The Front Cover depicts Fe-substituted MoOx yolk–shell catalyst spheres anchored on a conductive substrate under alkaline conditions. Mo atoms (yellow) form the oxide framework, while Fe dopants (blue) induce lattice distortion and oxygen vacancy formation within the structure. These defects promote efficient charge redistribution and activate lattice oxygen species (white) for O–O bond formation, with adsorbed and desorbed oxygen intermediates highlighted by subtle red outlines. The porous yolk–shell architecture exposes abundant active sites, while continuous oxygen bubble evolution indicates improved oxygen evolution performance and durability. More information can be found in the Research Article by D. Park and co-workers (DOI: 10.1002/cssc.202502390).
Kim et al. (Thu,) studied this question.