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Published in: Topics in Catalysis 14/2018

22-08-2018 | Original Paper

Hierarchical Porosity Tailoring of Sol–Gel Derived Pt/SiO2 Catalysts

Authors: Andrés Felipe Sierra-Salazar, André Ayral, Tony Chave, Vasile Hulea, Sergey I. Nikitenko, Siglinda Perathoner, Patrick Lacroix-Desmazes

Published in: Topics in Catalysis | Issue 14/2018

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Abstract

Hierarchically porous materials offer the opportunity for catalyst development in regards to improving catalytic performances. In the present work, the combination of latex synthesis, sonochemical reduction and two-step catalysed sol–gel process has been demonstrated to be a versatile method for preparing supported catalysts with tailored hierarchical porosity. This method has been used to prepare porous Pt/SiO2 catalysts with mesopore and macropore size ranges as large as 2–15 nm and 90–400 nm, respectively. These hierarchically porous catalysts presented an excellent catalytic performance for the selective hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CAN). Selectivity values up to 100% at 80% conversion of p-CNB and initial reaction rates up to 74.0 molCNB/min molPt were obtained, while a commercial catalyst exhibited both a lower selectivity of 90.8% and a lower initial reaction rate of 47.7 molCNB/min molPt.

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Appendix
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Metadata
Title
Hierarchical Porosity Tailoring of Sol–Gel Derived Pt/SiO2 Catalysts
Authors
Andrés Felipe Sierra-Salazar
André Ayral
Tony Chave
Vasile Hulea
Sergey I. Nikitenko
Siglinda Perathoner
Patrick Lacroix-Desmazes
Publication date
22-08-2018
Publisher
Springer US
Published in
Topics in Catalysis / Issue 14/2018
Print ISSN: 1022-5528
Electronic ISSN: 1572-9028
DOI
https://doi.org/10.1007/s11244-018-1032-0

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