Upgrading carbon dioxide (CO2) and CO2-derived carbon monoxide (CO) to high-value multi-carbon (C2+) products is significant for fuel and feedstock production using copper as the electrocatalysts but suffering poor selectivity of C2+ products. Based on our previous study, the Cu nanosheets, selectively exposed the (111) surface, exhibit an acetate Faradaic efficiency of 48% with an acetate partial current density up to 131 mA cm-2 in electrochemical CO reduction. However, development of Cu-nanosheets-derived catalysts with enhanced activity and selectivity of C2+ products remains a grand challenge. Interface engineering offers great choices for manipulating catalytic active sites. Here, we propose to modulate the selectivity of C2+ products in CO electrolysis via introducing the palladium single sites on to the copper nanosheets. Adding palladium atom on copper nanosheet will bring in (1) geometric effect such as breaking down symmetry, (2) electronic effect manifest the electron transfer between palladium and copper atoms and (3) synergistic effect on the interface that involves two types of adsorption sites for stabilizing oxygenated intermediates, which can reshape the C2+ products distribution in CO electrolysis.

Palladium atomically dispersed on copper nanosheets as a modulator of selectivity in CO electrolysis

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.