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- W3100120489 abstract "<p>The electroreduction of CO<sub>2 </sub>(CO<sub>2</sub>RR) is a promising strategy towards sustainable fuels. Cu is the only earth-abundant catalyst capable of CO<sub>2</sub>-to-hydrocarbons conversion; yet, its dynamic structure under <i>operando</i> CO<sub>2</sub>RR conditions remains unknown. Here, we track the Cu structure <i>operando</i> by electrochemical scanning tunneling microscopy and Raman spectroscopy. Surprisingly, polycrystalline Cu surfaces reconstruct forming Cu nanocuboids whose size can be controlled by the polarization potential and the time employed in their <i>in-situ</i> synthesis, without the assistance of organic surfactants and-or halide anions. If the Cu-surface is covered by a graphene monolayer, smaller features with enhanced catalytic activity for CO<sub>2</sub>RR can be prepared. The graphene protecting layer soften the 3D morphological changes that Cu-based catalysts suffer when exposed to aggressive electrochemical environments, and allows us to track the kinetic roughening process. This novel strategy is promising for improving Cu long-term stability and, consequently, controlling product selectivity.</p>" @default.
- W3100120489 created "2020-11-23" @default.
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- W3100120489 date "2020-11-09" @default.
- W3100120489 modified "2023-10-17" @default.
- W3100120489 title "Tracking the Potential-Controlled Synthesis of Cu-Nanocuboids and Graphene-Covered Cu-Nanocuboids Under Operando CO2 Electroreduction" @default.
- W3100120489 doi "https://doi.org/10.26434/chemrxiv.13198481.v1" @default.
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