Absence of Oxidized Phases in Cu under CO Reduction Conditions

Soren B. Scott, Thomas V. Hogg, Alan T. Landers, Thomas Maagaard, Erlend Bertheussen, John C. Lin, Ryan C. Davis, Jeffrey W. Beeman, Drew Higgins, Walter S. Drisdell, Christopher Hahn, Apurva Mehta, Brian Seger, Thomas F. Jaramillo, Ib Chorkendorff
Year of publication: 
ACS Energy Letters

By live-monitoring Cu and Cu2O Bragg peaks from the surface of a polycrystalline Cu electrode while scanning from open-circuit potential to CO reduction potentials, we show that the near-surface region is fully converted to the metallic phase at approximately +0.3 V vs RHE.

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