Multimetallic High-Index Faceted Heterostructured Nanoparticles

Liliang Huang, Haixin Lin, Cindy Y. Zheng, Edward J. Kluender, Rustin Golnabi, Bo Shen, Chad A. Mirkin*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Multimetallic heterostructured nanoparticles with high-index facets potentially represent an important class of highly efficient catalysts. However, due to their complexity, they are often difficult to synthesize. Herein, a library of heterostructured, multimetallic (Pt, Pd, Rh, and Au) tetrahexahedral nanoparticles was synthesized through alloying/dealloying with Bi in a tube furnace at 900-1000 °C. Electron microscopy and selected area diffraction measurements show that the domains of the heterostructured nanoparticles are epitaxially aligned. Although nanoparticles formed from Au alone exhibit low-index facets, Pt and Au form PtAu heterostructured nanoparticles with high-index facets, including domains that are primarily made of Au. Furthermore, the alloying/dealloying of Bi occurs at different rates and under different conditions within the heterostructured nanoparticles. This influences the types of architectures observed en route to the final high-index state, a phenomenon clearly observable in the case of PdRhAu nanoparticles. Finally, scanning probe block copolymer lithography was used in combination with this synthetic strategy to control nanoparticle composition in the context of PtAu nanoparticles (1:4 to 4:1 ratio range) and size (15 to 45 nm range).

Original languageEnglish (US)
Pages (from-to)4570-4575
Number of pages6
JournalJournal of the American Chemical Society
Volume142
Issue number10
DOIs
StatePublished - Mar 11 2020

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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    Huang, L., Lin, H., Zheng, C. Y., Kluender, E. J., Golnabi, R., Shen, B., & Mirkin, C. A. (2020). Multimetallic High-Index Faceted Heterostructured Nanoparticles. Journal of the American Chemical Society, 142(10), 4570-4575. https://doi.org/10.1021/jacs.0c00045