Jiang, LeiFernández García, SusanaTinoco Rivas, MiguelYan, ZhaoxiaYue, QiBlanco, GinesaCalvino, José JuanHungría, Ana BelénChen, Xiaowei2024-01-232024-01-232017Lei Jiang, Susana Fernandez-Garcia, Miguel Tinoco, Zhaoxia Yan, Qi Xue, Ginesa Blanco, Jose J. Calvino, Ana B. Hungria, and Xiaowei Chen ACS Applied Materials & Interfaces 2017 9 (22), 18595-18608 DOI: 10.1021/acsami.7b050361944-824410.1021/acsami.7b05036https://hdl.handle.net/20.500.14352/94697Ceria 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.engjournal articlehttps://doi.org/10.1021/acsami.7b05036restricted access546Química inorgánica (Química)2210.01 Catálisis