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Slowing Sintering to Increase the Lifetime of Cu Nanoparticles on Metal Oxide Supports

Rasera, Fabio ; Thill, Alisson S. ; Matte, Lívia P. ; Girotto, Gustavo Z. LU orcid ; Casara, Helena V. ; Della Mea, Guilherme B. ; Balzaretti, Naira M. ; Poletto, Fernanda ; Brito, Carolina and Bernardi, Fabiano (2023) In ACS Applied Nano Materials 6(7). p.6435-6443
Abstract

The development of thermally stable nanoparticles is of utmost importance for applications like catalysis. In particular, Cu nanoparticles supported on metal oxides are easily deactivated under thermal treatments at low temperatures by sintering of the Cu nanoparticles. The formation of thermally stable nanoparticles is typically obtained with secondary drawbacks. In this study, an alternative method for avoiding sintering of Cu nanoparticles is proposed. The method is based on the impregnation of dithiol molecules at the metal oxide support before supporting the Cu nanoparticles. The dithiol molecules are able to avoid the Cu nanoparticle diffusion, thus decreasing the coalescence rate. Furthermore, the Cu nanoparticles are not... (More)

The development of thermally stable nanoparticles is of utmost importance for applications like catalysis. In particular, Cu nanoparticles supported on metal oxides are easily deactivated under thermal treatments at low temperatures by sintering of the Cu nanoparticles. The formation of thermally stable nanoparticles is typically obtained with secondary drawbacks. In this study, an alternative method for avoiding sintering of Cu nanoparticles is proposed. The method is based on the impregnation of dithiol molecules at the metal oxide support before supporting the Cu nanoparticles. The dithiol molecules are able to avoid the Cu nanoparticle diffusion, thus decreasing the coalescence rate. Furthermore, the Cu nanoparticles are not poisoned during thermal treatments. A simple model is proposed and numerically studied to estimate the minimal concentration of dithiol necessary to avoid sintering of the nanoparticles. The method is not complex, and there is no interference on the original Cu nanoparticles properties. It opens possibilities for widening the lifespan of metal nanoparticles supported on metal oxides.

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author
; ; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
catalysis, Cu nanoparticles, dithiol, poisoning, sintering
in
ACS Applied Nano Materials
volume
6
issue
7
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85151818674
ISSN
2574-0970
DOI
10.1021/acsanm.3c01092
language
English
LU publication?
no
additional info
Publisher Copyright: © 2023 American Chemical Society
id
82a5442f-91d6-4b34-888d-719ea5337c7e
date added to LUP
2025-10-10 12:48:31
date last changed
2025-10-17 13:35:16
@article{82a5442f-91d6-4b34-888d-719ea5337c7e,
  abstract     = {{<p>The development of thermally stable nanoparticles is of utmost importance for applications like catalysis. In particular, Cu nanoparticles supported on metal oxides are easily deactivated under thermal treatments at low temperatures by sintering of the Cu nanoparticles. The formation of thermally stable nanoparticles is typically obtained with secondary drawbacks. In this study, an alternative method for avoiding sintering of Cu nanoparticles is proposed. The method is based on the impregnation of dithiol molecules at the metal oxide support before supporting the Cu nanoparticles. The dithiol molecules are able to avoid the Cu nanoparticle diffusion, thus decreasing the coalescence rate. Furthermore, the Cu nanoparticles are not poisoned during thermal treatments. A simple model is proposed and numerically studied to estimate the minimal concentration of dithiol necessary to avoid sintering of the nanoparticles. The method is not complex, and there is no interference on the original Cu nanoparticles properties. It opens possibilities for widening the lifespan of metal nanoparticles supported on metal oxides.</p>}},
  author       = {{Rasera, Fabio and Thill, Alisson S. and Matte, Lívia P. and Girotto, Gustavo Z. and Casara, Helena V. and Della Mea, Guilherme B. and Balzaretti, Naira M. and Poletto, Fernanda and Brito, Carolina and Bernardi, Fabiano}},
  issn         = {{2574-0970}},
  keywords     = {{catalysis; Cu nanoparticles; dithiol; poisoning; sintering}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{7}},
  pages        = {{6435--6443}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Nano Materials}},
  title        = {{Slowing Sintering to Increase the Lifetime of Cu Nanoparticles on Metal Oxide Supports}},
  url          = {{http://dx.doi.org/10.1021/acsanm.3c01092}},
  doi          = {{10.1021/acsanm.3c01092}},
  volume       = {{6}},
  year         = {{2023}},
}