Dynamics of bulk and surface oxide evolution in copper foams for electrochemical CO₂ reduction.

ABSTRACT: Oxide-derived copper (OD-Cu) materials exhibit extraordinary catalytic activities in the electrochemical carbon dioxide reduction reaction (CO₂RR), which likely relates to non-metallic material constituents formed in transitions between the oxidized and the reduced material. In time-resolved operando experiment, we track the structural dynamics of copper oxide reduction and its re-formation separately in the bulk of the catalyst material and at its surface using X-ray absorption spectroscopy and surface-enhanced Raman spectroscopy. Surface-species transformations progress within seconds whereas the subsurface (bulk) processes unfold within minutes. Evidence is presented that electroreduction of OD-Cu foams results in kinetic trapping of subsurface (bulk) oxide species, especiall

SUBMITTER: Yang F 

PROVIDER: S-EPMC10978924 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature