Front Cover: High Performance of Single‐atom Catalyst Pd1/MgO for Semi‐hydrogenation of Acetylene to Ethylene in Excess Ethylene (ChemNanoMat 5/2021)

A MgO‐supported Pd single‐atom catalyst (SAC) was synthesized by ball‐milling and showed good catalytic performance. The strong interaction between Pd atoms and MgO support not only inhibited the aggregation of Pd atoms, but also resulted in a high chemical state of Pd, which may facilitate the adsorption as well as reactivity of acetylene. In addition, the isolated nature of the SAC favors ethylene desorption, giving rise to a high selectivity. This work provided a good example of a highly stable Pd SAC for catalytic semi‐hydrogenation with high efficiency. More information can be found in the Communication by Botao Qiao et al.