The Front Cover picture shows how atomic‐resolution spherical‐aberration‐corrected transmission electron microscopy reveals the presence of a high density of defect sites such as surface atomic steps on the flower‐like Pt‐based particles. These defect sites play an important role in the improved electrocatalytic performance. More information can be found in the Full Paper by C. Zhong and co‐workers on page 537 in Issue 4, 2016 (DOI: 10.1002/celc.201500451).