TY - JOUR
T1 - Catalytic production of anilines by nitro-compounds hydrogenation over highly recyclable platinum nanoparticles supported on halloysite nanotubes
AU - Campos, Cristian H.
AU - Shanmugaraj, Krishnamoorthy
AU - Bustamante, Tatiana M.
AU - Leal-Villarroel, Edgardo
AU - Vinoth, Victor
AU - Aepuru, Radhamanohar
AU - Mangalaraja, Ramalinga Viswanathan
AU - Torres, Cecilia C.
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/7/1
Y1 - 2022/7/1
N2 - 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.
AB - 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.
KW - Halloysite nanotubes
KW - Nitro compounds hydrogenation
KW - Pt-based catalyst
KW - Recycling catalyst
UR - http://www.scopus.com/inward/record.url?scp=85111011728&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2021.06.027
DO - 10.1016/j.cattod.2021.06.027
M3 - Article
AN - SCOPUS:85111011728
SN - 0920-5861
VL - 394-396
SP - 510
EP - 523
JO - Catalysis Today
JF - Catalysis Today
ER -