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

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

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

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
Volume9
Issue number3
DOIs
Publication statusPublished - 1 Mar 2008

Keywords

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

Fingerprint Dive into the research topics of 'Ultra-selective gas phase catalytic hydrogenation of aromatic nitro compounds over Au/Al<sub>2</sub>O<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this