Effect of the Preparation Method on Oxidation Over Time of Supported Cu0 Nanoparticles

Abstract

Given the recognized instability of copper in air and the propensity of metal nanoparticles to undergo oxidation under ambient conditions, this study compares the stability of Cu nanoparticles supported on TiO2 synthesized by two methods: the aqueous reduction method and the wet impregnation followed by H2 reduction method. Over a period of four months, the solids were subjected to extensive characterization by x-ray diffraction (XRD), N2O chemisorption, H2-TPR and x-ray photoelectron spectroscopy (XPS). Raman analysis and electron energy loss spectroscopy (EELS) were also employed to map the oxidation states of Cu. Catalytic activity in acceptor-less dehydrogenation of 2-octanol was evaluated. The results demonstrate that the Cu nanoparticles prepared by aqueous reduction with NaBH4 are not fully reduced after synthesis, compared to the one reduced with H2. The oxidation occurs first in the outer layer, then progressively extend to the core. The catalyst prepared by aqueous reduction showed a higher Cu dispersion which resulted in higher 2-octanone productivity.

Nb2CTx Mxene-supported ultrafine palladium nanoparticles for aerobic oxidation of aromatic alcohols and one-pot synthesis of functionalized heterocycles
Muskan Deshmukh, Nikhil Dnyaneshwar Shitole, Jai Singh +3
RSC Advances9 Oct 2026Peer-reviewedCC BY-NC 3.0Full textOrganic chemistryPMC
Development of a method for the preparation of zirconium-89 radiolabelled chitosan nanoparticles as an application for leukocyte trafficking with positron emission tomography
M. Fairclough, B. Ellis, H. Boutin +5
Applied Radiation and Isotopes6 Oct 2026Peer-reviewedLicence not stated23 citedInorganic & organometallic chemistryHAL
General Preparation of Nickel-Based Compound/Carbon Nanotube Catalysts for the Urea Oxidation Reaction
Yanjie Xia, Sheng-Zhi Ma, Yi-Jun Chen +4
Nanomaterials (Basel, Switzerland)1 Oct 2026Peer-reviewedCC BYFull textElectrochemistry & energyEurope PMCCrossref
3D network carbon nanotube film supported FeCoNiCrMn high-entropy alloy nanoparticles for integrated adsorption and detoxification of sulfur mustard simulant
Linxiao Gou, Wenwen Chen, Dong Chen +4
RSC advances27 Oct 2026Peer-reviewedCC BY-NCFull textGeneral chemistryEurope PMC
Deoxygenation of amine N-oxides using gold nanoparticles supported on carbon nanotubes
Simon Donck, Edmond Gravel, Nimesh Shah +3
RSC Advances6 Oct 2026Peer-reviewedCC BY-NCFull text33 citedOrganic chemistryHAL

Cite

BibTeX RIS

BibTeX

@article{reynoso2026effect,
  title = {{Effect of the Preparation Method on Oxidation Over Time of Supported Cu0 Nanoparticles}},
  author = {A.J. Reynoso and L. Djakovitch and S. Loridant and T. Epicier and N. Perret},
  journal = {ChemCatChem},
  year = {2026},
  month = may,
  doi = {10.1002/cctc.202501587},
  url = {https://hal.science/hal-05644053v1},
  note = {CC BY-NC-ND 4.0},
}

RIS

TY  - JOUR
TI  - Effect of the Preparation Method on Oxidation Over Time of Supported Cu0 Nanoparticles
AU  - A.J. Reynoso
AU  - L. Djakovitch
AU  - S. Loridant
AU  - T. Epicier
AU  - N. Perret
PY  - 2026
DA  - 2026/05/29
JO  - ChemCatChem
DO  - 10.1002/cctc.202501587
UR  - https://hal.science/hal-05644053v1
AB  - Given the recognized instability of copper in air and the propensity of metal nanoparticles to undergo oxidation under ambient conditions, this study compares the stability of Cu nanoparticles supported on TiO2 synthesized by two methods: the aqueous reduction method and the wet impregnation followed by H2 reduction method. Over a period of four months, the solids were subjected to extensive characterization by x-ray diffraction (XRD), N2O chemisorption, H2-TPR and x-ray photoelectron spectroscopy (XPS). Raman analysis and electron energy loss spectroscopy (EELS) were also employed to map the oxidation states of Cu. Catalytic activity in acceptor-less dehydrogenation of 2-octanol was evaluated. The results demonstrate that the Cu nanoparticles prepared by aqueous reduction with NaBH4 are not fully reduced after synthesis, compared to the one reduced with H2. The oxidation occurs first in the outer layer, then progressively extend to the core. The catalyst prepared by aqueous reduction showed a higher Cu dispersion which resulted in higher 2-octanone productivity.
SN  - 1867-3880
SN  - 1867-3899
ER  -

Abstract

Related

Cite