Publications

BibTex format

@article{Duarte:2020:10.1149/ma2020-02533860mtgabs,
author = {Duarte, R and Rao, R and Durrant, J and Stephens, I and Ryan, M and M, Bonastre A and Sharman, J},
doi = {10.1149/ma2020-02533860mtgabs},
journal = {ECS Meeting Abstracts},
pages = {3860--3860},
title = {Towards Active and Stable Bifunctional NiCo<sub>2</sub>O<sub>4</sub> Catalysts for O<sub>2</sub> Evolution and Reduction in Alkaline Media},
url = {http://dx.doi.org/10.1149/ma2020-02533860mtgabs},
volume = {MA2020-02},
year = {2020}
}

Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - <jats:p>  It is particularly challenging to find a bifunctional catalyst capable of accelerating both the O<jats:sub>2</jats:sub> evolution reaction (OER) and O<jats:sub>2</jats:sub> reduction reaction (ORR) in aqueous solutions. The discovery of such a material would bring reversible fuel cells and metal air batteries much closer to technological fruition. However, in a real device, such a catalyst will need to retain its activity across an enormous potential window of at least 1 V over several years. To the best of our knowledge, little is known about the factors controlling the stability of bifunctional catalysts.</jats:p>               <jats:p>In this contribution, we investigate the electrochemical activity and stability of a NiCo<jats:sub>2</jats:sub>O<jats:sub>4 </jats:sub>catalyst, synthesized at Johnson Matthey as part of EU funded project FLOWCAMP. Using post-mortem techniques, such as inductively coupled plasma mass spectrometry (ICP-MS), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), we provide experimental evidence about catalyst deactivation mechanisms. Results will also include a spectroelectrochemical in-situ UV-Vis study, that provides insights to the reaction mechanism for the OER. Lastly, the activity and stability of NiCo<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub> catalysts is also evaluated in oxygen-electrode prototypes and characterized in a half-cell configuration.</jats:p>               <jats:p>In figure 1 is shown the ORR and OER activity of NiCo<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub> before and after accelerated degradation tests (ADT), in rotating disk electrode (RDE) configuration, employing three different electrochemical potential windows: <jats:italic>i)</jats:italic> 0.6 V<jats:sub>RHE</jats:sub> - 1 V<jats:sub>RHE</jats:sub>; &l
AU  - Duarte,R
AU  - Rao,R
AU  - Durrant,J
AU  - Stephens,I
AU  - Ryan,M
AU  - M,Bonastre A
AU  - Sharman,J
DO  - 10.1149/ma2020-02533860mtgabs
EP  - 3860
PY  - 2020///
SP  - 3860
TI  - Towards Active and Stable Bifunctional NiCo<sub>2</sub>O<sub>4</sub> Catalysts for O<sub>2</sub> Evolution and Reduction in Alkaline Media
T2  - ECS Meeting Abstracts
UR  - http://dx.doi.org/10.1149/ma2020-02533860mtgabs
VL  - MA2020-02
ER  -

Download

Prof. Ifan E. L. Stephens

Contact

Location

Summary

Citation

BibTex format

RIS format (EndNote, RefMan)