Surface characterization of aluminum pillared clay-supported cobalt
Аутори
Milovanović, BiljanaMarinović, Sanja
Milutinović Nikolić, Aleksandra
Petrović, Rada
Stevanović, Gordana
Banković, Predrag
Mudrinić, Tihana
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Our previous study demonstrated that cobalt content strongly affected the electro-activity of
aluminum pillared clay-supported cobalt (CoAP) toward glucose oxidation. It was found that
the electro-activity of CoAP increased with the increase of cobalt loading. However, at the 10
wt.% of cobalt content, the electro-activity significantly decreased. In the present study, the
focus is on the investigation of the nature of the surface sites that might cause the difference
in the electro-activity of CoAP. For this purpose, CoAP with 3 wt.% and 10 wt.% cobalt
contents (x%CoAP, x=3 and 10) were characterized using FE-SEM and HR-TEM with EDX
techniques, and XPS. The microscopic techniques coupled with EDX have shown that cobalt
oxide nanoparticles were evenly distributed in both samples. However, the higher cobalt
loading resulted in cobalt oxide agglomeration that led to larger particle sizes. The results of
XPS confirmed the presence of Co (II) in the 3%CoAP. On the other hand, the... presence of
Co3O4 which contains both Co (II) and Co (III) was confirmed in 10%CoAP. It is clear from
this study that the electro-activity of CoAP strongly depends on the oxidation state of cobalt.
However, the effect of agglomeration and cobalt oxide particle sizes cannot be ruled out.
Кључне речи:
aluminum pillared clay-supported cobalt / electrochemical activity / oxidation state of cobaltИзвор:
Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia, 2022, 68-68Издавач:
- Serbian Ceramic Society
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (RS-MESTD-inst-2020-200026)
Институција/група
IHTMTY - CONF AU - Milovanović, Biljana AU - Marinović, Sanja AU - Milutinović Nikolić, Aleksandra AU - Petrović, Rada AU - Stevanović, Gordana AU - Banković, Predrag AU - Mudrinić, Tihana PY - 2022 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6281 AB - Our previous study demonstrated that cobalt content strongly affected the electro-activity of aluminum pillared clay-supported cobalt (CoAP) toward glucose oxidation. It was found that the electro-activity of CoAP increased with the increase of cobalt loading. However, at the 10 wt.% of cobalt content, the electro-activity significantly decreased. In the present study, the focus is on the investigation of the nature of the surface sites that might cause the difference in the electro-activity of CoAP. For this purpose, CoAP with 3 wt.% and 10 wt.% cobalt contents (x%CoAP, x=3 and 10) were characterized using FE-SEM and HR-TEM with EDX techniques, and XPS. The microscopic techniques coupled with EDX have shown that cobalt oxide nanoparticles were evenly distributed in both samples. However, the higher cobalt loading resulted in cobalt oxide agglomeration that led to larger particle sizes. The results of XPS confirmed the presence of Co (II) in the 3%CoAP. On the other hand, the presence of Co3O4 which contains both Co (II) and Co (III) was confirmed in 10%CoAP. It is clear from this study that the electro-activity of CoAP strongly depends on the oxidation state of cobalt. However, the effect of agglomeration and cobalt oxide particle sizes cannot be ruled out. PB - Serbian Ceramic Society C3 - Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia T1 - Surface characterization of aluminum pillared clay-supported cobalt SP - 68 EP - 68 UR - https://hdl.handle.net/21.15107/rcub_cer_6281 ER -
@conference{ author = "Milovanović, Biljana and Marinović, Sanja and Milutinović Nikolić, Aleksandra and Petrović, Rada and Stevanović, Gordana and Banković, Predrag and Mudrinić, Tihana", year = "2022", abstract = "Our previous study demonstrated that cobalt content strongly affected the electro-activity of aluminum pillared clay-supported cobalt (CoAP) toward glucose oxidation. It was found that the electro-activity of CoAP increased with the increase of cobalt loading. However, at the 10 wt.% of cobalt content, the electro-activity significantly decreased. In the present study, the focus is on the investigation of the nature of the surface sites that might cause the difference in the electro-activity of CoAP. For this purpose, CoAP with 3 wt.% and 10 wt.% cobalt contents (x%CoAP, x=3 and 10) were characterized using FE-SEM and HR-TEM with EDX techniques, and XPS. The microscopic techniques coupled with EDX have shown that cobalt oxide nanoparticles were evenly distributed in both samples. However, the higher cobalt loading resulted in cobalt oxide agglomeration that led to larger particle sizes. The results of XPS confirmed the presence of Co (II) in the 3%CoAP. On the other hand, the presence of Co3O4 which contains both Co (II) and Co (III) was confirmed in 10%CoAP. It is clear from this study that the electro-activity of CoAP strongly depends on the oxidation state of cobalt. However, the effect of agglomeration and cobalt oxide particle sizes cannot be ruled out.", publisher = "Serbian Ceramic Society", journal = "Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia", title = "Surface characterization of aluminum pillared clay-supported cobalt", pages = "68-68", url = "https://hdl.handle.net/21.15107/rcub_cer_6281" }
Milovanović, B., Marinović, S., Milutinović Nikolić, A., Petrović, R., Stevanović, G., Banković, P.,& Mudrinić, T.. (2022). Surface characterization of aluminum pillared clay-supported cobalt. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia Serbian Ceramic Society., 68-68. https://hdl.handle.net/21.15107/rcub_cer_6281
Milovanović B, Marinović S, Milutinović Nikolić A, Petrović R, Stevanović G, Banković P, Mudrinić T. Surface characterization of aluminum pillared clay-supported cobalt. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia. 2022;:68-68. https://hdl.handle.net/21.15107/rcub_cer_6281 .
Milovanović, Biljana, Marinović, Sanja, Milutinović Nikolić, Aleksandra, Petrović, Rada, Stevanović, Gordana, Banković, Predrag, Mudrinić, Tihana, "Surface characterization of aluminum pillared clay-supported cobalt" in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia (2022):68-68, https://hdl.handle.net/21.15107/rcub_cer_6281 .