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Evidence of a strong effect of defect-free metal oxide supports on Pt nanoparticles

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Abstract

Influence of metal oxide (MO) supports on nanoparticle (NP) catalysts is still under investigation. Theoretical studies demonstrate that active defect sites on the surface of a MO support can affect the structure and activity of metal clusters. In the present work, we show that even defect-free surfaces of MOs can cause considerable restructuring and accumulation of interfacial charges on Pt NPs of size 1 nm (Pt55). Independent of the type of MO support, we find that supported Pt55 behaves like a conductor since the binding energy of a test adsorbate on top of it is similar to that on an intact Pt55. However, adsorption energy at binding sites close to the perimeter of the nanoparticle/support interface can vary by 1.8 eV depending on the distance between the adsorbate and surface cations (possibility of forming ionic bonds) as well as the amount and sign of charges (ionization energy) of interfacial Pt atoms.

Graphical abstract: Evidence of a strong effect of defect-free metal oxide supports on Pt nanoparticles

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Publication details

The article was received on 04 Oct 2016, accepted on 08 Feb 2017, published on 23 Feb 2017 and first published online on 23 Feb 2017


Article type: Paper
DOI: 10.1039/C6NR07816H
Citation: Nanoscale, 2017, Advance Article
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    Evidence of a strong effect of defect-free metal oxide supports on Pt nanoparticles

    A. Moradabadi, S. Ahmadi and P. Kaghazchi, Nanoscale, 2017, Advance Article , DOI: 10.1039/C6NR07816H

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