Phase-controlled solvothermal syntheses and oxygen evolution reaction (OER) activity of nickel sulfide nanoparticles obtained from 1,2-bis(diphenylphosphino)ethane nickel(ii) acetylacetonatedithiolate

Ayushi Singh, Amita Singh, Gabriele Kociok-Köhn, Ratna Chauhan, Suresh W. Gosavi, Anar Singh, Ashish Kumar Singh, Abhinav Kumar, Mohd Muddassir

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5 Citations (SciVal)

Abstract

A new heteroleptic nickel(ii) complex, [Ni(dppe)(acac)]·CHCl3 (1) (where acac = acetylacetonatedithiolate, dppe = 1,2-bis(diphenylphosphino)ethane), has been synthesized and characterized using different spectroscopic techniques and single-crystal X-ray diffraction. The solvothermal decomposition of the complex in two different solvents, viz. 1-dodecanethiol (DT) and octadecyl amine (ODA), yielded two different nickel sulfides, viz.Ni-DT and Ni-ODA, respectively. These sulfides have been characterized by PXRD and SEM. Rietveld refinement analyses of Ni-DT revealed that it comprises two phases of nickel sulfide, viz. NiS and Ni3S3, while Ni-ODA possesses only a single phase of Ni2S3. The newly synthesized materials have been used as electrocatalysts for the oxygen evolution half-cell reaction of water splitting. The electrochemical studies suggest that Ni-DT/Ni-ODA has a good electrocatalytic activity towards the OER at a low overpotential of ∼200 mV with η1 being 342 mV and 243 mV for Ni-DT and Ni-ODA, respectively, at a scan rate of 1 mV s−1

Original languageEnglish
Pages (from-to)10246-10255
Number of pages10
JournalNew Journal of Chemistry
Volume46
Issue number21
Early online date26 Apr 2022
DOIs
Publication statusPublished - 7 Jun 2022

Bibliographical note

Funding Information:
Dr Mohd. Muddassir is grateful to the Researchers Supporting Project Number (RSP-2021/141), King Saud University, Riyadh, Saudi Arabia, for financial assistance. AS is obliged to CSIR, New Delhi for the financial support in the form of a junior research fellowship (file no. 09/107(0412)/2020-EMR-I).

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Materials Chemistry

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