ChemCatChem

Cover image for Vol. 7 Issue 14

Editor: Michael Rowan; Editorial Board Chairs: Uwe Bornscheuer, Luis A. Oro, Bert Weckhuysen

Impact Factor: 4.556

ISI Journal Citation Reports © Ranking: 2014: 31/139 (Chemistry Physical)

Online ISSN: 1867-3899

Associated Title(s): Advanced Synthesis & Catalysis, Angewandte Chemie International Edition, Chemistry - A European Journal, ChemBioChem, ChemElectroChem, ChemPhysChem, ChemSusChem

6_03c/2014Inside Back Cover: Size and Shape-controlled Pd Nanocrystals on ZnO and SiO2: When the Nature of the Support Determines the Active Phase (ChemCatChem 3/2014)

Combined effects for improved catalysis! The cover picture shows the evolution of the active phase of shape-controlled palladium nanocrystals (NCs) during acetylene hydrogenation, depending on the nature of the support. In their Communication on p. 767 ff., M. Crespo-Quesada, S. Yoon et al. show that the structure sensitivity of a chemical reaction is a complex phenomenon that originates from the reconstruction of the Pd-NCs in response to the reactive environment. This reconstruction is sensitive to the support used. Indeed, acetylene hydrogenation is a structure-sensitive reaction [Pd(111) in octahedra is more active than Pd(100) in cubes]. However, the catalytically active and selective palladium carbide (PdCx) phase was readily formed in Pd-NCs on the SiO2 (much faster on Pd cubes than on Pd octahedra), whereas a markedly less active PdZn phase was formed on the ZnO-supported Pd NCs.

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