Remarkable effect of alkalis on the chemoselective hydrogenation of functionalized nitroarenes over high-loading Pt/FeO:X catalysts

Haisheng Wei, Yujing Ren, Aiqin Wang, Xiaoyan Liu, Xin Liu, Leilei Zhang, Shu Miao, Lin Li, Jingyue Liu, Junhu Wang, Guofu Wang, Dangsheng Su, Tao Zhang

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Abstract

The chemoselective hydrogenation of substituted nitroarenes to form the corresponding functionalized anilines is an important type of reaction in fine chemistry, and the chemoselectivity is critically dependent on the rational design of the catalysts. This reaction has rarely been accomplished over high-loading Pt catalysts due to the formation of Pt crystals. Here, for the first time, we report that alkali metals (Li+, Na+, K+, etc.) can transform the non-selective high loading Pt/FeOx catalyst to a highly chemoselective one. The best result was obtained over a 5% Na-2.16% Pt/FeOx catalyst, which enhanced the chemoselectivity from 66.4% to 97.4% while the activity remained almost unchanged for the probe reaction of 3-nitrostyrene hydrogenation to 3-aminostyrene. Using aberration-corrected HAADF-STEM, in situ XAS, 57 and Fe Mössbauer and DRIFT spectroscopy, the active site of a Pt-O-Na-O-Fe-like species was proposed, which ensures that the Pt centers are isolated and positively charged for the preferential adsorption of the -NO2 group.

Original languageEnglish (US)
Pages (from-to)5126-5131
Number of pages6
JournalChemical Science
Volume8
Issue number7
DOIs
StatePublished - 2017

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Alkalies
Hydrogenation
Catalysts
Aniline Compounds
Alkali Metals
Aberrations
Spectroscopy
Adsorption
Crystals

ASJC Scopus subject areas

  • Chemistry(all)

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Remarkable effect of alkalis on the chemoselective hydrogenation of functionalized nitroarenes over high-loading Pt/FeO:X catalysts. / Wei, Haisheng; Ren, Yujing; Wang, Aiqin; Liu, Xiaoyan; Liu, Xin; Zhang, Leilei; Miao, Shu; Li, Lin; Liu, Jingyue; Wang, Junhu; Wang, Guofu; Su, Dangsheng; Zhang, Tao.

In: Chemical Science, Vol. 8, No. 7, 2017, p. 5126-5131.

Research output: Contribution to journalArticle

Wei, H, Ren, Y, Wang, A, Liu, X, Liu, X, Zhang, L, Miao, S, Li, L, Liu, J, Wang, J, Wang, G, Su, D & Zhang, T 2017, 'Remarkable effect of alkalis on the chemoselective hydrogenation of functionalized nitroarenes over high-loading Pt/FeO:X catalysts', Chemical Science, vol. 8, no. 7, pp. 5126-5131. https://doi.org/10.1039/c7sc00568g
Wei, Haisheng ; Ren, Yujing ; Wang, Aiqin ; Liu, Xiaoyan ; Liu, Xin ; Zhang, Leilei ; Miao, Shu ; Li, Lin ; Liu, Jingyue ; Wang, Junhu ; Wang, Guofu ; Su, Dangsheng ; Zhang, Tao. / Remarkable effect of alkalis on the chemoselective hydrogenation of functionalized nitroarenes over high-loading Pt/FeO:X catalysts. In: Chemical Science. 2017 ; Vol. 8, No. 7. pp. 5126-5131.
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AU - Liu, Xin

AU - Zhang, Leilei

AU - Miao, Shu

AU - Li, Lin

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AU - Wang, Junhu

AU - Wang, Guofu

AU - Su, Dangsheng

AU - Zhang, Tao

PY - 2017

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