نتایج جستجو برای: doped ceria
تعداد نتایج: 49755 فیلتر نتایج به سال:
Molecular nanoprobes with intrinsic enzyme-like activity represent a new wave of technology for rapid and sensitive detection molecular targets. This work reports synthesis characterization novel well-dispersed europium-doped ceria nanocrystals (EuCe NCs) self-integrated catalytic fluorescence sensing functions. The NCs have an average size ∼5 nm exhibit bright stable more than 6 months in aque...
In the present study, sintering behavior and electrical conductivity of Sm doped Ceria (SDC) multi-doped (Sm/Pr/Li) electrolytes synthesized by microwave-assisted co-precipitation method is studied. SDC green pellet displayed a unimodal shrinkage with linear 15.67% along slight dedensification above 1350℃. An increase in an temperature from 1200 to 1300℃ was observed. Further increasing (1400 1...
Some oxygen defective fluorites are non-Newnham electrostrictors, i.e., the electromechanical response does not depend on their dielectric properties.
The effect of the suppport on oxidative dehydrogenation activity for vanadia/ceria systems is examined for the oxidation of methanol to formaldehyde by use of well-defined VO(x)/CeO(2)(111) model catalysts. Temperature-programmed desorption at low vanadia loadings revealed reactivity at much lower temperature (370 K) as compared to pure ceria and vanadia on inert supports such as silica. Densit...
The mechanism responsible for the irreversible deactivation of ceria-supported precious metals for the watergas-shift reaction has been investigated through accelerated aging tests. It is shown that deactivation of Pd/ ceria occurs more rapidly at 673 K compared to 523 K when operating with an integral reactor in 25 torr each of CO and H2O. By heating a fresh catalyst in H2, H2O, CO, or CO2, it...
The growth morphology and structure of ceria nano-islands on a stepped Au(788) surface has been investigated by scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). Within the concept of physical vapor deposition, different kinetic routes have been employed to design ceria-Au inverse model catalysts with different ceria nanoparticle shapes and arrangements. A two-dime...
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