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

doi:10.1002/cssc.202000159

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

ChemSusChem. 2020 Jun 19;13(12):3269-3276. doi: 10.1002/cssc.202000159. Epub 2020 May 12.

Authors

Mohamed Barakat Zakaria^{1

2

3

4}, Yanna Guo³, Jongbeom Na^{1

4}, Rafat Tahawy³, Toyohiro Chikyow⁵, Waleed A El-Said⁶, Deia A El-Hady⁶, Wael Alshitari⁶, Yusuke Yamauchi^{1

3

4

7}, Jianjian Lin¹

Affiliations

¹ Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao, 266042, China.
² Department of Chemistry, Faculty of Science, Tanta University, Tanta, Gharbeya, 31527, Egypt.
³ International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
⁴ School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia.
⁵ Materials Data & Integrated System (MaDIS), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan.
⁶ Department of Chemistry, College of Science, University of Jeddah, P.O. 80327, Jeddah, 21589, Saudi Arabia.
⁷ Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea.

PMID: 32133787
DOI: 10.1002/cssc.202000159

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 Ni₃ C/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.

Keywords: electrocatalysis; heterostructures; metal carbides; metal sulfides; nanohybrids.

Abstract

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