Abstract
The influence of copper modifying additive on state of gold in NaY and NH4-mordenite has been investigated. The presence of copper in Au/Cu/NM permits to stabilize fine gold particles (∼8 nm), while for Au/Cu/NaY large particles with unusual complex structure and size up to 80 nm were registered. Furthermore, copper favors the formation of gold particles at low temperature. It was revealed the interaction of gold with copper to facilitate the activation of sites at low temperature due to change of redox and electronic properties of gold species. Gold clusters or gold species with strong chemical interaction with copper ions are active in CO oxidation at low temperature being sensitive to sample pretreatment. Gold nanoparticles are active at high temperature and are less sensitive to reaction conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 4256-4259 |
| Number of pages | 4 |
| Journal | Surface Science |
| Volume | 600 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 15 Sep 2006 |
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Keywords
- Additive
- Catalysts
- Clusters
- Copper
- Gold
- Zeolite
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Condensed Matter Physics
- Surfaces and Interfaces
Cite this
Influence of copper modifying additive on state of gold in zeolites. / Smolentseva, E.; Bogdanchikova, N.; Simakov, A.; Pestryakov, A.; Tusovskaya, I.; Avalos, M.; Farías, M. H.; Díaz, J. A.; Gurin, V.
In: Surface Science, Vol. 600, No. 18, 15.09.2006, p. 4256-4259.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influence of copper modifying additive on state of gold in zeolites
AU - Smolentseva, E.
AU - Bogdanchikova, N.
AU - Simakov, A.
AU - Pestryakov, A.
AU - Tusovskaya, I.
AU - Avalos, M.
AU - Farías, M. H.
AU - Díaz, J. A.
AU - Gurin, V.
PY - 2006/9/15
Y1 - 2006/9/15
N2 - The influence of copper modifying additive on state of gold in NaY and NH4-mordenite has been investigated. The presence of copper in Au/Cu/NM permits to stabilize fine gold particles (∼8 nm), while for Au/Cu/NaY large particles with unusual complex structure and size up to 80 nm were registered. Furthermore, copper favors the formation of gold particles at low temperature. It was revealed the interaction of gold with copper to facilitate the activation of sites at low temperature due to change of redox and electronic properties of gold species. Gold clusters or gold species with strong chemical interaction with copper ions are active in CO oxidation at low temperature being sensitive to sample pretreatment. Gold nanoparticles are active at high temperature and are less sensitive to reaction conditions.
AB - The influence of copper modifying additive on state of gold in NaY and NH4-mordenite has been investigated. The presence of copper in Au/Cu/NM permits to stabilize fine gold particles (∼8 nm), while for Au/Cu/NaY large particles with unusual complex structure and size up to 80 nm were registered. Furthermore, copper favors the formation of gold particles at low temperature. It was revealed the interaction of gold with copper to facilitate the activation of sites at low temperature due to change of redox and electronic properties of gold species. Gold clusters or gold species with strong chemical interaction with copper ions are active in CO oxidation at low temperature being sensitive to sample pretreatment. Gold nanoparticles are active at high temperature and are less sensitive to reaction conditions.
KW - Additive
KW - Catalysts
KW - Clusters
KW - Copper
KW - Gold
KW - Zeolite
UR - http://www.scopus.com/inward/record.url?scp=33748931142&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33748931142&partnerID=8YFLogxK
U2 - 10.1016/j.susc.2006.01.153
DO - 10.1016/j.susc.2006.01.153
M3 - Article
VL - 600
SP - 4256
EP - 4259
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 18
ER -