Imperial College London
Alternate

Professor David J. Payne

Faculty of Engineering, Department of Materials

Professor of Materials Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 2585d.payne Website

 
 
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Location

 

2.09Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cali:2020:10.1021/acsami.0c08928,
author = {Cali, E and Kerherve, G and Naufal, F and Kousi, K and Neagu, D and Papaioannou, EI and Thomas, MP and Guiton, BS and Metcalfe, IS and Irvine, JTS and Payne, DJ},
doi = {10.1021/acsami.0c08928},
journal = {ACS Applied Materials and Interfaces},
pages = {37444--37453},
title = {Exsolution of catalytically active iridium nanoparticles from strontium titanate},
url = {http://dx.doi.org/10.1021/acsami.0c08928},
volume = {12},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The search for new functional materials that combine high stability and efficiency with reasonable cost and ease of synthesis is critical for their use in renewable energy applications. Specifically in catalysis, nanoparticles, with their high surface-to-volume ratio, can overcome the cost implications associated with otherwise having to use large amounts of noble metals. However, commercialized materials, that is, catalytic nanoparticles deposited on oxide supports, often suffer from loss of activity because of coarsening and carbon deposition during operation. Exsolution has proven to be an interesting strategy to overcome such issues. Here, the controlled emergence, or exsolution, of faceted iridium nanoparticles from a doped SrTiO3 perovskite is reported and their growth preliminary probed by in situ electron microscopy. Upon reduction of SrIr0.005Ti0.995O3, the generated nanoparticles show embedding into the oxide support, therefore preventing agglomeration and subsequent catalyst degradation. The advantages of this approach are the extremely low noble metal amount employed (∼0.5% weight) and the catalytic activity reported during CO oxidation tests, where the performance of the exsolved SrIr0.005Ti0.995O3 is compared to the activity of a commercial catalyst with 1% loading (1% Ir/Al2O3). The high activity obtained with such low doping shows the possibility of scaling up this new catalyst, reducing the high cost associated with iridium-based materials.
AU  - Cali,E
AU  - Kerherve,G
AU  - Naufal,F
AU  - Kousi,K
AU  - Neagu,D
AU  - Papaioannou,EI
AU  - Thomas,MP
AU  - Guiton,BS
AU  - Metcalfe,IS
AU  - Irvine,JTS
AU  - Payne,DJ
DO  - 10.1021/acsami.0c08928
EP  - 37453
PY  - 2020///
SN  - 1944-8244
SP  - 37444
TI  - Exsolution of catalytically active iridium nanoparticles from strontium titanate
T2  - ACS Applied Materials and Interfaces
UR  - http://dx.doi.org/10.1021/acsami.0c08928
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000563074900065&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.acs.org/doi/10.1021/acsami.0c08928
UR  - http://hdl.handle.net/10044/1/83547
VL  - 12
ER  -
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