Issue 10, 2022

Thermally driven phase transition of cobalt hydroxide sheets via cobalt oxides to cobalt nanoparticles

Abstract

Transition metal oxides, which include many stoichiometric variations, are formed into various crystal structures by the atomic arrangement of cations and anions according to stoichiometric composition and are used for a wide range of applications based on this. Among them, cobalt oxide, which has wide crystal structures depending on the lattice points of the anion and the valence of the Co cation, from its hydroxide formula, is attracting a lot of attention due to its interesting catalytic properties due to its crystal structure. In this study, using the synthesized Co(OH)2 nanosheets, the real-time behavior of the phase transition that occurs when continuous heat is applied to the sample has been systematically analyzed using an aberration-corrected scanning transmission electron microscope. The layered Co(OH)2 phase passes through hexagonal CoO and cubic CoO phases to finally become Co nanoparticles, but when the temperature is dropped in the hexagonal phase, spinel Co3O4 is formed. These results suggest that various phases included in transition metal oxides can be selectively implemented according to temperature range control.

Graphical abstract: Thermally driven phase transition of cobalt hydroxide sheets via cobalt oxides to cobalt nanoparticles

Associated articles

Supplementary files

Article information

Article type
Communication
Submitted
03 май 2022
Accepted
25 июл 2022
First published
26 июл 2022

Nanoscale Horiz., 2022,7, 1210-1216

Thermally driven phase transition of cobalt hydroxide sheets via cobalt oxides to cobalt nanoparticles

A. Yoon, G. Kim, M. Lee, Z. Lee and G. H. Ryu, Nanoscale Horiz., 2022, 7, 1210 DOI: 10.1039/D2NH00218C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements