Alleviating O-Intermediates Adsorption Strength over PdRhCu Ternary Metallene via Ligand Effect for Enhanced Oxygen Reduction in Practical PEMFCs.

Expediting the torpid kinetics of the acidic oxygen reduction reaction (ORR) is a crucial yet formidable challenge toward advancing proton exchange membrane fuel cells (PEMFCs) for commercialization. The cutting-edge Pd-based nanomaterials for acidic ORR are hindered by their low intrinsic activities and significant CO poisoning, stemming from the challenge of simultaneously optimizing surface adsorption toward various adsorbates. Herein, we introduce an ultrathin PdRhCu ternary metallene (PdRhCu metallene) for boosting acidic ORR in PEMFC.