Engineering Location and Supports of Atomically Ordered L10‐PdFe Intermetallics for Ultra‐Anticorrosion Electrocatalysis

Abstract Exploring efficient Pd‐based materials with anticorrosion performance in acidic medium is still challenging for electrocatalysis. Herein, yolk‐shell L1 0 ‐PdFe@C nanoreactors are constructed to enhance the anticorrosive performance and activity toward oxygen reduction reaction (ORR). Benefited from engineering supports and location of L1 0 ‐PdFe nanoparticles, the stability toward ORR is significantly improved during accelerated degradation tests (ADT) in both acidic and alkaline mediums, outperforming that of state‐of‐the‐art Pt/C catalysts. As evidenced by the structural characterizations, the active Pd sites in porous L1 0 ‐PdFe@C nanoreactors are well reserved with structure ordered PdFe intermetallics and redeposited Pd nanoparticles, while carbon supported Pd/C and PdFe/C nanoparticles go through severe corrosion and growth after ADT. This work provides a strategy to enhance the durability of catalysts through combining the merits of nanoreactors and ordered intermetallics.