Jump to main content
Jump to site search


The application of a nickel(II) Schiff base complex in water oxidation: the importance of nanosized materials

Author affiliations

Abstract

Herein, the role of Ni oxide in the electrocatalytic water oxidation of a nickel(II) Schiff base (N,N′-bis (salicylidene)ethylenediamino nickel(II)) is investigated using scanning electron microscopy, transmission electron microscopy, energy dispersive spectrometry, X-ray diffraction, nuclear magnetic resonance spectroscopy, extended X-ray absorption fine structure, X-ray absorption near edge structure, chronoamperometry, electrochemical methods and theoretical calculations. Although Ni oxide does not have a pure, simple and crystalline structure, the experiments showed that Ni oxide at a pH of 11 is a water-oxidizing catalyst on the surface of a fluorine-doped tin oxide electrode. At pH 3 or 7, no clear water oxidation or NiOx formation was detected. Below this low pH, a solid with high carbon content was detected, which is not a water-oxidizing catalyst. A metal oxide-based mechanism for water oxidation in the presence of a metal complex has not been considered using theoretical calculations. Herein, our theoretical calculations indicated that after the oxidation of the Ni(II) complex, all Ni equatorial bonds in the oxidation state of III were weakened. This effect may cause the decomposition of the intermediate to NiOx. This study could be very promising for the design and synthesis of new, efficient and stable catalysts.

Graphical abstract: The application of a nickel(ii) Schiff base complex in water oxidation: the importance of nanosized materials

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Mar 2018, accepted on 26 Jun 2018 and first published on 26 Jun 2018


Article type: Paper
DOI: 10.1039/C8CY00582F
Citation: Catal. Sci. Technol., 2018, Advance Article
  •   Request permissions

    The application of a nickel(II) Schiff base complex in water oxidation: the importance of nanosized materials

    H. Feizi, F. Shiri, R. Bagheri, J. P. Singh, K. H. Chae, Z. Song and M. M. Najafpour, Catal. Sci. Technol., 2018, Advance Article , DOI: 10.1039/C8CY00582F

Search articles by author

Spotlight

Advertisements