Surface composition of silver nanocubes and their influence on morphological stabilization and catalytic performance in ethylene epoxidation
Rosenfeld, Devon C.
Samal, Akshaya Kumar
Anjum, Dalaver H.
KAUST DepartmentChemical Science Program
Imaging and Characterization Core Lab
KAUST Catalysis Center (KCC)
Online Publication Date2015-12-18
Print Publication Date2015-12-30
Permanent link to this recordhttp://hdl.handle.net/10754/583401
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AbstractSilver 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.
CitationSurface composition of silver nanocubes and their influence on morphological stabilization and catalytic performance in ethylene epoxidation 2015 ACS Applied Materials & Interfaces
PublisherAmerican Chemical Society (ACS)