Preparation of ceria-zirconia solid solution with enhanced oxygen storage capacity and redox performance

Abstract

A new method called ultrasonic-assisted membrane reaction (UAMR) was reported for the fabrication of ceria-zirconia solid solution. A series of ceria-zirconia solid solutions with different Ce/Zr molar ratios were prepared by the UAMR method and characterized by Xray diffraction (XRD), N 2 adsorption, hydrogen temperature-programmed reduction (H 2 -TPR), scanning electron microscope (SEM), and transmission electron microscopy (TEM) techniques. The UAMR method proved to be superior, especially when the Ce/Zr molar ratio was lower than 1, in fabricating ceria-zirconia solid solutions with large BET surface area, high oxygen storage capacity (OSC), and low reduction temperature.

Silver nanoparticles supported on zirconia–ceria for the catalytic wet air oxidation of methyl tert-butyl ether

“…Similar type IV adsorption-desorption isotherms with evident hysteresis looped at higher relative pressure (P/P o ) were observed for all samples, indicating the characteristic of mesoporous materials with ink bottle pores, as dened by IUPAC. [38][39][40] As also observed, hysteresis indicates the presence of capillary condensation suggesting the presence of high-strength agglomerates (aggregates). 41 In Table 1, the dispersion of monometallic Ag catalyst determined by hydrogen pulse chemisorption and temperature programmed desorption under H 2 atmosphere is reported.…”

Catalytic Wet Air Oxidation (CWAO) of Phenol in a Fixed Bed Reactor Using Supported Ru and Ru‐Au Catalysts: Effect of Gold and Ce Loading

“…Synthesized metal supports and catalysts have typical pore networks belonging to isotherms type IV, a characteristic of mesoporous materials with pore bottleneck type, and also a hysteresis loop type H 1 presenting a narrow cycle, with adsorption branches parallel to desorption ones as defined by IUPAC ,. There are no values outside the trend in the crystal size of the synthesized materials, whose unimodal behaviour indicates that the sol‐gel method, used in the addition of CeO 2 , and the deposition‐precipitation method, used on Ru and Au deposition, are efficient in uniform and stable nanoparticles synthesis.…”

Synthesis of stable cerium zirconium oxide nanoparticle – Diesel suspension and investigation of its effects on diesel properties and smoke

“…The performance of catalytic nanoparticles depends on its Oxygen storage capacity (OSC) [30], which is the amount of oxygen stored in the catalyst. Temperature programmed reduction study (TPR) was carried out (Micromeritics Pulse Chemisorb-2705) to estimate the oxygen storage capacity of cerium zirconium mixed oxide nanoparticles.…”