An Efficient Turing‐Type Ag ₂ Se‐CoSe ₂ Multi‐Interfacial Oxygen‐Evolving Electrocatalyst**

Although the Turing structures, or stationary reaction-diffusion patterns, have received increasing attention in biology and chemistry, making such unusual patterns on inorganic solids is fundamentally challenging. We report a simple cation exchange approach to produce Turing-type Ag2Se CoSe2 nanobelts relied diffusion-driven instability. The resultant Ag2Se-CoSe2 material highly effective catalyze oxygen evolution reaction (OER) alkaline electrolytes with an 84.5 % anodic energy efficiency. Electrochemical measurements show that intrinsic OER activity correlates linearly length of interfaces, determining interfaces are more active sites for OER. Combing X-ray absorption computational simulations, we ascribe excellent performance optimized adsorption energies critical oxygen-containing intermediates at unconventional interfaces.