Campus Units

Chemistry, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

2015

Journal or Book Title

Nanoscale

Volume

7

Issue

40

First Page

16721

Last Page

16728

DOI

10.1039/C5NR04614A

Abstract

Metal nanostructures have attracted great attention in various fields due to their tunable properties through precisely tailored sizes, compositions and structures. Using mesoporous silica (mSiO2) as the inorganic capping agent and encapsulated Pt nanoparticles as the seeds, we developed a robust seeded growth method to prepare uniform bimetallic nanoparticles encapsulated in mesoporous silica shells (PtM@mSiO2, M = Pd, Rh, Ni and Cu). Unexpectedly, we found that the inorganic silica shell is able to accommodate an eight-fold volume increase in the metallic core by reducing its thickness. The bimetallic nanoparticles encapsulated in mesoporous silica shells showed enhanced catalytic properties and thermal stabilities compared with those prepared with organic capping agents. This inorganic capping strategy could find a broad application in the synthesis of versatile bimetallic nanostructures with exceptional structural control and enhanced catalytic properties.

Comments

This is a manuscript of an article published as Pei, Yuchen, Raghu V. Maligal-Ganesh, Chaoxian Xiao, Tian-Wei Goh, Kyle Brashler, Jeffrey A. Gustafson, and Wenyu Huang. "An inorganic capping strategy for the seeded growth of versatile bimetallic nanostructures." Nanoscale 7, no. 40 (2015): 16721-16728. doi: 10.1039/C5NR04614A. Posted with permission.

Copyright Owner

The Royal Society of Chemistry

Language

en

File Format

application/pdf

Published Version

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