A strategy to maximize the metal‐oxide interfaces is proposed by coating confined nanoparticles with an ultrathin oxide layer. The main features of the designed catalyst are: Al2O3 nanotubes, confined Pt nanoparticles, and ultrathin Al2O3 coats. These features are represented in the cover‐page graphic. The Pt nanoparticles (yellow ball) were partially embedded in the internal wall of the Al2O3 nanotubes (gray cylindrical tube) and uniformly coated by the ultrathin Al2O3 layer (gray ball). More information can be found in the Communication by Z. Gao, Y. Qin et al. on page 8438 ff.