Title

Shape-Dependent Catalytic Oxidation Of 2-Butanol Over Pt Nanoparticles Supported On Γ-Al2O3

Keywords

Al O 2 3; butanol oxidation; butanone; CO 2; EXAFS; Pt nanoparticle; shape control; size effects

Abstract

This study illustrates the effect of nanoparticle (NP) shape on the reactivity of size-selected Pt/γ-Al2O3 nanocatalysts for 2-butanol oxidation. Nanoparticles similar in size [transmission electron microscopy (TEM) diameter of ∼1 nm] but with different shapes were prepared via encapsulation in inverse micelles. The NP shape was resolved by combining information extracted from extended X-ray absorption fine structure spectroscopy (EXAFS) data, TEM, and modeling. A correlation was observed between the average first nearest neighbor coordination number of atoms at the NP surface and their catalytic activity. In particular, the NPs with the largest number of weakly coordinated surface atoms (i.e., edges and corners) were found to be the least active for the total oxidation of 2-butanol. This result highlights that not only size but also shape control must be achieved to tailor the catalytic properties of nanoscale materials. © 2013 American Chemical Society.

Publication Date

1-3-2014

Publication Title

ACS Catalysis

Volume

4

Issue

1

Number of Pages

109-115

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/cs400888n

Socpus ID

84891757860 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84891757860

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