Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance

Gao D, Li S, Wang X, Xi L, Aziz-Lange K, Ma X, Lv Y, Yang S, Zhao K, Loussala HM, Duan A, et al. (2019)
JOURNAL OF CATALYSIS 370: 385-403.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
The fabrication of ultrafine PtRu alloy nanoparticles (NPs) confined in mesoporous carbon (MCN) remains a great challenge due to its high carbonization temperature, and the mechanism of ultrafine PtRu alloy NPs for hydrogenation reaction is still ambiguous. We report herein, for the first time, a general synthesis of ultrafine PtRu alloy NPs (less than 1.5 nm) encapsulated in MCN derived from micro-mesoporous zeolite under microwave-assisted heating. The ultrafine PtRu NPs are well dispersed in the structure of mesoporous carbon, and exhibit excellent stability. The reductive Pt2Ru NPs supported on MCN (Pt2Ru/MCN-R, R denotes reduction) exhibit the highest reaction rate constant k (0.894 min(-1)) and TOF (0.317 s(-1)) for 4-nitrophenol (4-NP) reduction, and have an excellent reduction ability for other nitroarenes. In-depth investigation of the structure-property relationship by high resolution transmission electron microscopy, X-ray absorption near edge structure analysis, X-ray photoelectron spectroscopy, and density functional theory calculation revealed that the Pt atoms as the active sites exhibit higher reduction ability for 4-NP, while the Ru atoms as the active sites have higher adsorption ability towards 4-NP. Therefore, the bifunctional mechanism and/or electronic synergistic effects of Pt and Ru play an important role in the reduction of 4-NP, and a good balance between the amount of Ru and Pt with Pt/Ru mole ratio of 2.0 has been demonstrated to be well suitable for 4-NP reduction. (C) 2019 Elsevier Inc. All rights reserved.
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JOURNAL OF CATALYSIS
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370
Seite(n)
385-403
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Gao D, Li S, Wang X, et al. Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance. JOURNAL OF CATALYSIS. 2019;370:385-403.
Gao, D., Li, S., Wang, X., Xi, L., Aziz-Lange, K., Ma, X., Lv, Y., et al. (2019). Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance. JOURNAL OF CATALYSIS, 370, 385-403. doi:10.1016/j.jcat.2019.01.011
Gao, D., Li, S., Wang, X., Xi, L., Aziz-Lange, K., Ma, X., Lv, Y., Yang, S., Zhao, K., Loussala, H. M., et al. (2019). Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance. JOURNAL OF CATALYSIS 370, 385-403.
Gao, D., et al., 2019. Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance. JOURNAL OF CATALYSIS, 370, p 385-403.
D. Gao, et al., “Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance”, JOURNAL OF CATALYSIS, vol. 370, 2019, pp. 385-403.
Gao, D., Li, S., Wang, X., Xi, L., Aziz-Lange, K., Ma, X., Lv, Y., Yang, S., Zhao, K., Loussala, H.M., Duan, A., Zhang, X., Chen, G.: Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance. JOURNAL OF CATALYSIS. 370, 385-403 (2019).
Gao, Daowei, Li, Shuna, Wang, Xilong, Xi, Lifei, Aziz-Lange, Kathrin, Ma, Xinlong, Lv, Yipin, Yang, Shaohan, Zhao, Kaixuan, Loussala, Herman M., Duan, Aijun, Zhang, Xin, and Chen, Guozhu. “Ultrafine PtRu nanoparticles confined in hierarchically porous carbon derived from micro-mesoporous zeolite for enhanced nitroarenes reduction performance”. JOURNAL OF CATALYSIS 370 (2019): 385-403.