Carbon-anchoring synthesis of Pt₁Ni₁@Pt/C core-shell catalysts for stable oxygen reduction reaction.

ABSTRACT: Proton-exchange-membrane fuel cells demand highly efficient catalysts for the oxygen reduction reaction, and core-shell structures are known for maximizing precious metal utilization. Here, we reported a controllable "carbon defect anchoring" strategy to prepare Pt₁Ni₁@Pt/C core-shell nanoparticles with an average size of ~2.6 nm on an in-situ transformed defective carbon support. The strong Pt-C interaction effectively inhibits nanoparticle migration or aggregation, even after undergoing stability tests over 70,000 potential cycles, resulting in only 1.6% degradation. The stable Pt₁Ni₁@Pt/C catalysts have high oxygen reduction reaction mass activity and specific activity that reach 1.424 ± 0.019 A/mg_Pt and 1.554 ± 0.027 mA/cm_Pt</

SUBMITTER: Cui J 

PROVIDER: S-EPMC11530681 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature