The Front Cover depicts copper nanoparticles with finely tuned wettability beneath a cut-away electrolyte layer, forming abundant three-phase interfaces where CO₂, protons, and electrons meet. This balance of hydrophilicity and hydrophobicity enriches local CO₂ concentration, boosting activity, selectivity, and stability. For details, see the Concept by T. W. B. Lo, J. Yin, Q. Lei, and co-workers (DOI: 10.1002/cmtd.202400080).