Journal Article

PUBDB-2024-06369

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Reversible metal cluster formation on Nitrogen-doped carbon controlling electrocatalyst particle size with subnanometer accuracy

Timoshenko, J. (Corresponding author)Extern* ; Rettenmaier, C.Extern* ; Hursán, D. ; Rüscher, M.Extern* ; Ortega, E. ; Herzog, A.Extern* ; Wagner, T.Extern* ; Bergmann, A.Extern* ; Hejral, U.Extern* ; Yoon, A.Extern* ; Martini, A.Extern* ; Liberra, E.Extern* ; Monteiro, M. C. d. O. ; Cuenya, B. R. (Corresponding author)

2024
Nature Publishing Group UK [London]

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Please use a persistent id in citations: doi:10.1038/s41467-024-50379-w  doi:10.3204/PUBDB-2024-06369

Abstract: Copper and nitrogen co-doped carbon catalysts exhibit a remarkable behavior during the electrocatalytic CO$_2$ reduction (CO$_2$RR), namely, the formation of metal nanoparticles from Cu single atoms, and their subsequent reversible redispersion. Here we show that the switchable nature of these species holds the key for the on-demand control over the distribution of CO$_2$RR products, a lack of which has thus far hindered the wide-spread practical adoption of CO$_2$RR. By intermitting pulses of a working cathodic potential with pulses of anodic potential, we were able to achieve a controlled fragmentation of the Cu particles and partial regeneration of single atom sites. By tuning the pulse durations, and by tracking the catalyst’s evolution using operando quick X-ray absorption spectroscopy, the speciation of the catalyst can be steered toward single atom sites, ultrasmall metal clusters or large metal nanoparticles, each exhibiting unique CO$_2$RR functionalities.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. SWEDEN-DESY - SWEDEN-DESY Collaboration (2020_Join2-SWEDEN-DESY) (2020_Join2-SWEDEN-DESY)

Experiment(s):

1. PETRA Beamline P64 (PETRA III)

Appears in the scientific report 2024

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