Surface composition of silver nanocubes and their influence on morphological stabilization and catalytic performance in ethylene epoxidation
Type
ArticleAuthors
Sangaru, Shiv
Zhu, Haibo
Rosenfeld, Devon C.
Samal, Akshaya Kumar

Anjum, Dalaver H.

Basset, Jean-Marie

KAUST Department
KAUST Catalysis Center (KCC)Imaging and Characterization Core Lab
Date
2015-12-04Permanent link to this record
http://hdl.handle.net/10754/583401
Metadata
Show full item recordAbstract
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 & InterfacesPublisher
American Chemical Society (ACS)ISSN
1944-82441944-8252
PubMed ID
26637009Additional Links
http://pubs.acs.org/doi/10.1021/acsami.5b09927ae974a485f413a2113503eed53cd6c53
10.1021/acsami.5b09927
Scopus Count
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