%0 Journal Article
%A Jiang, Lei
%A Fernández García, Susana
%A Tinoco Rivas, Miguel
%A Yan, Zhaoxia
%A Yue, Qi
%A Blanco, Ginesa
%A Calvino, José Juan
%A Hungría, Ana Belén
%A Chen, Xiaowei
%T Improved Oxidase Mimetic Activity by Praseodymium Incorporation into Ceria Nanocubes
%D 2017
%@ 1944-8244
%U https://hdl.handle.net/20.500.14352/94697
%X Ceria nanocubes (NC) modified with increasing concentrations of praseodymium (5, 10, 15, and 20 mol %) have been successfully synthesized by a hydrothermal method. The as-synthesized Pr-modified ceria nanocubes exhibit an enhanced oxidase-like activity on the organic dye TMB within a wide range of concentrations and durations. The oxidase activity increases with increasing Pr amounts in Pr-modified ceria nanocubes within the investigated concentration range. Meanwhile, these Pr-modified ceria nanocubes also show higher reducibility than pure ceria nanocubes. The kinetics of their oxidase mimetic activity is fitted with the Michaelis–Menten equation. A mechanism has been proposed on how the Pr incorporation could affect the energy level of the bands in ceria and hence facilitate the TMB oxidation reaction. The presence of Pr3+ species on the surface also contributes to the increasing activity of the Pr-modified ceria nanocubes present higher oxidase activity than pure ceria nanocubes.
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