Mechanochemical Activation of CeO2 in Order to Boost Physicochemical Properties for Catalytic Applications
Open Access
- 27 October 2023
- conference paper
- Published by MDPI AG in Engineering Proceedings
- Vol. 56 (1) , 49
Abstract
Mechanochemical activation, by means of high-energy ball milling, was applied to CeO2 as a strategy to enhance its physicochemical properties. Different milling times were screened to evaluate their effect on ceria. The fluorite-type structure of cerianite was maintained in all cases, no matter the amount of energy introduced by the milling process, as observed via X-ray diffraction (XRD). A decrease in crystallite sizes and a consequent increase in specific surface area (SBET) were observed through XRD and N2 sorption (BET method). Pore diameters and total pore volumes were also in line with the duration of CeO2 milling. Moreover, redox properties and oxygen mobility studied through H2 temperature-programmed reduction (H2- TPR) showed an increase in reducibility with milling time, including signals of both bulk and surface ceria, due to the greater number of defects and/or oxygen vacancies achieved by mechanochemical activation. The obtained features could play an essential role in terms of metal–support interaction, reactant adsorption and/or oxygen supply during catalytic reactions. Thus, high-energy ball milling is a useful, simple and green method for the design of materials with catalytic applications.Keywords
Funding Information
- Universidad Nacional de San Luis (UNSL)
- Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT)
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
This publication has 12 references indexed in Scilit:
- Tailoring materials by high-energy ball milling: TiO2 mixtures for catalyst support applicationMaterials Today Chemistry, 2020
- The contributions of distinct Pd surface sites in palladium–ceria catalysts to low-temperature CO oxidationCrystEngComm, 2020
- Catalytic applications of cerium dioxide2020
- The effect of milling parameters on the mechanochemical synthesis of Pd–CeO2 methane oxidation catalystsCatalysis Science & Technology, 2019
- Ceria nanoparticles shape effects on the structural defects and surface chemistry: Implications in CO oxidation by Cu/CeO2 catalystsApplied Catalysis B: Environment and Energy, 2018
- Effect of Ceria on redox-catalytic property in mild condition: A solvent-free route for imine synthesis at low temperatureApplied Catalysis B: Environment and Energy, 2018
- Regulating the surface of nanoceria and its applications in heterogeneous catalysisSurface Science Reports, 2018
- Active sites contribution from nanostructured interface of palladium and cerium oxide with enhanced catalytic performance for alcohols oxidation in alkaline solutionJournal of Energy Chemistry, 2018
- Size effect of Pt nanoparticles on the catalytic oxidation of toluene over Pt/CeO2 catalystsApplied Catalysis B: Environment and Energy, 2018
- Estimation of lattice strain in nanocrystalline RuO2 by Williamson–Hall and size–strain plot methodsSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2016