Abstract
Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).
| Original language | English |
|---|---|
| Pages (from-to) | 977-980 |
| Number of pages | 4 |
| Journal | Catalysis Communications |
| Volume | 8 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 2007 |
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Keywords
- Active sites
- Catalyst
- Gold
- Oxidation
- Zeolite
ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
Cite this
Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation. / Tuzovskaya, I. V.; Simakov, A. V.; Pestryakov, A. N.; Bogdanchikova, N. E.; Gurin, V. V.; Farías, M. H.; Tiznado, H. J.; Avalos, M.
In: Catalysis Communications, Vol. 8, No. 7, 07.2007, p. 977-980.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation
AU - Tuzovskaya, I. V.
AU - Simakov, A. V.
AU - Pestryakov, A. N.
AU - Bogdanchikova, N. E.
AU - Gurin, V. V.
AU - Farías, M. H.
AU - Tiznado, H. J.
AU - Avalos, M.
PY - 2007/7
Y1 - 2007/7
N2 - Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).
AB - Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).
KW - Active sites
KW - Catalyst
KW - Gold
KW - Oxidation
KW - Zeolite
UR - http://www.scopus.com/inward/record.url?scp=34248228198&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34248228198&partnerID=8YFLogxK
U2 - 10.1016/j.catcom.2006.10.014
DO - 10.1016/j.catcom.2006.10.014
M3 - Article
VL - 8
SP - 977
EP - 980
JO - Catalysis Communications
JF - Catalysis Communications
SN - 1566-7367
IS - 7
ER -