University of Oulu

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,

Designing versatile nanocatalysts based on PdNPs decorated on metal oxides for selective hydrogenolysis of biomass derived γ-valerolactone and reduction of nitro aromatics

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Author: Rajendiran, Rajesh1; Balaga, Ravi1,2; Balla, Putrakumar3;
Organizations: 1Energy & Environmental Engineering Department, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad 500007, India
2State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian and University of Chinese Academy of Sciences, Beijing 100049, China
3Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
4Sustainable Chemistry Research Unit, Faculty of Technology, P.O. Box 4300, University of Oulu, Oulu 90014, Finland
5Department of Chemistry, Pondicherry Central University, Kalapet, Pondicherry 605014, India
6Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.7 MB)
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Language: English
Published: Elsevier, 2023
Publish Date: 2023-04-28


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.

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Series: Catalysis communications
ISSN: 1566-7367
ISSN-E: 1873-3905
ISSN-L: 1566-7367
Volume: 177
Article number: 106637
DOI: 10.1016/j.catcom.2023.106637
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
221 Nanotechnology
Funding: This research work was funded by Institutional Fund Projects under grant no. (IFPIP: 221-247-1443). The authors gratefully acknowledge technical and financial support provided by the Ministry of Education and King Abdulaziz University, DSR, Jeddah, Saudi Arabia.
Copyright information: © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (