TY - JOUR
T1 - Surface composition of silver nanocubes and their influence on morphological stabilization and catalytic performance in ethylene epoxidation
AU - Sangaru, Shiv
AU - Zhu, Haibo
AU - Rosenfeld, Devon C.
AU - Samal, Akshaya Kumar
AU - Anjum, Dalaver H.
AU - Basset, Jean-Marie
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2015/12/18
Y1 - 2015/12/18
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/583401
UR - http://pubs.acs.org/doi/10.1021/acsami.5b09927
UR - http://www.scopus.com/inward/record.url?scp=84952918550&partnerID=8YFLogxK
U2 - 10.1021/acsami.5b09927
DO - 10.1021/acsami.5b09927
M3 - Article
C2 - 26637009
SN - 1944-8244
VL - 7
SP - 28576
EP - 28584
JO - ACS Applied Materials & Interfaces
JF - ACS Applied Materials & Interfaces
IS - 51
ER -