XPS study of the nickel oxidation state in the reduced (Ag)NiMg/SiO2 vegetable oil hydrogenation catalysts
Аутори
Nikolova, DimitrinkaStanković, Miroslav
Simić, Sanja
Gabrovska, Margarita
Stefanov, Plamen
Edreva-Kardjieva, Rumeana
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Two series of (Ag)NiMg/SiO2 catalysts are synthesized on SiO2 support derived
from two silica sources: diatomite activated at 800oC (Series a; Mg/Ni=0.1 and
SiO2/Ni=1.07) and synthetic water glass (Series b; Mg/Ni=0.1 and SiO2/Ni=1.15).
The modification with silver is made at three molar Ag/Ni ratios, namely 0.0025,
0.025 and 0.1.
The effect of the source of SiO2 support as well as of the Ag presence and
content on the nickel oxidation state in the co-precipitated (Ag)NiMg/SiO2
catalysts after reduction-passivation procedure are studied by XPS.
The peak-fitting of the composite Ni2p level confirms that nickel on the
surface is presented in Ni0 and Ni2+ oxidation states. The higher content of Ni0 on
the surface of the diatomite supported catalysts shows that the metallic nickel is
more stable to oxidation in comparison of the water glass supported ones.
Кључне речи:
(Ag)NiMg/SiO2 catalysts / SiO2 support / XPS study / Vegetable oil hydrogenationИзвор:
Proceedings - 9th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2008, September 24-26, 2008, Belgrade, Serbia, 2008, I, 175-177Издавач:
- Society of Physical Chemists of Serbia
Финансирање / пројекти:
- Мезопорозни и наноматеријали у каталитичким и сорпционим процесима (RS-MESTD-MPN2006-2010-166001)
Институција/група
IHTMTY - CONF AU - Nikolova, Dimitrinka AU - Stanković, Miroslav AU - Simić, Sanja AU - Gabrovska, Margarita AU - Stefanov, Plamen AU - Edreva-Kardjieva, Rumeana PY - 2008 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6323 AB - Two series of (Ag)NiMg/SiO2 catalysts are synthesized on SiO2 support derived from two silica sources: diatomite activated at 800oC (Series a; Mg/Ni=0.1 and SiO2/Ni=1.07) and synthetic water glass (Series b; Mg/Ni=0.1 and SiO2/Ni=1.15). The modification with silver is made at three molar Ag/Ni ratios, namely 0.0025, 0.025 and 0.1. The effect of the source of SiO2 support as well as of the Ag presence and content on the nickel oxidation state in the co-precipitated (Ag)NiMg/SiO2 catalysts after reduction-passivation procedure are studied by XPS. The peak-fitting of the composite Ni2p level confirms that nickel on the surface is presented in Ni0 and Ni2+ oxidation states. The higher content of Ni0 on the surface of the diatomite supported catalysts shows that the metallic nickel is more stable to oxidation in comparison of the water glass supported ones. PB - Society of Physical Chemists of Serbia C3 - Proceedings - 9th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2008, September 24-26, 2008, Belgrade, Serbia T1 - XPS study of the nickel oxidation state in the reduced (Ag)NiMg/SiO2 vegetable oil hydrogenation catalysts VL - I SP - 175 EP - 177 UR - https://hdl.handle.net/21.15107/rcub_cer_6323 ER -
@conference{ author = "Nikolova, Dimitrinka and Stanković, Miroslav and Simić, Sanja and Gabrovska, Margarita and Stefanov, Plamen and Edreva-Kardjieva, Rumeana", year = "2008", abstract = "Two series of (Ag)NiMg/SiO2 catalysts are synthesized on SiO2 support derived from two silica sources: diatomite activated at 800oC (Series a; Mg/Ni=0.1 and SiO2/Ni=1.07) and synthetic water glass (Series b; Mg/Ni=0.1 and SiO2/Ni=1.15). The modification with silver is made at three molar Ag/Ni ratios, namely 0.0025, 0.025 and 0.1. The effect of the source of SiO2 support as well as of the Ag presence and content on the nickel oxidation state in the co-precipitated (Ag)NiMg/SiO2 catalysts after reduction-passivation procedure are studied by XPS. The peak-fitting of the composite Ni2p level confirms that nickel on the surface is presented in Ni0 and Ni2+ oxidation states. The higher content of Ni0 on the surface of the diatomite supported catalysts shows that the metallic nickel is more stable to oxidation in comparison of the water glass supported ones.", publisher = "Society of Physical Chemists of Serbia", journal = "Proceedings - 9th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2008, September 24-26, 2008, Belgrade, Serbia", title = "XPS study of the nickel oxidation state in the reduced (Ag)NiMg/SiO2 vegetable oil hydrogenation catalysts", volume = "I", pages = "175-177", url = "https://hdl.handle.net/21.15107/rcub_cer_6323" }
Nikolova, D., Stanković, M., Simić, S., Gabrovska, M., Stefanov, P.,& Edreva-Kardjieva, R.. (2008). XPS study of the nickel oxidation state in the reduced (Ag)NiMg/SiO2 vegetable oil hydrogenation catalysts. in Proceedings - 9th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2008, September 24-26, 2008, Belgrade, Serbia Society of Physical Chemists of Serbia., I, 175-177. https://hdl.handle.net/21.15107/rcub_cer_6323
Nikolova D, Stanković M, Simić S, Gabrovska M, Stefanov P, Edreva-Kardjieva R. XPS study of the nickel oxidation state in the reduced (Ag)NiMg/SiO2 vegetable oil hydrogenation catalysts. in Proceedings - 9th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2008, September 24-26, 2008, Belgrade, Serbia. 2008;I:175-177. https://hdl.handle.net/21.15107/rcub_cer_6323 .
Nikolova, Dimitrinka, Stanković, Miroslav, Simić, Sanja , Gabrovska, Margarita, Stefanov, Plamen, Edreva-Kardjieva, Rumeana, "XPS study of the nickel oxidation state in the reduced (Ag)NiMg/SiO2 vegetable oil hydrogenation catalysts" in Proceedings - 9th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2008, September 24-26, 2008, Belgrade, Serbia, I (2008):175-177, https://hdl.handle.net/21.15107/rcub_cer_6323 .