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    Surface composition of silver nanocubes and their influence on morphological stabilization and catalytic performance in ethylene epoxidation

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    acsami2E5b09927.pdf
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    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Sangaru, Shiv cc
    Zhu, Haibo
    Rosenfeld, Devon C.
    Samal, Akshaya Kumar cc
    Anjum, Dalaver H. cc
    Basset, Jean-Marie cc
    KAUST Department
    KAUST Catalysis Center (KCC)
    Imaging and Characterization Core Lab
    Date
    2015-12-04
    Permanent link to this record
    http://hdl.handle.net/10754/583401
    
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    Abstract
    Silver nanocubes with exposed (100) facets are reported to have improved selectivity with respect to their spherical counterparts for ethylene epoxidation. In the present study, we observe that the surface composition of the silver nanocubes have also a critical impact on activity. Detailed investigation of the surface composition of silver nanocubes has been carried out using HRTEM, SEM, EDS, EELS and EFTEM. Surfaces of silver nanocubes are “passivated” by chloride and its removal is essential to achieve any catalytic activity. However, the surface chloride is apparently essential for stabilizing the cubic morphology of the particles. Attempts were made to understand the competing effects of the surface species for retaining the morphology of the nanocubes and on their catalytic activity.
    Citation
    Surface composition of silver nanocubes and their influence on morphological stabilization and catalytic performance in ethylene epoxidation 2015 ACS Applied Materials & Interfaces
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    ISSN
    1944-8244
    1944-8252
    DOI
    10.1021/acsami.5b09927
    PubMed ID
    26637009
    Additional Links
    http://pubs.acs.org/doi/10.1021/acsami.5b09927
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.5b09927
    Scopus Count
    Collections
    Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; KAUST Catalysis Center (KCC)

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