Outside Front Cover: Adaptive Hydrogenation of Alkynes Using CO as a Molecular Trigger to Selectively Produce Alkanes or Z ‐Alkenes

One Catalyst, Two Reactivities: CO makes the Switch and Enables Adaptivity. Supported palladium nanoparticles adapt to their environment to hydrogenate alkynes to alkanes under H2, and to Z-alkenes upon incorporation of CO. The CO-triggered selectivity switch is fully reversible, rapid, and robust, and enables adaptive hydrogenation of 37 structurally diverse alkynes to valuable bioactive and pharmaceutical intermediates. In the Research Article e9302519, Walter Leitner, Alexis Bordet, and co-workers. Artwork by Dr. Johannes Zenner.