|
Title
|
|
|
|
3D characterization of the structural transformation undergone by Cu@Ag core-shell nanoparticles following CO₂ reduction reaction
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| The increasing use of metallic nanoparticles (NPs) is significantly advancing the field of electrocatalysis. In particular, Cu/Ag bimetallic interfaces are widely used to enhance the electrochemical CO2 reduction reaction (eCO(2)RR) toward CO and, more recently, C-2 products. However, drastic changes in the product distribution and performance when Cu@Ag core-shell configurations are used can often be observed under electrochemical reaction conditions, especially during the first few minutes of the reaction. Possible structural changes that generate these observations remain underexplored; therefore, the structure-property relationship is hardly understood. In this study, we use electron tomography to investigate the structural transformation mechanism of Cu@Ag core-shells NPs during the critical first minutes of the eCO(2)RR. In this manner, we found that the crystallinity of the Cu seed determines whether the formation of a complete and homogeneous Ag shell is possible. Moreover, by tracking the particles' transformations, we conclude that modifications of the Cu-Ag interface and Cu2O enrichment at the surface of the NPs are key factors contributing to the product generation changes. These insights provide a better understanding of how bimetallic core-shell NPs transform under electrochemical conditions. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Chemistry of materials / American Chemical Society. - Washington, D.C., 1989, currens
| |
|
Publication
|
|
|
|
Washington, D.C.
:
2023
| |
|
ISSN
|
|
|
|
0897-4756
[print]
1520-5002
[online]
| |
|
DOI
|
|
|
|
10.1021/ACS.CHEMMATER.3C00649
| |
|
Volume/pages
|
|
|
|
35
:17
(2023)
, p. 6682-6691
| |
|
ISI
|
|
|
|
001061530700001
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|
Full text (publisher's version - intranet only)
|
|
|
|
| |
|