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Download fileUniform and Porous Ce1–xZnxO2−δ Solid Solution Nanodisks: Preparation and Their CO Oxidation Activity
journal contribution
posted on 2016-02-20, 18:54 authored by Sheng-Liang Zhong, Lin-Fei Zhang, Lei Wang, Wei-Xin Huang, Cong-Min Fan, An-Wu XuWith increasing interest in new catalytic materials based
on doping
of ceria with lower-valence metal cation, in this paper, a series
of Ce1–xZnxO2‑δ (Ce–Znx) solid solution catalysts were prepared by a surfactant-free coprecipitation
method. The catalytic activity of ceria nanostructures was enhanced
by increasing density of oxygen vacancy defects in these catalysts
by doping. The morphology of the nanodisks can be facilely controlled
by changing reaction parameters such as dosage of reagent, reaction
time, and temperature. In addition, Ce–Znx catalyst supported with Au nanoparticles was also prepared,
and its activity for CO oxidation was greatly enhanced, due to the
acceleration of gas-phase oxygen activation and transferring via spillover.
It turns out that the synthesized Ce–Znx materials supported with Au nanoparticles exhibit excellent
activity for removing CO by catalytic oxidation with a 100% conversion
at 85 °C, demonstrating promising applications in environmental
remediation.