Multimetallic Core/Interlayer/Shell Nanostructures as Advanced Electrocatalysts

Journal Article · Wed Nov 12 04:00:00 EST 2014 · Nano Letters

DOI:https://doi.org/10.1021/nl5028205· OSTI ID:1357036

Kang, Yijin; Snyder, Joshua; Chi, Miaofang; Li, Dongguo; More, Karren L.; Markovic, Nenad M.; Stamenkovic, Vojislav R.

The fine balance between activity and durability is crucial for the development of high performance electrocatalysts. The importance of atomic structure and compositional gradients is a guiding principle in exploiting the knowledge from well-defined materials in the design of novel electrocatalysts with a Ni core, Au interlayer and PtNi shell nanostructure (Ni@Au@PtNi). This multimetallic system is found to have the optimal balance of activity and durability due to the synergy between stabilizing effect of subsurface Au and modified electronic structure of surface Pt through interaction with subsurface Ni atoms. The electrocatalysts with Ni@Au@PtNi core-interlayer-shell structure exhibit high intrinsic and mass activities as well as superior durability for the oxygen reduction reaction with less than 10% activity loss after 10,000 potential cycles between 0.6 and 1.1 V vs. the reversible hydrogen electrode.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Fuel Cell Technologies (FCTO)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1357036
• Journal Information: Nano Letters, Journal Name: Nano Letters Journal Issue: 11 Vol. 14; ISSN 1530-6984
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

activity
durability
electrocatalysis
nanoparticle
nanostructure
oxygen reduction reaction