1,2-Bis(diphenylphosphino)ethane nickel(<scp>ii</scp>) O,O′-dialkyldithiophosphates as potential precursors for nickel sulfides

Yadav, Reena; Singh, Ashish Kumar; Waghadkar, Yogesh; Kociok‐Köhn, Gabriele; Kumar, Abhinav; Chauhan, Ratna; Rane, Sunit; Gosavi, Suresh

doi:10.1039/c6nj03186b

Cited by 16 publications

(5 citation statements)

References 68 publications

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“…Single-sourcep recursors of different types, such as xanthates [7] and their pyridine adducts, [8] thio and dithiobiurets, [9] dithiocarbamates, [10] and dithiophosphates [11] have been exploredt op repare nickel sulfide nanoparticles. On the other hand,n ickel phosphide is more scarce and usually prepared by using multiple sources, whicho ften require toxic reagents, ele-vated temperatures, prolongedr eaction times, and the possibility of batch-to-batchv ariation cannot be avoided.…”

Section: Introductionmentioning

confidence: 99%

Flexible Molecular Precursors for Selective Decomposition to Nickel Sulfide or Nickel Phosphide for Water Splitting and Supercapacitance

Ayom

Khan

Ingsel

et al. 2020

Chemistry A European J

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Herein, the synthesis of three nickel(II) dithiophosphonate complexes of the type [Ni{S2P(OR)(4‐C6H4OMe)}2] [R=H (1), C3H7 (2)] and [Ni{S2P(OR)(4‐C6H4OEt}2] [R=(C6H5)2CH (3)] is described; their structures were confirmed by single‐crystal X‐ray studies. These complexes were subjected to surfactant/solvent reactions at 300 °C for one hour as flexible molecular precursors to prepare either nickel sulfide or nickel phosphide particles. The decomposition of complex 2 in tri‐octylphosphine oxide/1‐octadecene (TOPO/ODE), TOPO/tri‐n‐octylphosphine (TOP), hexadecylamine (HDA)/TOP, and HDA/ODE yielded hexagonal NiS, Ni2P, Ni5P4, and rhombohedral NiS, respectively. Similarly, the decomposition of complex 1 in TOPO/TOP and HDA/TOP yielded hexagonal Ni2P and Ni5P4, respectively, and that of complex 3 in similar solvents led to hexagonal Ni5P4, with TOP as the likely phosphorus provider. Hexagonal NiS was prepared from the solvent‐less decomposition of complexes 1 and 2 at 400 °C. NiS (rhom) had the best specific supercapacitance of 2304 F g−1 at a scan rate of 2 mV s−1 followed by 1672 F g−1 of Ni2P (hex). Similarly, NiS (rhom) and Ni2P (hex) showed the highest power and energy densities of 7.4 kW kg−1 and 54.16 W kg−1 as well as 6.3 kW kg−1 and 44.7 W kg−1, respectively. Ni5P4 (hex) had the lowest recorded overpotential of 350 mV at a current density of 50 mA cm−2 among the samples tested for the oxygen evolution reaction (OER). NiS (hex) and Ni5P4 (hex) had the lowest overpotentials of 231 and 235 mV to achieve a current density of 50 mA cm−2, respectively, in hydrogen evolution reaction (HER) examinations.

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Section: Introductionmentioning

confidence: 99%

Flexible Molecular Precursors for Selective Decomposition to Nickel Sulfide or Nickel Phosphide for Water Splitting and Supercapacitance

Ayom

Khan

Ingsel

et al. 2020

Chemistry A European J

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“…Numerous single-source precursor compounds, which already contain a nickel sulfur bond, such as nickel dithiocarbamate [28][29][30][31][32][33][34], dithiocarbonate (xanthate) [35][36][37][38][39][40], thiolate [10,41], dithiooxamide [42], thiourea [43], thiobenzoate [44], thiobiuret [45], mercaptobenzothiazole [46], thiosemicarbazide [47], polysulfide [48], imidodiphosphinate [49] or dithiophosphate [50], have already been investigated for the fabrication of various nickel sulfide nanostructures.…”

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confidence: 99%

Nickel sulfide thin films and nanocrystals synthesized from nickel xanthate precursors

et al. 2017

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Nickel sulfide thin films and nanocrystals stabilized with oleylamine ligands are prepared from two different nickel xanthates as single-source precursors, which decompose at approx. 180°C, and are thereby converted into nickel sulfide. These nickel xanthates comprise branched alkyl moieties allowing the choice of a wide range of nonpolar organic solvents for the processing to nickel sulfide thin films as well as to nanoparticles. The crystal structures of both compounds show a typical square-planar coordination of the sulfur atoms of both xanthates to the nickel central atom. The thermal decomposition via the Chugaev reaction forming nickel sulfide was studied by thermal gravimetric analysis showing the reaction taking place at about 180°C. Consequently, by thermally converting spin-coated metal xanthate films directly on the substrates in the solid state, thin films consisting of hexagonal nickel sulfide are formed. If the nickel xanthates are heated in an oleylamine solution, oleylaminecapped nickel sulfide nanocrystals are obtained, exhibiting hexagonal NiS as main phase and Ni 3 S 4 as secondary phase. This is also reflected in a sulfur-rich composition of the synthesized nickel sulfide nanocrystals as observed from TEM-EDX analyses.

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“…A lower R ct parameter evinced best acceleration of the catalytic process (adsorption/desorption of H + /OH − on the catalyst surface) for d Co-Bu in comparison to d Co-Et and d Co-Pr . 53–59 Likewise, the smallest value of the phase is observed in the Bode plot (Fig. 5d), indicative of faster kinetics for d Co-Bu .…”

Section: Resultsmentioning

confidence: 86%

“…60,61 Overall, the OER operates on the catalytic surface with electrochemically produced metal cations as active sites as shown in Scheme 2. 53–59…”

Section: Resultsmentioning

confidence: 99%

1,2-Bis-(diphenylphosphino)ethane (dppe) appended cobalt(iii)-dithiocarbamates as single source precursors of cobalt sulfide/cobalt phosphide composites: apt electrocatalytic materials for water splitting reactions

Srivastava,

Kushwaha,

Sudheer

et al. 2024

New J. Chem.

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1,2-Bis(diphenylphosphino)ethane nickel(ii) O,O′-dialkyldithiophosphates as potential precursors for nickel sulfides

Abstract: Three new dppe nickel(ii) dithiophosphates with different counteranions synthesized and decomposed to obtain Ni–S systems with same phase independent of the nature of counteranions and alkyl fragments.

Cited by 16 publications

References 68 publications

Flexible Molecular Precursors for Selective Decomposition to Nickel Sulfide or Nickel Phosphide for Water Splitting and Supercapacitance

Flexible Molecular Precursors for Selective Decomposition to Nickel Sulfide or Nickel Phosphide for Water Splitting and Supercapacitance

Nickel sulfide thin films and nanocrystals synthesized from nickel xanthate precursors

1,2-Bis-(diphenylphosphino)ethane (dppe) appended cobalt(iii)-dithiocarbamates as single source precursors of cobalt sulfide/cobalt phosphide composites: apt electrocatalytic materials for water splitting reactions

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