Issue 28, 2020

Rational design of marigold-shaped composite Ni3V2O8 flowers: a promising catalyst for the oxygen evolution reaction

Abstract

Advancement of double spinel-type blended metal oxides and designing heterostructured nanomaterials with assorted shapes using two different metals remains an active area of research. In this work, we designed marigold flower-shaped Ni3V2O8 structures by simple and facile thermal decay of Ni(II) 8-hydroxyquinoline and VO(II) 8-hydroxyquinoline molecular precursors using a universal and green solvent, water. The marigold flower-shaped structure of Ni3V2O8 was characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Finally, we tested these marigold flower-shaped Ni3V2O8 structures for their electrochemical performance, such as the oxygen evolution reaction (OER). The results demonstrated that the marigold flower-shaped Ni3V2O8 structure has superior catalytic activity (overpotential of 328 mV at 10 mA cm−2 and a Tafel slope of 61 mV dec−1) compared with a physical mixture of V2O5 and NiO (overpotential of 496 mV at 10 mA cm−2 and a Tafel slope of 158 mV dec−1), pure NiO (overpotential of 553 mV at 10 mA cm−2 and a Tafel slope of 205 mV dec−1) or V2O5 (overpotential of 668 mV at 10 mA cm−2 and a Tafel slope of 314 mV dec−1) in alkaline medium. This higher OER activity of the marigold flower-shaped Ni3V2O8 structure strengthens its adoption as a potential candidate in the field of energy storage and conversion systems.

Graphical abstract: Rational design of marigold-shaped composite Ni3V2O8 flowers: a promising catalyst for the oxygen evolution reaction

Supplementary files

Article information

Article type
Paper
Submitted
31 Mar 2020
Accepted
17 Jun 2020
First published
18 Jun 2020

New J. Chem., 2020,44, 12256-12265

Rational design of marigold-shaped composite Ni3V2O8 flowers: a promising catalyst for the oxygen evolution reaction

R. Biswas, A. Kundu, M. Saha, V. Kaur, B. Banerjee, R. S. Dhayal, R. A. Patil, Y. Ma, T. Sen and K. K. Haldar, New J. Chem., 2020, 44, 12256 DOI: 10.1039/D0NJ01596B

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