Unraveling the synergistic effects of Cu-Ag tandem catalysts during electrochemical CO₂ reduction using nanofocused X-ray probes.

ABSTRACT: Controlling the selectivity of the electrocatalytic reduction of carbon dioxide into value-added chemicals continues to be a major challenge. Bulk and surface lattice strain in nanostructured electrocatalysts affect catalytic activity and selectivity. Here, we unravel the complex dynamics of synergistic lattice strain and stability effects of Cu-Ag tandem catalysts through a previously unexplored combination of in situ nanofocused X-ray absorption spectroscopy and Bragg coherent diffraction imaging. Three-dimensional strain maps reveal the lattice dynamics inside individual nanoparticles as a function of applied potential and product yields. Dynamic relations between strain, redox state, catalytic activity and selectivity are derived. Moderate Ag contents effectively reduce the competing e

SUBMITTER: Frisch ML 

PROVIDER: S-EPMC10687089 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature