Interface Coordination Engineering of P-FeO/Fe@C Derived from an Iron-Based Metal Organic Framework for pH-Universal Water Splitting.

Developing electrocatalysts with high energy conversion efficiency is urgently needed. In this work, P-FeO/Fe@C electrodes with rich under-coordinated Fe atom interfaces are constructed for efficient pH-universal water splitting. The introduction of under-coordinated Fe atoms into the P-FeO/Fe@C interface can increase the local charge density and polarize the 3d orbital lone electrons, which promotes water adsorption and activation to release more H, thus elevating electrocatalytic activity.