He, G;
Han, X;
Moss, B;
Weng, Z;
Gadipelli, S;
Lai, F;
Kafizas, AG;
... Parkin, IP; + view all
(2018)
Solid solution nitride/carbon nanotube hybrids enhance electrocatalysis of oxygen in zinc-air batteries.
Energy Storage Materials
, 15
pp. 380-387.
10.1016/j.ensm.2018.08.020.
Preview |
Text
He VoR 1-s2.0-S2405829718306081-main.pdf - Published Version Download (1MB) | Preview |
Abstract
Bi-functional electrocatalysts capable of both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) are highly desirable for a variety of renewable energy storage and conversion technologies. To develop noble metal alternatives for catalysis, non-noble metal compounds have been tremendously pursued but remain non-ideal to issues relating to stability and population of the number of exposed active sites. Inspired by Engel-Brewer valence bond theory, strongly coupled nickel-cobalt-nitride solid-solution/carbon nanotube hybrids were developed by tuning their bifunctionalities from an atomistic scale. The as-synthesized catalysts demonstrate superior catalytic properties to commercial noble-metal based counterparts, i.e. platinum on a carbon support for ORR and iridium oxide for OER, also with much enhanced stability. First-principle calculations and structural analysis show that the optimized structures potentially possess multiple active sites, both bulk-surface response and separated surface charge distribution from optimization of Ni/Co nitrides could contribute to synergistic effects for improved catalytic performances. This study provides not only unique theoretical insights but also a design concept for producing effective bi-functional catalysts with balanced-ORR/OER active sites for this class of transition metal nitride hybrid system and paves the way for exploring other metal nitrides for similar purposes.
| Type: | Article |
|---|---|
| Title: | Solid solution nitride/carbon nanotube hybrids enhance electrocatalysis of oxygen in zinc-air batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ensm.2018.08.020 |
| Publisher version: | https://doi.org/10.1016/j.ensm.2018.08.020 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Solid solution nitride, Electrocatalyst, Zn-air battery, Computational simulation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10056351 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
