Layer-by-Layer Motif Heteroarchitecturing of N,S-Codoped Reduced Graphene Oxide-Wrapped Ni/NiS Nanoparticles for the Electrochemical Oxidation of Water

Mohamed Barakat Zakaria, Yanna Guo, Jongbeom Na, Rafat Tahawy, Toyohiro Chikyow, Waleed A. El-Said, Deia A. El-Hady, Wael Alshitari, Yusuke Yamauchi, Jianjian Lin

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A new heterostructured material is synthesized with lamellar arrangements in nanoscale precision through an innovative synthetic approach. The self-assembled Ni-based cyano-bridged coordination polymer flakes (Ni-CP) and graphene oxide (GO) nanosheets with a layered morphology (Ni-CP/GO) are used as precursors for the synthesis of multicomponent hybrid materials. Annealing of Ni-CP/GO in nitrogen at 450 °C allows the formation of Ni3C/rGO nanocomposites. Grinding Ni-CP/GO and thiourea and annealing under the same conditions produces N,S-codoped reduced GO-wrapped NiS2 flakes (NiS2/NS-rGO). Interestingly, further heating up to 550 °C allows the phase transformation of NiS2 into NiS accompanied by the formation of a face-centered cubic (FCC-Ni) metal phase between NS-rGO layers (FCC-Ni-NiS/NS-rGO). Among all the materials, the resulting FCC-Ni-NiS/NS-rGO exhibits good electrocatalytic activity and stability toward the oxygen evolution reaction (OER) owing to the synergistic effect of multiphases, the well-designed alternating layered structures on the nanoscale with abundant active sites.

Original languageEnglish
Pages (from-to)3269-3276
Number of pages8
JournalChemSusChem
Volume13
Issue number12
DOIs
Publication statusPublished - 2020 Jun 19
Externally publishedYes

Keywords

  • electrocatalysis
  • heterostructures
  • metal carbides
  • metal sulfides
  • nanohybrids

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

Fingerprint Dive into the research topics of 'Layer-by-Layer Motif Heteroarchitecturing of N,S-Codoped Reduced Graphene Oxide-Wrapped Ni/NiS Nanoparticles for the Electrochemical Oxidation of Water'. Together they form a unique fingerprint.

Cite this