Journal ArticleDOI
Atom-Resolved Imaging of Dynamic Shape Changes in Supported Copper Nanocrystals
Poul L. Hansen,Jakob Birkedal Wagner,Stig Helveg,Jens R. Rostrup-Nielsen,Bjerne S. Clausen,Henrik Topsøe +5 more
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TLDR
In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports, which are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells.Abstract:
In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports. These are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells. The nanocrystals undergo dynamic reversible shape changes in response to changes in the gaseous environment. For zinc oxide-supported samples, the changes are caused both by adsorbate-induced changes in surface energies and by changes in the interfacial energy. For copper nanocrystals supported on silica, the support has negligible influence on the structure. Nanoparticle dynamics must be included in the description of catalytic and other properties of nanomaterials. In situ microscopy offers possibilities for obtaining the relevant atomic-scale insight.read more
Citations
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Journal ArticleDOI
Formation of Effective Copper-Based Catalysts of Methanol Synthesis
TL;DR: In this paper, the regularities of formation of the composition and structure of a highly efficient catalyst for methanol synthesis have been revealed, which was obtained by thermal treatment of the combined CuZnAl(Cr) hydroxocarbonate followed by the reductive activation of the anion-modified zinc oxide precursor.
Journal ArticleDOI
Analysis of carbon nanotube chiralities obtained from a bimetallic Co-Mo catalyst
TL;DR: In this article, a CoMo-acetate solution was used to prepare the catalyst and the absolute diameter range for the SWNT is about 0.7-1.7nm for all samples.
Proceedings ArticleDOI
Special properties of new type carbon-copper core-shell nanoparticles composite material fabricated using biomass as template
TL;DR: A new type of carbon-copper core-shell nanoparticles (CCCSNs) have been fabricated using biomass as template that eliminates the detrimental impacts of conventional engineered nanoparticles usually have and provides the superior properties, including the low cost for fabrication, that conventional copper nanoparticles don't have.
Journal ArticleDOI
Theoretical Investigation of the Size Effect on the Oxygen Adsorption Energy of Coinage Metal Nanoparticles
Amir Hossein Hakimioun,Elisabeth M. Dietze,Bart Vandegehuchte,Daniel Curulla-Ferré,Lennart Joos,Philipp N. Plessow,Felix Studt +6 more
TL;DR: In this paper, the finite size effect on the oxygen adsorption energy of coinage metal (Cu, Ag and Au) cuboctahedral nanoparticles in the size range of 13 to 1415 atoms (0.7-3.5nm in diameter).
References
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Journal ArticleDOI
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Journal ArticleDOI
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