Title

Solving The Structure Of Size-Selected Pt Nanocatalysts Synthesized By Inverse Micelle Encapsulation

Abstract

The structure, size, and shape of γ-Al2O 3-supported Pt nanoparticles (NPs) synthesized by inverse micelle encapsulation have been resolved via a synergistic combination of imaging and spectroscopic tools. It is shown that this synthesis method leads to 3D NP shapes even for subnanometer clusters, in contrast to the raft-like structures obtained for the same systems via traditional deposition-precipitation methods. Furthermore, a high degree of atomic ordering is observed for the micellar NPs in H2 atmosphere at all sizes studied, possibly due to H-induced surface reconstruction in these high surface area clusters. Our findings demonstrate that the influence of NP/support interactions on NP structure can be diminished in favor of NP/adsorbate interactions when NP catalysts are prepared by micelle encapsulation methods. © 2010 American Chemical Society.

Publication Date

6-30-2010

Publication Title

Journal of the American Chemical Society

Volume

132

Issue

25

Number of Pages

8747-8756

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/ja101997z

Socpus ID

77953900064 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77953900064

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