Open Access
Identification of subnanometric ag species, their interaction with supports and role in catalytic co oxidation
Yulia Kotolevich
1
,
Ekaterina Kolobova
2
,
Evgeniy Khramov
3
,
Jesús Cabrera Ortega
4
,
Mario Farias
1
,
Yan Zubavichus
3
,
Rodolfo Zanella
5
,
Josué Mota Morales
1, 6
,
Alexey Pestryakov
2
,
Nina Bogdanchikova
1
,
2
6
CONACYT Research Fellow at Centro de Nanociencias y Nanotecnología, UNAM, Ensenada 22860, Mexico
|
7
Institute of Catalysis and Petroleumchemistry (ICP), Spanish Council for Scientific Research (CSIC), Madrid 28049, Spain
|
Publication type: Journal Article
Publication date: 2016-04-22
PubMed ID:
27110757
Organic Chemistry
Drug Discovery
Physical and Theoretical Chemistry
Pharmaceutical Science
Molecular Medicine
Analytical Chemistry
Chemistry (miscellaneous)
Abstract
The nature and size of the real active species of nanoparticulated metal supported catalysts is still an unresolved question. The technique of choice to measure particle sizes at the nanoscale, HRTEM, has a practical limit of 1 nm. This work is aimed to identify the catalytic role of subnanometer species and methods to detect and characterize them. In this frame, we investigated the sensitivity to redox pretreatments of Ag/Fe/TiO2, Ag/Mg/TiO2 and Ag/Ce/TiO2 catalysts in CO oxidation. The joint application of HRTEM, SR-XRD, DRS, XPS, EXAFS and XANES methods indicated that most of the silver in all samples is in the form of Ag species with size <1 nm. The differences in catalytic properties and sensitivity to pretreatments, observed for the studied Ag catalysts, could not be explained taking into account only the Ag particles whose size distribution is measured by HRTEM, but may be explained by the presence of the subnanometer Ag species, undetectable by HRTEM, and their interaction with supports. This result highlights their role as active species and the need to take them into account to understand integrally the catalysis by supported nanometals.
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13
Total citations:
13
Citations from 2024:
1
(7%)
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GOST
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Kotolevich Y. et al. Identification of subnanometric ag species, their interaction with supports and role in catalytic co oxidation // Molecules. 2016. Vol. 21. No. 4. p. 532.
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Kotolevich Y., Kolobova E., Khramov E., Cabrera Ortega J., Farias M., Zubavichus Y., Zanella R., Mota Morales J., Pestryakov A., Bogdanchikova N., Cortés Corberán V. Identification of subnanometric ag species, their interaction with supports and role in catalytic co oxidation // Molecules. 2016. Vol. 21. No. 4. p. 532.
Cite this
RIS
Copy
TY - JOUR
DO - 10.3390/molecules21040532
UR - https://doi.org/10.3390/molecules21040532
TI - Identification of subnanometric ag species, their interaction with supports and role in catalytic co oxidation
T2 - Molecules
AU - Kotolevich, Yulia
AU - Kolobova, Ekaterina
AU - Khramov, Evgeniy
AU - Cabrera Ortega, Jesús
AU - Farias, Mario
AU - Zubavichus, Yan
AU - Zanella, Rodolfo
AU - Mota Morales, Josué
AU - Pestryakov, Alexey
AU - Bogdanchikova, Nina
AU - Cortés Corberán, V
PY - 2016
DA - 2016/04/22
PB - MDPI
SP - 532
IS - 4
VL - 21
PMID - 27110757
SN - 1420-3049
ER -
Cite this
BibTex (up to 50 authors)
Copy
@article{2016_Kotolevich,
author = {Yulia Kotolevich and Ekaterina Kolobova and Evgeniy Khramov and Jesús Cabrera Ortega and Mario Farias and Yan Zubavichus and Rodolfo Zanella and Josué Mota Morales and Alexey Pestryakov and Nina Bogdanchikova and V Cortés Corberán},
title = {Identification of subnanometric ag species, their interaction with supports and role in catalytic co oxidation},
journal = {Molecules},
year = {2016},
volume = {21},
publisher = {MDPI},
month = {apr},
url = {https://doi.org/10.3390/molecules21040532},
number = {4},
pages = {532},
doi = {10.3390/molecules21040532}
}
Cite this
MLA
Copy
Kotolevich, Yulia, et al. “Identification of subnanometric ag species, their interaction with supports and role in catalytic co oxidation.” Molecules, vol. 21, no. 4, Apr. 2016, p. 532. https://doi.org/10.3390/molecules21040532.
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