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RSC Advances
DOI: 10.1039/C5RA20734G
ARTICLE
Journal Name
1
. J. Oliver-Meseguer, J. R. Cabrero-Antonino, I. Dominguez, A.
Leyva-Pérez and A. Corma, Science, 2012, 338, 1452-1455.
. A. Kongkanand, K. Tvrdy, K. Takechi, M. Kuno and P. V.
Kamat, J. Am. Chem. Soc., 2008, 130, 4007-4015.
. S. Proch, M. Wirth, H. S. White and S. L. Anderson, J. Am.
Chem. Soc., 2013, 135, 3073-3086.
. S. Kundu, V. Maheshwari, S. Niu and R. F. Saraf,
Nanotechnology, 2008, 19
. M. Haruta, S. Tsubota, T. Kobayashi, H. Kageyama, M. J.
Genet and B. Delmon, J. Catal., 1993, 144, 175-192.
. S. A. C. Carabineiro, L. M. D. R. S. Martins, M. Avalos-Borja, J.
2
3
4
.
5
6
G. Buijnsters, A. J. L. Pombeiro and J. L. Figueiredo, Appl. Catal.,
A, 2013, 467, 279-290.
7
. B. Nkosi, M. D. Adams, N. J. Coville and G. J. Hutchings, J.
Catal., 1991, 128, 378-386.
. T. Mitsudome and K. Kaneda, Green Chem., 2013, 15, 2636-
8
Figure4. Conversion of cyclohexane and selectivity towards KA-oil for different 2654.
catalyst. Amount of gold in case of control experiment was higher (1000
9
. M. Turner, V. B. Golovko, O. P. H. Vaughan, P. Abdulkin, A.
times) than in case of Au@ZMS-5 and Au@MCM-22.
Berenguer-Murcia, M. S. Tikhov, B. F. G. Johnson and R. M.
Lambert, Nature, 2008, 454, 981-983.
acid, hexanoic acid, acetic acid, pentanoic acid) were also
formed.
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0. J. Zhao, Z. Zheng, S. Bottle, A. Chou, S. Sarina and H. Zhu,
Chem. Commun., 2013, 49, 2676-2678.
1. D. Gajan, K. Guillois, P. Delichère, J.-M. Basset, J.-P. Candy, V.
Caps, C. Coperet, A. Lesage and L. Emsley, J. Am. Chem. Soc.,
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3.5
Rationalizing higher selectivity towards cyclohexanol and
cyclohexanone by Au@Zeolites
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1
009, 131, 14667-14669.
Gold enhances the cyclohexanol formation by cleavage of O–O
bond present in cyclohexyl hydroperoxide which makes the
2. F. Yang, M. S. Chen and D. W. Goodman, J. Phys. Chem. C,
3
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2008, 113, 254-260.
reaction more selective towards cyclohexanol formation
FigureS16) in case of Au@ZSM-5 in comparison to bare ZSM-5
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3. H. Wang, K. Schaefer and M. Moeller, J. Phys. Chem. C, 2008,
12, 3175-3178.
(
and hence increasing overall selectivity towards KA-oil. On the
other hand Au@MCM-22 and bare MCM-22 having similar
concentration of strong acid sites exhibit similar activity
towards KA-oil. As no gold is present in commercially and
conventionally prepared zeolites, they showed lesser
selectivity towards KA-oil in comparison to Au@ZSM-5.
4. A. J. Forman, J.-N. Park, W. Tang, Y.-S. Hu, G. D. Stucky and E.
W. McFarland, ChemCatChem, 2010,
5. S. Wang, Q. Zhao, H. Wei, J.-Q. Wang, M. Cho, H. S. Cho, O.
Terasaki and Y. Wan, J. Am. Chem. Soc., 2013, 135, 11849-11860.
6. R. C. B. Scaravelli, R. L. Dazzi, F. C. Giacomelli, G. Machado, C.
Giacomelli and V. Schmidt, J. Colloid Interface Sci., 2013, 397
2, 1318-1324.
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1
,
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14-121.
7. U. Schuchardt, D. Cardoso, R. Sercheli, R. Pereira, R. S. da
4
. Conclusion
Cruz, M. C. Guerreiro, D. Mandelli, E. V. Spinacé and E. L. Pires,
In conclusion, sinter-resistant monodispersed Au@MCM-22
and Au@ZSM-5 were successfully synthesized via conversion
of Au@silica through hydrothermal route. These gold
nanoparticle encapsulated by zeolite nanoshell catalysts
showed higher activity towards cyclohexane oxidation in
Appl. Catal., A 2001, 211, 1-17.
1
8. J. Jae, G. A. Tompsett, A. J. Foster, K. D. Hammond, S. M.
Auerbach, R. F. Lobo and G. W. Huber, J. Catal., 2011, 279, 257-
2
1
68.
9. W. Yao, Y. Chen, L. Min, H. Fang, Z. Yan, H. Wang and J.
comparison to commercial and conventionally prepared
o
zeolites at 150 C temperature and 1MPa O
Wang, J. Mol. Catal. A: Chem., 2006, 246, 162-166.
0. X. Zhou, H. Chen, X. Cui, Z. Hua, Y. Chen, Y. Zhu, Y. Song, Y.
Gong and J. Shi, Appl. Catal.,A, 2013, 451, 112-119.
2
pressure. This
2
method can be generalized to assemble various nanoparticles
encapsulated by different zeolite shells to cater towards
various reactions performed at harsh conditions.
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2
1. A. Sakthivel and P. Selvam, J. Catal., 2002, 211, 134-143.
2. E. L. Pires, J. o. C. Magalhães and U. Schuchardt, Appl. Catal.,
A, 2000, 203, 231-237.
3. R. Zhao, D. Ji, G. Lv, G. Qian, L. Yan, X. Wang and J. Suo,
Chem. Commun., 2004, 904-905.
2
Acknowledgements
We are thankful to Indian Institute of Technology Kanpur for 24. K. Nakano, S. A. Ali, H. J. Kim, T. Kim, K. Alhooshani, J. I. Park
providing us financial and technical support.
and I. Mochida, Fuel Process. Technol, 2013, 116, 44-51.
5. K. Mori, T. Yamaguchi, S. Ikurumi and H. Yamashita, Chem.
Commun., 2013, 49, 10468-10470.
6. N. Ren, Y. H. Yang, J. Shen, Y. H. Zhang, H. L. Xu, Z. Gao and Y.
Tang, J. Catal., 2007, 251, 182-188.
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References
2
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