Nanoscale Engineering of Efficient Oxygen Reduction Electrocatalysts by Tailoring the Local Chemical Environment of Pt Surface Sites
Citations Over TimeTop 10% of 2016 papers
Abstract
The oxygen reduction reaction is the limiting half-reaction in hydrogen fuel cells. While Pt is the most active single component electrocatalyst for the reaction, it is hampered by high cost and low reaction rates. Most research to overcome these limitations has focused on Pt/3d alloys, which offer higher rates and lower cost. Herein, we have synthesized, characterized, and tested alloy materials belonging to a multilayer family of electrocatalysts. The multilayer alloy materials contain an AuCu alloy core of precise composition, surrounded by Au layers and covered by a catalytically active Pt surface layer. Their performance relative to that of the commercial Pt standards reaches up to 4 times improved area-specific activity. Characterization studies support the hypothesis that the activity improvement originates from a combination of Au–Pt ligand effects and local strain effects manipulated through the AuCu alloy core. The presented approach to control the strain and ligand effects in the synthesis of Pt-based alloys for the ORR is very general and could lead to promising alloy materials.
Related Papers
- → Pt nanoparticle and Fe,N-codoped 3D graphene as synergistic electrocatalyst for oxygen reduction reaction(2016)32 cited
- → A highly efficient PtCo/C electrocatalyst for the oxygen reduction reaction(2016)20 cited
- → A Hybrid Hydrogel Approach for the Design of N, S Dual-Doped Porous Carbon Electrocatalyst for Oxygen Reduction Reaction(2024)5 cited
- → Ru decorated Pt2CoNi/C nanoparticles as a proficient electrocatalyst for oxygen reduction reaction(2022)8 cited
- → An Excellent Electrocatalysis of Novel Pt-TaOx Composite Electrocatalysts for Oxygen Reduction Reaction(2012)