Demonstration of chemistry at a point through restructuring and catalytic activation at anchored nanoparticles

Dragos Neagu, Evangelos I. Papaioannou, Wan K. W. Ramli, David N. Miller, Billy J. Murdoch, Hervé Ménard, Ahmed Umar, Anders J. Barlow, Peter J. Cumpson, John T. S. Irvine (Lead / Corresponding author), Ian S. Metcalfe (Lead / Corresponding author)

Research output: Contribution to journalArticle

26 Citations (Scopus)
159 Downloads (Pure)

Abstract

Metal nanoparticles prepared by exsolution at the surface of perovskite oxides have been recently shown to enable new dimensions in catalysis and energy conversion and storage technologies owing to their socketed, well-anchored structure. Here we show that contrary to general belief, exsolved particles do not necessarily re-dissolve back into the underlying perovskite upon oxidation. Instead, they may remain pinned to their initial locations, allowing one to subject them to further chemical transformations to alter their composition, structure and functionality dramatically, while preserving their initial spatial arrangement. We refer to this concept as chemistry at a point and illustrate it by tracking individual nanoparticles throughout various chemical transformations. We demonstrate its remarkable practical utility by preparing a nanostructured earth abundant metal catalyst which rivals platinum on a weight basis over hundreds of hours of operation. Our concept enables the design of compositionally diverse confined oxide particles with superior stability and catalytic reactivity.
Original languageEnglish
Pages (from-to)1855
Number of pages1
JournalNature Communications
Volume8
Issue number1
DOIs
Publication statusPublished - 30 Nov 2017

    Fingerprint

Keywords

  • Catalyst synthesis
  • Heterogeneous catalysis
  • Nanoparticles

Cite this

Neagu, D., Papaioannou, E. I., Ramli, W. K. W., Miller, D. N., Murdoch, B. J., Ménard, H., Umar, A., Barlow, A. J., Cumpson, P. J., Irvine, J. T. S., & Metcalfe, I. S. (2017). Demonstration of chemistry at a point through restructuring and catalytic activation at anchored nanoparticles. Nature Communications, 8(1), 1855. https://doi.org/10.1038/s41467-017-01880-y