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| Home > Publications database > Insight into the Carbon Monoxide Reduction Reaction on Cu(111) from Operando Electrochemical X‐ray Photoelectron Spectroscopy |
| Journal Article | PUBDB-2025-04524 |
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2025
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/anie.202506402 doi:10.3204/PUBDB-2025-04524
Abstract: In this work, we introduce a modified dip-and-pull electrochemical X-ray photoelectron spectroscopy (ECXPS) approach that offers new mechanistic insight into the alkaline carbon monoxide reduction reaction (CORR) over a Cu(111) single crystal surface. We tackle two major unresolved questions in the CORR mechanism that persist in the literature. Firstly, we address the mechanism for methane formation on Cu(111) and show that the mechanism likely proceeds via atomic carbon, which subsequently couples, leading to the accumulation of amorphous carbon on the surface. Secondly, we provide insight into whether the mechanism for acetate formation occurs entirely on the surface or partially within the solution phase, showing that acetate is present on the surface, indicating a surface-based reaction. These insights into surface-based mechanisms provide a handle for designing future catalysts that can efficiently target the binding of specific intermediates. Furthermore, we expect that our modified approach to dip-and-pull ECXPS – in which we have changed the electrode geometry, the method of introducing the reactant gas and used hard x-rays – will significantly expand the technique's applicability, enabling studies of the CO($_2$)RR and beyond.
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