Introducing a layer of gold alloy between the outer platinum shell and palladium core of a nanoparticle improves its activity as a catalyst for oxygen reduction.
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References
Xing, Y. et al. Enhancing oxygen reduction reaction activity via Pd-Au alloy sublayer mediation of Pt monolayer electrocatalysts. J. Phys. Chem. Lett. 1, 3238–3242 (2010).
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Armstrong, G. An extra layer. Nature Chem (2010). https://doi.org/10.1038/nchem.925
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DOI: https://doi.org/10.1038/nchem.925