films and the underlying compound formation mechanism were investigated for the first time using linear sweep voltammetry (LSV) combined with electrochemical quartz crystal microgravimetry (EQCM). A Te-modified electrode in an electrolyte containing molybdenum precursor species, a MoO x -modified electrode in tellurium precursor-containing electrolyte and a variety of control experiments were employed to elucidate the electrodeposition mechanism of MoTe2 films. Electrogeneration of HTe− was the key step in MoTe2 film formation which occurred by the reaction of electrodeposited MoO x with HTe− generated by electroreduction of Te or HTeO2 +. Thermodynamic aspects of this reaction are finally presented.

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

“…As in our companion studies, − the combination of linear sweep or cyclic voltammetry (LSV or CV) and electrochemical quartz crystal nanogravimetry (EQCN) offered insights into the film conversion process. Product confirmation was furnished by a variety of ex situ chemical characterization tools in concert.…”

Design, synthesis and application of two-dimensional metal tellurides as high-performance electrode materials

“…In recent years, tellurides have become widely used in electrochemistry owing to their 2D layered structure and unique properties ( Wang et al, 2019 ; Li et al, 2020a ; Myung et al, 2020 ; Zhang et al, 2021 ). On this basis, we provide a comprehensive overview of tellurides in this study, as shown in Figure 1 .…”

Electronic devices for the combination of electrically controlled drug release, electrostimulation, and optogenetic stimulation for nerve tissue regeneration

“…The most frequently used equipment is the Autolab PGSTAT, as in Jarolímová et al [292,293], Alatraktchi et al [294], Juvêncio Silvo et al [295], Pattananuwat & Aht-ong [296], and Lee et al [297]; or other Metrohm Autolab solutions, such as the µ-Autolab Type III in Ashjari et al [298]. EG&G Instruments commercial solutions is also a widespread option, as shown in Khaydukova et al [299] using a PARSTAT, Bagheri & Marand [300] using a M273, Shatla et al [301] employing a 273A, or Jee et al [302] and Myung et al [303] using a 263A model. Custom solutions in terms of data analysis are common between the examples mentioned before, but really scarce in terms of the whole setup, including the hardware.…”