Front cover image: Pyrolytic non-noble Fe-Nx-C ORR catalysts have shown great application potential in recent years. Understanding the active sites and nature of mass transportation is key to properly design a high-performance catalyst. In article number 10.1002/cey2.136, Chengyong Shu co-workers report novel Fe-N4-C catalyst with single atomic catalytic sites. The monodispersed porous structur...

The study of problems concerning subdivisions graphs has a rich history in extremal combinatorics. Confirming conjecture Burr and Erd?s, Alon proved 1994 that subdivided have linear Ramsey numbers. Later, Alon, Krivelevich Sudakov showed every n-vertex graph with at least ?n2 edges contains 1-subdivision the complete on c?n vertices, resolving another old Erd?s. In this paper we consider direct...