Embedded high density metal nanoparticles with extraordinary thermal stability derived from guest-host mediated layered double hydroxides

Meng Qiang Zhao, Qiang Zhang, Wei Zhang, Jia Qi Huanag, Yinghao Zhang, Dang Sheng Su, Fei Wei

Research output: Contribution to journalArticlepeer-review

182 Scopus citations

Abstract

A chemical precursor mediated process was used to form catalyst nanoparticles (NPs) with an extremely high density (1014 to 10 16 m-2), controllable size distribution (3-20 nm), and good thermal stability at high temperature (900 °C). This used metal cations deposited in layered double hydroxides (LDHs) to give metal catalyst NPs by reduction. The key was that the LDHs had their intercalated anions selected and exchanged by guest-host chemistry to prevent sintering of the metal NPs, and there was minimal sintering even at 900 °C. Metal NPs on MoO 42- intercalated Fe/Mg/Al LDH flakes were successfully used as the catalyst for the double helix growth of single-walled carbon nanotube arrays. The process provides a general method to fabricate thermally stable metal NPs catalysts with the desired size and density for catalysis and materials science.

Original languageEnglish (US)
Pages (from-to)14739-14741
Number of pages3
JournalJournal of the American Chemical Society
Volume132
Issue number42
DOIs
StatePublished - Oct 27 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry

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