Identification of active sites for hydrogenation over Ru/SBA-15 using in situ Fourier-transform infrared spectroscopy

doi:10.1016/S1872-2067(16)62571-8

Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (9): 1597-1602.DOI: 10.1016/S1872-2067(16)62571-8

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Identification of active sites for hydrogenation over Ru/SBA-15 using in situ Fourier-transform infrared spectroscopy

Hangjia Shen, Xianyuan Wu, Dahao Jiang, Xiaonian Li, Jun Ni

Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China

Received:2016-11-25 Revised:2016-12-30 Online:2017-09-18 Published:2017-09-06
Contact: 10.1016/S1872-2067(16)62571-8
Supported by:
This work was supported by the National Natural Science Foundation of China (21303163), the Natural Science Foundation of Zhejiang Province (LY13B030006, LY17B060006), the Qianjiang Talent Project in Zhejiang Province (QJD1302011), and the Scientific Research Fund of Zhejiang Pro-vincial Education Department (Y201328681).

Abstract

Abstract:

The active sites for hydrogenation over Ru/SBA-15 catalysts were identified using in situ Fouri-er-transform infrared spectroscopy.The amount of active sites was proportional to the interfacial circumference of the Ru particles.In contrast,the rate of hydrogen spillover from Ru to the support was inversely proportional to the size of the Ru metal particles.Consequently,a catalyst with small Ru metal particles has a high rate of hydrogen spillover but a low density of active sites,whereas one with large Ru particles has a low rate of hydrogen spillover but a high density of active sites. The formation of these active sites is probably an intermediate step in hydrogen spillover.

Key words: Ru/SBA-15 catalyst, In-situ Fourier-transform infrared spectroscopy, Hydrogenation, Active site, Hydrogen spillover

Hangjia Shen, Xianyuan Wu, Dahao Jiang, Xiaonian Li, Jun Ni. Identification of active sites for hydrogenation over Ru/SBA-15 using in situ Fourier-transform infrared spectroscopy[J]. Chinese Journal of Catalysis, 2017, 38(9): 1597-1602.

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Identification of active sites for hydrogenation over Ru/SBA-15 using in situ Fourier-transform infrared spectroscopy

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