Proceedings of nanoGe Fall Meeting 2021 (NFM21)
DOI: https://doi.org/10.29363/nanoge.nfm.2021.174
Publication date: 23rd September 2021
The electrochemical CO2 reduction (CO2RR) driven by electrical energy from renewable sources has attracted attention as an environmentally friendly path to convert the undesired greenhouse gas into feedstock chemicals and fuels. Among the metal catalysts used for CO2RR, copper-based catalysts are of particular interest due to their unique capability to transform CO2 into various hydrocarbons and alcohols with high energy density. However, controlling the selectivity toward a specific product remains a challenge in this field. Interestingly, some of the critical parameters affecting the catalyst’s properties, including its structure and oxidation state, as well as the local pH near the active sites, may be tuned by applying potential pulses during CO2RR.
In this talk, I will discuss the impact of applying potential pulses to well-defined Cu-based materials (e.g. Cu(100), Cu2O nanocubes). In particular, I will establish structure/composition-selectivity correlations based on in depth in situ/operando microscopic (EC-AFM, EC-TEM), spectroscopic (XAS, XPS) and diffraction (XRD) characterization under realistic reaction conditions, including high current densities in flow cell electrolyzers. Thus, this work is expected to set up the ground for steering catalyst selectivity through dynamically-controlled structural and chemical transformations.
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