Imperial College London
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ProfessorBaptisteGault

Faculty of Engineering, Department of Materials

Professor of Atomic-Scale Characterization
 
 
 
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Contact

 

b.gault

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kim:2022:10.1021/jacs.1c11680,
author = {Kim, S-H and Yoo, S-H and Chakraborty, P and Jeong, J and Lim, J and El-Zoka, AA and Zhou, X and Stephenson, LT and Hickel, T and Neugebauer, J and Scheu, C and Todorova, M and Gault, B},
doi = {10.1021/jacs.1c11680},
journal = {Journal of the American Chemical Society},
pages = {987--994},
title = {Understanding alkali contamination in colloidal nanomaterials to unlock grain boundary impurity engineering},
url = {http://dx.doi.org/10.1021/jacs.1c11680},
volume = {144},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Metal nanogels combine a large surface area, a high structural stability, and a high catalytic activity toward a variety of chemical reactions. Their performance is underpinned by the atomic-level distribution of their constituents, yet analyzing their subnanoscale structure and composition to guide property optimization remains extremely challenging. Here, we synthesized Pd nanogels using a conventional wet chemistry route, and a near-atomic-scale analysis reveals that impurities from the reactants (Na and K) are integrated into the grain boundaries of the poly crystalline gel, typically loci of high catalytic activity. We demonstrate that the level of impurities is controlled by the reaction condition. Based on ab initio calculations, we provide a detailed mechanism to explain how surface-bound impurities become trapped at grain boundaries that form as the particles coalesce during synthesis, possibly facilitating their decohesion. If controlled, impurity integration into grain boundaries may offer opportunities for designing new nanogels.
AU  - Kim,S-H
AU  - Yoo,S-H
AU  - Chakraborty,P
AU  - Jeong,J
AU  - Lim,J
AU  - El-Zoka,AA
AU  - Zhou,X
AU  - Stephenson,LT
AU  - Hickel,T
AU  - Neugebauer,J
AU  - Scheu,C
AU  - Todorova,M
AU  - Gault,B
DO  - 10.1021/jacs.1c11680
EP  - 994
PY  - 2022///
SN  - 0002-7863
SP  - 987
TI  - Understanding alkali contamination in colloidal nanomaterials to unlock grain boundary impurity engineering
T2  - Journal of the American Chemical Society
UR  - http://dx.doi.org/10.1021/jacs.1c11680
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000741117600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://pubs.acs.org/doi/10.1021/jacs.1c11680
UR  - http://hdl.handle.net/10044/1/104230
VL  - 144
ER  -
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