| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Catalytic mechanism of the dehydrogenation of ethylbenzene over Fe-Co/Mg(Al)O derived from hydrotalcites |
|
言語 |
en |
| 作成者 |
Tope, Balkrishna B.
Balasamy, Rabindran J.
Khurshid, Alam
Atanda, Luqman A.
Yahiro, Hidenori
Shishido, Tetsuya
Takehira, Katsuomi
Al-Khattaf, Sulaiman S.
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
(c) 2012 Elsevier B.V. All rights reserved. |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Ethylbenzene dehydrogenation |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Styrene |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Fe(3+)-O-Co(3+/2+)(1/1) active species |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Hydrotalcite |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
EXAFS |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
FTIR |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
C-O bond formation |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
570 |
| 内容記述 |
|
|
内容記述 |
Catalytic mechanism of ethylbenzene dehydrogenation over Fe-Co/Mg(Al)O derived from hydrotalcites has been studied based on the XAFS and XPS catalyst characterization and the FTIR measurements of adsorbed species. Fe-Co/Mg(Al)O showed synergy, whereas Fe-Ni/Mg(Al)O showed no synergy, in the dehydrogenation of ethylbenzene. Ni species were stably incorporated as Ni(2+) in the regular sites in periclase and spinel structure in the Fe-Ni/Mg(Al)O. Contrarily, Co species exists as a mixture of Co(3+)/Co(2+) in the Fe-Co/Mg(Al)O and was partially isolated from the regular sites in the structures with increasing the Co content. Co addition enhanced Lewis acidity of Fe(3+) active sites by forming Fe(3+)-O-Co(3+/2+)(1/1) bond, resulting in an increase in the activity. FTIR of ethylbenzene adsorbed on the Fe-Co/Mg(Al)O clearly showed formations of C-O bond and pi-adsorbed aromatic ring. This suggests that ethylbenzene was strongly adsorbed on the Fe(3+) acid sites via pi-bonding and the dehydrogenation was initiated by alpha-H(+) abstraction from ethyl group on Mg(2+)-O(2-) basic sites, followed by C-O-Mg bond formation. The alpha-H(+) abstraction by O(2-)(-Mg(2+)) was likely followed by beta-H abstraction, leading to the formations of styrene and H(2). Such catalytic mechanism by the Fe(3+) acid-O(2-)(-Mg(2+)) base couple and the Fe(3+)/Fe(2+) reduction-oxidation cycle was further assisted by Co(3+)/Co(2+), leading to a good catalytic activity for the dehydrogenation of ethylbenzene. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
Elsevier Science BV |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
AO |
|
出版タイプResource |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
| 関連情報 |
|
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|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1016/j.apcata.2011.08.032 |
| 関連情報 |
|
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|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://dx.doi.org/10.1016/j.apcata.2011.08.032 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0926-860X |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA10821202 |
| 開始ページ |
|
|
開始ページ |
118 |
| 書誌情報 |
Applied Catalysis A-General
Applied Catalysis A-General
巻 407,
号 1-2,
p. 118-126,
発行日 2011
|
| 旧ID |
34822 |
ApplCatalGen_407_118.pdf (415.4 KB)
