Ultra-selective gas phase catalytic hydrogenation of aromatic nitro compounds over Au/Al2O3

Fernando Cardenas-Lizana, Santiago Gómez-Quero, Mark A. Keane

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116 Citations (Scopus)


We report, for the first time, the exclusive (and time invariant) gas phase hydrogenation of p-chloronitrobenzene to p-chloroaniline over Au/Al2O3 where 393 K = T = 523 K (?Ea = 49 kJ mol-1). Under the same conditions, Pd/Al2O3 promoted the formation of nitrobenzene and aniline, i.e. composite hydrodechlorination and hydrogenation. Reaction over Au-Pd/Al2O3 delivered equivalent activity/selectivity to that obtained with Pd/Al2O3. Temperature programmed reduction analysis and hydrogen uptake measurements suggest there is negligible Au-Pd interaction in the bimetallic. Exclusive formation of the corresponding haloaniline is also demonstrated over Au/Al2O3 for a series of mono- and di-substituted halonitroarenes; the activity sequence is consistent with electron withdrawing substituent activation. © 2007 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)475-481
JournalCatalysis Communications
Issue number3
Publication statusPublished - 1 Mar 2008


  • Au-Pd/Al 2 O 3
  • Au/Al 2 O 3
  • Halonitroarene
  • Selective hydrogenation


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