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Issue 5, 2014
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Morphology-dependent nanocatalysts: Rod-shaped oxides

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Abstract

Nanocatalysts are characterised by the unique nanoscale properties that originate from their highly reduced dimensions. Extensive studies over the past few decades have demonstrated that the size and shape of a catalyst particle on the nanometre scale profoundly affect its reaction performance. In particular, controlling the catalyst particle morphology allows a selective exposure of a larger fraction of the reactive facets on which the active sites can be enriched and tuned. This desirable surface coordination of catalytically active atoms or domains substantially improves catalytic activity, selectivity, and stability. This phenomenon is called morphology-dependent nanocatalysts: catalyst particles with anisotropic morphologies on the nanometre scale greatly affect the reaction performance by selectively exposing the desired facets. In this review, we highlight important progress in morphology-dependent nanocatalysts based on the use of rod-shaped metal oxides with characteristic redox and acid–base features. The correlation between the catalytic properties and the exposed facets verifies the chemical nature of the morphology effect. Moreover, we provide an overview of the interactions between the rod-shaped oxides and the metal nanoparticles in metal-oxide catalyst systems, involving crystal-facet-selective deposition of metal particles onto different crystal facets in the oxide supports. A fundamental understanding of active sites in morphologically tuneable oxides enclosed by the desired reactive facets is expected to direct the development of highly efficient nanocatalysts.

Graphical abstract: Morphology-dependent nanocatalysts: Rod-shaped oxides

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Publication details

The article was received on 09 Aug 2013 and first published on 20 Dec 2013


Article type: Review Article
DOI: 10.1039/C3CS60296F
Citation: Chem. Soc. Rev., 2014,43, 1543-1574
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    Morphology-dependent nanocatalysts: Rod-shaped oxides

    Y. Li and W. Shen, Chem. Soc. Rev., 2014, 43, 1543
    DOI: 10.1039/C3CS60296F

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