Thioxanthate complexes of {Nb2S4}4+

Nb2S4(CS2NH2)4—A New Precursor for NbS2 and Its Transition Metal Inserted Derivatives

“…The vibrations of the dithiocarbamate ligand can be assigned to the bands at 3399, 3274, 3144 cm −1 (υ N-H), 1580 cm −1 (NH2 bending), 1376 cm −1 (C-N stretching), 840 cm −1 (C-S stretching), 1236 cm −1 and extending bands to 1050 cm −1 as well as 854 and 841 cm −1 (NH2 rocking coupled to C-S stretching), 630 cm −1 (C-S stretching) [45]. The Raman spectrum shows known characteristic bands for the [Nb2S4] 4+ core with the S-S vibration at 565 cm −1 [37,42,46] and various Nb-S vibrations in the range of 370-250 cm −1 .…”

“…Precursors containing carbon-rich ions or ligands tend to form metal sulfides with significant carbon content, as exemplified by (NR 4 ) 2 MS 4 [40,41]. For thioxanthate complexes of Nb with the general formula [Nb 2 S 4 (CS 2 CR 2 ) 4 ] the formation of amorphous carbon containing NbS 2 was reported to occur upon thermal decomposition at 500 • C [42]. Therefore, the known plethora of compounds bearing the [Nb 2 S 4 ] 4+ -cation, along with other carbon or oxygen-containing ligands, appear less appealing as precursors for the preparation of pure NbS 2 .…”

CeO2-supported multi-nuclear NbxSy clusters for hydrogen evolution reaction

“…A series of mono/bi-nuclear Nb x S y clusters in the gas phase have been explored for their structural evolution, chemical bonding, and electronic structures, including NbS n ( n = 1–2), 21 NbS n 2−/−/0 ( n = 3–5), 15 NbS 6 −/0 , 22 Nb 2 S n 4+ ( n = 2–4) 23,24 and Nb 2 S n −/0 ( n = 4–7). 25 The reactivities of the gas-phase NbS + cation with some small molecules, such as CO and CO 2 have been investigated, 26–28 and several bi-nuclear complexes containing Nb 2 S 4 4+ cores have been reported as precatalysts in the reaction of HER.…”

“…[17][18][19] The current densities of metallic 2H Nb 1.35 S 2 as an HER catalyst could reach >5000 mA cm −2 at ∼420 mV versus a reversible hydrogen electrode, showing the great potential application of Nb-S-based HER catalysts. 20 A series of mono/bi-nuclear Nb x S y clusters in the gas phase have been explored for their structural evolution, chemical bonding, and electronic structures, including NbS n (n = 1-2), 21 NbS n 2−/−/0 (n = 3-5), 15 NbS 6 −/0 , 22 Nb 2 S n 4+ (n = 2-4) 23,24 and Nb 2 S n −/0 (n = 4-7). 25 The reactivities of the gas-phase NbS + cation with some small molecules, such as CO and CO 2 have been investigated, [26][27][28]…”