Catalytic production of anilines by nitro-compounds hydrogenation over highly recyclable platinum nanoparticles supported on halloysite nanotubes

Cristian H. Campos, Krishnamoorthy Shanmugaraj, Tatiana M. Bustamante, Edgardo Leal-Villarroel, Victor Vinoth, Radhamanohar Aepuru, Ramalinga Viswanathan Mangalaraja, Cecilia C. Torres

Research output: Contribution to journalArticlepeer-review

Abstract

Pt-nanoparticles supported on halloysite-nanotubes (HNTs) were selectively deposited onto the inner (Pt(IN)/HNT) or outer (Pt(OUT)/HNT) surface of the support to evaluate their operational stability on the cleaner and efficient hydrogenation of nitro compounds to produce their corresponding anilines. The formation of Pt0-aggregates on the inner or outer surfaces was observed, with mean particles sizes of 2.4–2.9 nm. The catalysts were evaluated using ethanol as solvent and nitrobenzene as a model substrate at a temperature of 298 K, under 1 bar of H2 pressure. The Pt(IN)/HNT catalyst showed better catalytic performance than Pt(OUT)/HNT, which was mainly attributed to the confinement effect of the Pt-nanoparticles inside the HNTs. However, the operational stability showed that Pt(OUT)/HNT retained its catalytic performance after 15 cycles, while the Pt(IN)/HNT catalyst suffered deactivation after the 5th cycle. The best catalytic system showed a moderate-to-high efficiency in the efficient hydrogenation of 7 nitro compounds used to produce their corresponding anilines, which are important pharmaceutical building blocks.

Original languageEnglish
JournalCatalysis Today
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Halloysite nanotubes
  • Nitro compounds hydrogenation
  • Pt-based catalyst
  • Recycling catalyst

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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