Abstract
Tailoring material properties of electrode is of great importance because both high activity and durability are required for oxygen reduction electrocatalysts in a fuel cell. However, effective strategy for rational material design should be developed to guarantee stable long-term operation of active electrocatalysts, which unfortunately has been overlooked often. Here, we report an effective strategy of utilizing metal-organic framework (MOF) as precursor for multimetallic alloy nanocrystals. Due to its coordinated metal and N-containing organic molecules, MOF is a highly desirable material to make nanocrystals hybridized with N-doped carbon via simple heat treatment. With delicate selection of composition and controlled heat treatment condition, highly durable and active alloy nanoparticles were successfully derived and showed excellent electrochemical stability in oxygen reduction reaction. This strategy was also extended to other electrocatalysis too, where alloy nanocrystals coated in the N-doped carbon layers shows excellent durability for long term operation. Through this study, we highlight the rational design for highly durable and active electrocatalysts.
Published Version
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