Grain boundaries in nanocrystalline catalytic materials as a source of surface chemical functionality

Miron V. Landau, Roxana Vidruk, Dmitro Vingurt, David Fuks, Moti Herskowitz

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

This review considers for the first time the effects in heterogeneous catalysis of grain boundaries (GB) created as a result of consolidation of catalytic materials nanoparticles without their sintering. Different methods proposed for quantitative characterization of nanoparticles consolidation extent were considered together with theoretical basis for increasing of catalytic activity at the GB surface areas between consolidated nanocrystals of metals and metal oxides. The review systemizes the GB effects observed in different areas of heterogeneous catalysis implementing metallic and oxide catalysts with acidic, basic, and redox surface functionality. The review analyzed experimental data thatdemonstrated the fine details of the structure of GB's. Their contribution to improving the performance of catalytic materials should be accounted for in development of novel catalysts and deeper understanding of catalysts functioning.

Original languageEnglish
Pages (from-to)379-401
Number of pages23
JournalReviews in Chemical Engineering
Volume30
Issue number4
DOIs
StatePublished - 1 Aug 2014

Keywords

  • catalysts
  • chemical functionality
  • grain boundaries
  • nanocrystalline materials

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