Imperial College London
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DrAndreasKafizas

Faculty of Natural Sciences, Department of Chemistry

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 6752a.kafizas Website

 
 
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Location

 

301GMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{He:2018:10.1016/j.ensm.2018.08.020,
author = {He, G and Han, X and Moss, B and Weng, Z and Gadipelli, S and Lai, F and Kafizas, AG and Brett, DJL and Guo, ZX and Wang, H and Parkin, IP},
doi = {10.1016/j.ensm.2018.08.020},
journal = {Energy Storage Materials},
pages = {380--387},
title = {Solid solution nitride/carbon nanotube hybrids enhance electrocatalysis of oxygen in zinc-air batteries},
url = {http://dx.doi.org/10.1016/j.ensm.2018.08.020},
volume = {15},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - He,G
AU  - Han,X
AU  - Moss,B
AU  - Weng,Z
AU  - Gadipelli,S
AU  - Lai,F
AU  - Kafizas,AG
AU  - Brett,DJL
AU  - Guo,ZX
AU  - Wang,H
AU  - Parkin,IP
DO  - 10.1016/j.ensm.2018.08.020
EP  - 387
PY  - 2018///
SN  - 2405-8297
SP  - 380
TI  - Solid solution nitride/carbon nanotube hybrids enhance electrocatalysis of oxygen in zinc-air batteries
T2  - Energy Storage Materials
UR  - http://dx.doi.org/10.1016/j.ensm.2018.08.020
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000449521500041&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/64653
VL  - 15
ER  -
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