Controlled Self‐Assembly of Hollow Core‐Shell FeMn/CoNi Prussian Blue Analogs with Boosted Electrocatalytic Activity

). Such an impressive performance is endowed by the rational compositional and structural design with optimized electronic structures as well as an increase in exposed active sites. This work provides a robust, cost-effective pathway that enables chemical and morphological control in creating high-performance catalysts for water electrolysis.