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Cited by 10Catalysis for Biomass ConversionCatalysis and Hydrodesulfurization StudiesCatalysts for Methane Reforming

Hydrodeoxygenation of Guaiacol to Cyclohexanol Using Noble Metal‐Supported Ni‐Based Perovskite‐Derived Catalysts

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Marimuthu, Prabu, Raja, Thirumalaiswamy, Vinu, Ravikrishnan·2025·ChemCatChem
DOI 10.1002/cctc.202500577
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Abstract

This study focuses on the role of noble metal‐doped Ni‐based perovskites, specifically LaNiO 3 and NiTiO 3 catalysts in the hydrodeoxygenation (HDO) of guaiacol. The findings demonstrate that reduced Ru‐LaNiO 3 catalyst achieved superior performance with 100% guaiacol conversion and a 75% selectivity toward cyclohexanol, compared to reduced Ru‐NiTiO 3 , which achieved only 43% conversion and 25% cyclohexanol selectivity under identical conditions (240 °C, 30 bar H 2 , and 4 h). High‐resolution transmission electron microscopic (HR‐TEM) analysis reveals that LaNiO 3 ‐supported catalysts exhibit better metal dispersion and smaller nickel nanoparticle sizes compared to NiTiO 3 ‐supported counterparts. X‐ray photoelectron spectroscopy (XPS) analysis shows that the reduction of nickel and noble metals is more facile on LaNiO 3 . Additionally, the O 1s XPS profile for reduced Ru‐LaNiO 3 indicates a higher proportion of lattice oxygen (O Lat ∼ 79%) and a lower proportion of oxygen vacancies (O Vac ∼ 21%) compared to other catalyst systems. The optimized O Lat /O Vac ratio is shown to be critical for the effective HDO of guaiacol. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) demonstrates a high HDO reaction rate using reduced Ru‐LaNiO 3 than reduced Ru‐NiTiO 3 , with cyclohexanol formation attributed to the keto‐enol tautomerization pathway. Overall, this study underscores the critical roles of oxygen vacancies, metal dispersion, and metal–metal oxide interactions in the HDO of guaiacol.

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Authors
Marimuthu, P., Raja, T., & Vinu, R.
Affiliations
  • Department of Chemical Engineering and National Centre for Combustion Research and Development IIT Madras Chennai 600036 India
  • National Chemical Laboratory (IN)
  • Indian Institute of Technology Madras (IN)
Corresponding author
Vinu, Ravikrishnan
ORCID
Venue
ChemCatChem
Publisher
Wiley
Published
2025-06-23
Volume
17
Issue
15
ISSN
  • 1867-3880 (ISSN-L)
  • 1867-3899
DOI
10.1002/cctc.202500577
OpenAlex
W4411615515
Cited by
10
References
1
Citations by year
2026: 8 · 2025: 2
FWCI
2.42
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations
ChemCatChem (publishedVersion)
Funders
Department of Science and Technology, Government of Kerala (DST/TDT/WMT/PlasticWaste/2021/09)
Topics
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysis for Biomass Conversion
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysis and Hydrodesulfurization Studies
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
Keywords
hydrodeoxygenation, guaiacol, cyclohexanol, LaNiO3, NiTiO3, ruthenium doping, oxygen vacancies, lattice oxygen, metal dispersion, keto-enol tautomerism, metal-support interaction, biomass-derived aromatics

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