BibTex format
@article{Weber:2024:10.1038/s41467-024-54008-4,
author = {Weber, ML and Jennings, D and Fearn, S and Cavallaro, A and Prochazka, M and Gutsche, A and Heymann, L and Guo, J and Yasin, L and Cooper, SJ and Mayer, J and Rheinheimer, W and Dittmann, R and Waser, R and Guillon, O and Lenser, C and Skinner, SJ and Aguadero, A and Nemák, S and Gunkel, F},
doi = {10.1038/s41467-024-54008-4},
journal = {Nature Communications},
title = {Thermal stability and coalescence dynamics of exsolved metal nanoparticles at charged perovskite surfaces},
url = {http://dx.doi.org/10.1038/s41467-024-54008-4},
volume = {15},
year = {2024}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - Exsolution reactions enable the synthesis of oxide-supported metal nanoparticles, which are desirable as catalysts in green energy conversion technologies. It is crucial to precisely tailor the nanoparticle characteristics to optimize the catalysts’ functionality, and to maintain the catalytic performance under operation conditions. We use chemical (co)-doping to modify the defect chemistry of exsolution-active perovskite oxides and examine its influence on the mass transfer kinetics of Ni dopants towards the oxide surface and on the subsequent coalescence behavior of the exsolved nanoparticles during a continuous thermal reduction treatment. Nanoparticles that exsolve at the surface of the acceptor-type fast-oxygen-ion-conductor SrTi0.95Ni0.05O3−δ (STNi) show a high surface mobility leading to a very low thermal stability compared to nanoparticles that exsolve at the surface of donor-type SrTi0.9Nb0.05Ni0.05O3−δ (STNNi). Our analysis indicates that the low thermal stability of exsolved nanoparticles at the acceptor-doped perovskite surface is linked to a high oxygen vacancy concentration at the nanoparticle-oxide interface. For catalysts that require fast oxygen exchange kinetics, exsolution synthesis routes in dry hydrogen conditions may hence lead to accelerated degradation, while humid reaction conditions may mitigate this failure mechanism.
AU - Weber,ML
AU - Jennings,D
AU - Fearn,S
AU - Cavallaro,A
AU - Prochazka,M
AU - Gutsche,A
AU - Heymann,L
AU - Guo,J
AU - Yasin,L
AU - Cooper,SJ
AU - Mayer,J
AU - Rheinheimer,W
AU - Dittmann,R
AU - Waser,R
AU - Guillon,O
AU - Lenser,C
AU - Skinner,SJ
AU - Aguadero,A
AU - Nemák,S
AU - Gunkel,F
DO - 10.1038/s41467-024-54008-4
PY - 2024///
SN - 2041-1723
TI - Thermal stability and coalescence dynamics of exsolved metal nanoparticles at charged perovskite surfaces
T2 - Nature Communications
UR - http://dx.doi.org/10.1038/s41467-024-54008-4
UR - https://www.nature.com/articles/s41467-024-54008-4
VL - 15
ER -