Designing versatile nanocatalysts based on PdNPs decorated on metal oxides for selective hydrogenolysis of biomass derived γ-valerolactone and reduction of nitro aromatics
Rajendiran, Rajesh; Balaga, Ravi; Balla, Putrakumar; Seelam, Prem Kumar; Challa, Prathap; Karuppiah, Alagusundari; Perupogu, Vijayanand; Rengarajan, Venkatesan; Lassi, Ulla; Bakhsh, Esraa M.; Khan, Sher Bahadar (2023-03-15)
Rajesh Rajendiran, Ravi Balaga, Putrakumar Balla, Prem Kumar Seelam, Prathap Challa, Alagusundari Karuppiah, Vijayanand Perupogu, Venkatesan Rengarajan, Ulla Lassi, Esraa M. Bakhsh, Sher Bahadar Khan, Designing versatile nanocatalysts based on PdNPs decorated on metal oxides for selective hydrogenolysis of biomass derived γ-valerolactone and reduction of nitro aromatics, Catalysis Communications, Volume 177, 2023, 106637, ISSN 1566-7367, https://doi.org/10.1016/j.catcom.2023.106637
© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2023042839329
Tiivistelmä
Abstract
In this work, we designed versatile heterogeneous nanocatalysts based on palladium nanoparticles (PdNPs) decorated on metal oxides supports (i.e., PdNPs/γ-Al₂O₃, PdNPs/WO₃ and PdNPs/Nb₂O₅) by step-wise controlled synthesis of novel monodispersed ∼2 nm PdNPs at room temperature and then impregnated over metal oxides. PdNPs supported catalysts were characterised by powder XRD, TEM, HRTEM, NH₃-TPD, N₂-BET, H₂-TPR, and XPS techniques. PdNPs based catalysts studied in two different model reactions were presented i.e., biomass platform chemical intermediate γ-valerolactone (GVL) conversion into pentanoic acid (PA) studied in vapor phase hydrogenolysis and 4-Nitrophenol (4-NP) reduction to 4-Aminophenol (4-AP) in liquid phase using NaBH₄ as reducing agent over 0.5 wt% Pd nanoparticles -based nanocatalysts. The relationship between the active sites and the catalytic performance was evaluated. The Under optimized reaction conditions, over 0.5 wt% PdNPs/γ-Al₂O₃ catalyst exhibited the highest PA yield of 100%, and over 0.5 wt% PdNPs/WO₃, 0.5 wt% PdNPs/Nb₂O₅ exhibited PA yields of 98% and 96% respectively. Over PdNPs/γ-Al₂O₃, PdNPs/WO₃, and PdNPs/Nb₂O₅, the reduction reaction rates in the 4-NP to 4-AP are 5.40 × 10⁻³ s⁻¹, 2.55 × 10⁻³ s⁻¹ and 2.30 × 10⁻³ s⁻¹ respectively. The calculated thermodynamic parameters of the Ea values for 4-NP to 4-AP reaction were 25.30, 26.75, and 27.81 KJ/mol for the PdNPs/γ-Al₂O₃, PdNPs/WO₃ and PdNPs/Nb₂O₅, respectively.
Kokoelmat
- Avoin saatavuus [31919]