Electrocatalytic properties of {Mo₃S₄}-based complexes with regard to the hydrogen evolution reaction and application to PEM water electrolysis

Abstract

We report on the synthesis and the electrochemical characterization of two [Mo3S4]4+ nanoclusters, [Mo3S4(acacbut)3]Cl and [Mo3S4–Pd(acacbut)3]Cl.

Time‐Resolved Spectroscopy and High‐Efficiency Light‐Driven Hydrogen Evolution of a {Mo3S4}‐Containing Polyoxometalate‐Based System

“…In contrast, in the presence of the {Mo 3 S 4 }‐based anion [{(PW 11 O 39 )Mo 3 S 4 (H 2 O) 3 (μ‐OH)} 2 ] 8− , the polarization curve exhibits a noticeable increase of the cathodic current that occurs from about −0.15 V vs. RHE. Similar behavior was also observed with the POM‐free {Mo 3 S 4 } cluster although the cathodic current was significantly lower than those observed with the ThioPOM catalyst [17] . Actually, such qualitative experiments appear fully consistent with our previous reported results and demonstrate that the synergistic electrocatalytic HER effect arising from the covalent linkage between polyoxotungstate ions and {Mo 3 S 4 } cluster can be generalizable to various POM‐Mo 3 S 4 combinations [14] …”

“…Similar behavior was also observed with the POM-free {Mo 3 S 4 } cluster although the cathodic current was significantly lower than those observed with the ThioPOM catalyst. [17] Actually, such qualitative experiments appear fully consistent with our previous reported results and demonstrate that the synergistic electrocatalytic HER effect arising from the covalent linkage between polyoxotungstate ions and {Mo 3 S 4 } cluster can be generalizable to various POM-Mo 3 S 4 combinations. [14] Photocatalysis: Determination of the HER light-driven photocatalytic activity of the ThioPOM compound as tetrabutylamonium salt was carried out using similar conditions that those reported by Hill et al with a tetranickel polyoxotungstate ion.…”

Preparation methods of membrane electrode assemblies for proton exchange membrane fuel cells and unitized regenerative fuel cells: A review

“…hydrogen and oxygen electrodes. However, the same cell is observed to undergo hydrogen evolution [18] and oxygen evolution reactions (HER and OER) at the said electrodes respectively when supplied with water and energy as mentioned earlier. The proton exchange membrane fuel cell (PEMFC) uses a water-based, acidic polymer membrane as its electrolyte.…”

“…1a schematically explains the working of a URFC in respective modes. PEMFCs are a mature technology and have found themselves in marine applications [17,18], portable power sources [19,20], aerospace [21], vehicles etc. [22].…”

Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments

“…In the quest for HER electrocatalysts sufficiently active and stable in acid electrolytes in PEMWE, encouraging results have been obtained with thiomolybdate compounds (molybdenum is a hundred times more abundant in the Earth crust than Pt). 1448 MoS 2 nanocrystallites were found active towards the hydrogen dissociation reaction in the 1980s (in the field of Hydrodesulphurisation in the oil & gas industry). Molybdenum sulphur-based catalysts were also found active for the reverse hydrogen oxidation reaction (HOR) and over the last years, for hydrogen formation in electro- or photo-catalysis HER processes.…”