Abstract
We report on the effect of lattice strain in three different types of core-shell electrocatalyst particles on their catalytic activity towards the oxygen reduction reaction. We decouple the changes in catalytic activity with respect to a geometrical and an energetic contribution, both of electronic origin.
Highlights
We report on the effect of lattice strain in three different types of core–shell electrocatalyst particles on their catalytic activity towards the oxygen reduction reaction
Most particles exhibit a significant shift of the Pt(111), Pt(200) and Pt(220) reflections towards higher 2y angles compared to the expected positions of Pt and relative to the pure Pt sample, due to the compressive strain arising from Pt being fitted onto a core metal with smaller lattice spacing
By means of the core–shell particle synthesis described in this paper we were capable to demonstrate that the catalytic activity of the resulting nanoparticles can be tuned by surface strain and core material
Summary
We report on the effect of lattice strain in three different types of core–shell electrocatalyst particles on their catalytic activity towards the oxygen reduction reaction. The multifaceted meaning of ‘‘strain’’ and its impact on XRD reflection analysis and secondly, the correlation between strain and catalytic activity for three different core metals.
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