Factors and Dynamics of Cu Nanocrystal Reconstruction under CO2 Reduction

Cu nanocrystals as catalysts for CO2 reduction are a subject of considerable contemporary interest, but their stability has not been considered as extensively. Herein, we report on the reconstruction of Cu nanocrystals during CO2 reduction and discuss the factors influencing the observed changes wit...

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Bibliographic Details
Published in:ACS applied energy materials 2019-11, Vol.2 (11), p.7744-7749
Main Authors: Osowiecki, Wojciech T, Nussbaum, Jasper J, Kamat, Gaurav A, Katsoukis, Georgios, Ledendecker, Marc, Frei, Heinz, Bell, Alexis T, Alivisatos, A. Paul
Format: Article
Language:English
Subjects:
catalyst reconstruction
CO2 reduction
Cu nanocrystals
declustering
identical-location SEM
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
morphological change
particle size distribution
sintering
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Summary:Cu nanocrystals as catalysts for CO2 reduction are a subject of considerable contemporary interest, but their stability has not been considered as extensively. Herein, we report on the reconstruction of Cu nanocrystals during CO2 reduction and discuss the factors influencing the observed changes with computer-based quantitative analysis and spectroscopic techniques. The timelines of opposing phenomena, sintering and declustering, previously reported separately, are detailed with a focus on two forces affecting the final morphology: applied potential and reaction intermediates. This intriguing system demonstrates the need for fundamental understanding of catalyst behavior preceding the ability to control its performance.
ISSN:2574-0962
2574-0962
DOI:10.1021/acsaem.9b01714