Gold Nanoparticles for CO 2 Electroreduction: An Optimum Defined by Size and Shape.

Autor: Sedano Varo E; Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark., Egeberg Tankard R; Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark., Kryger-Baggesen J; Center for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark., Jinschek J; Center for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.; National Centre for Nano Fabrication and Characterization, Technical University of Denmark, 2800 Kongens Lyngby, Denmark., Helveg S; Center for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark., Chorkendorff I; Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark., Damsgaard CD; Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.; Center for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.; National Centre for Nano Fabrication and Characterization, Technical University of Denmark, 2800 Kongens Lyngby, Denmark., Kibsgaard J; Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.; Center for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
Jazyk: angličtina
Zdroj: Journal of the American Chemical Society [J Am Chem Soc] 2024 Jan 24; Vol. 146 (3), pp. 2015-2023. Date of Electronic Publication: 2024 Jan 09.
DOI: 10.1021/jacs.3c10610
Abstrakt: Understanding the size-dependent behavior of nanoparticles is crucial for optimizing catalytic performance. We investigate the differences in selectivity of size-selected gold nanoparticles for CO 2 electroreduction with sizes ranging from 1.5 to 6.5 nm. Our findings reveal an optimal size of approximately 3 nm that maximizes selectivity toward CO, exhibiting up to 60% Faradaic efficiency at low potentials. High-resolution transmission electron microscopy reveals different shapes for the particles and suggests that multiply twinned nanoparticles are favorable for CO 2 reduction to CO. Our analysis shows that twin boundaries pin 8-fold coordinated surface sites and in turn suggests that a variation of size and shape to optimize the abundance of 8-fold coordinated sites is a viable path for optimizing the CO 2 electrocatalytic reduction to CO. This work contributes to the advancement of nanocatalyst design for achieving tunable selectivity for CO 2 conversion into valuable products.
Databáze: MEDLINE
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