Issue 9, 2019

Optimization of oxygen evolution dynamics on RuO2via controlling of spontaneous dissociation equilibrium

Abstract

The general design strategy for excellent catalysts has been well established by the Sabatier principle, e.g., moderate bond strength between the catalyst surface and the reactant/product. From the viewpoint of reaction kinetics, it is possible to modify the rate determining step through separately accelerating the adsorption and dissociation of intermediate products. In this research, we have demonstrated that OER kinetics for RuO2 could be effectively promoted with the precise control of the reaction kinetics by optimizing the equilibrium of dissociation and recombination of water molecules. It is found that increasing the concentration of OH in the electrolyte contributes to the formation process of the peroxy species, Ru–OOH*, while the increase of temperature is helpful for the deprotonation process from a stabilized configuration of the peroxy species. With faster rate determining steps, RuO2 shows excellent OER activity and stability under high temperature and concentrated basic electrolyte conditions. It is meaningful for accelerating the practical application of hydrogen production from electrolysis of water. And this research will provide a new perspective for the study of catalytic reactions, not just limited to the OER.

Graphical abstract: Optimization of oxygen evolution dynamics on RuO2via controlling of spontaneous dissociation equilibrium

Supplementary files

Article information

Article type
Research Article
Submitted
27 ሜይ 2019
Accepted
17 ጁላይ 2019
First published
17 ጁላይ 2019

Mater. Chem. Front., 2019,3, 1779-1785

Optimization of oxygen evolution dynamics on RuO2via controlling of spontaneous dissociation equilibrium

Y. Sun, L. Yuan, Z. Liu, Q. Wang, K. Huang and S. Feng, Mater. Chem. Front., 2019, 3, 1779 DOI: 10.1039/C9QM00346K

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