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Shapeshifting Nanocatalyst for CO2 Conversion.

Girotto, Gustavo Zottis LU orcid ; Jaugstetter, Maximilian ; Kim, Dongwoo ; Matte, Lívia P ; Mishra, Tara P ; Scott, Mary ; Martins, Ruan M ; Muniz, André R ; Salmeron, Miquel and Nemsak, Slavomir , et al. (2025) In Advanced Materials p.09814-09814
Abstract

The conversion of CO
2 into high-value chemicals through a photoreduction reaction in water is a promising route to reduce the dependence on fossil fuels. Enhancing selectivity toward hydrocarbons or alcohols can be achieved by Ag-Cu alloys. However, the stabilized surface state created by Ag-Cu interactions is still poorly understood. In this work, multi-modal in situ X-ray experiments reveals underlying mechanisms and the evolution of Ag-Cu nanoparticles under CO
2 reduction reaction (CO
2RR) conditions. Both morphological and chemical changes of Ag and Cu species induced by diffusion mechanics are tracked during nanocatalyst operation. The initial spheroid Ag-Cu nanoparticles are composed of a Cu-rich shell and Ag-rich... (More)

The conversion of CO
2 into high-value chemicals through a photoreduction reaction in water is a promising route to reduce the dependence on fossil fuels. Enhancing selectivity toward hydrocarbons or alcohols can be achieved by Ag-Cu alloys. However, the stabilized surface state created by Ag-Cu interactions is still poorly understood. In this work, multi-modal in situ X-ray experiments reveals underlying mechanisms and the evolution of Ag-Cu nanoparticles under CO
2 reduction reaction (CO
2RR) conditions. Both morphological and chemical changes of Ag and Cu species induced by diffusion mechanics are tracked during nanocatalyst operation. The initial spheroid Ag-Cu nanoparticles are composed of a Cu-rich shell and Ag-rich core. The reduction treatment promotes Ag migration toward the surface. During photocatalytic CO
2 reduction reaction, Cu atoms migrate back to the surface, forming Ag-Cu-O species. The study observes the surface oxidation of Cu(0) to Cu
+ and the presence of Ag at the sub-surface region. Furthermore, nanoparticles change their shape, decreasing their specific surface area, driven by Cu diffusion during the CO
2 photoreduction reaction. The results provide invaluable insights into the dynamic restructuring of the catalyst under reaction conditions and into the active species responsible for CO
2 conversion.

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publishing date
type
Contribution to journal
publication status
epub
in
Advanced Materials
pages
09814 - 09814
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:105016473757
  • pmid:40964934
ISSN
1521-4095
DOI
10.1002/adma.202509814
language
English
LU publication?
no
additional info
© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
id
aee151e4-85e6-49e0-8704-0d8722656b98
date added to LUP
2025-10-10 12:45:35
date last changed
2025-10-25 05:35:09
@article{aee151e4-85e6-49e0-8704-0d8722656b98,
  abstract     = {{<p>The conversion of CO<br>
 2 into high-value chemicals through a photoreduction reaction in water is a promising route to reduce the dependence on fossil fuels. Enhancing selectivity toward hydrocarbons or alcohols can be achieved by Ag-Cu alloys. However, the stabilized surface state created by Ag-Cu interactions is still poorly understood. In this work, multi-modal in situ X-ray experiments reveals underlying mechanisms and the evolution of Ag-Cu nanoparticles under CO<br>
 2 reduction reaction (CO<br>
 2RR) conditions. Both morphological and chemical changes of Ag and Cu species induced by diffusion mechanics are tracked during nanocatalyst operation. The initial spheroid Ag-Cu nanoparticles are composed of a Cu-rich shell and Ag-rich core. The reduction treatment promotes Ag migration toward the surface. During photocatalytic CO<br>
 2 reduction reaction, Cu atoms migrate back to the surface, forming Ag-Cu-O species. The study observes the surface oxidation of Cu(0) to Cu <br>
 + and the presence of Ag at the sub-surface region. Furthermore, nanoparticles change their shape, decreasing their specific surface area, driven by Cu diffusion during the CO<br>
 2 photoreduction reaction. The results provide invaluable insights into the dynamic restructuring of the catalyst under reaction conditions and into the active species responsible for CO<br>
 2 conversion.<br>
 </p>}},
  author       = {{Girotto, Gustavo Zottis and Jaugstetter, Maximilian and Kim, Dongwoo and Matte, Lívia P and Mishra, Tara P and Scott, Mary and Martins, Ruan M and Muniz, André R and Salmeron, Miquel and Nemsak, Slavomir and Bernardi, Fabiano}},
  issn         = {{1521-4095}},
  language     = {{eng}},
  month        = {{09}},
  pages        = {{09814--09814}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Materials}},
  title        = {{Shapeshifting Nanocatalyst for CO<sub>2</sub> Conversion.}},
  url          = {{http://dx.doi.org/10.1002/adma.202509814}},
  doi          = {{10.1002/adma.202509814}},
  year         = {{2025}},
}