2026-06-08T12:24:23Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/931482025-03-18T15:02:35Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Jiang, Lei author Tinoco Rivas, Miguel author Fernández García, Susana author Sun, Yuijiao author Traviankina, Mariia author Nan, Pengli author Xue, Qi author Pan, Huiyan author Aguinaco, Almudena author González, Juan María author Blanco, Ginesa author Blanco, Eduardo author Hungría, Ana Belén author Calvino, José Juan author Chen, Xiaowei author 2021 In this work, a simple one-step thermal oxidation process was established to achieve a significant surface increase in {110} and {111} nanofacets on well-defined, pure and Pr-doped, ceria nanocubes. More importantly, without changing most of the bulk properties, this treatment leads to a remarkable boost of their enzymatic activities: from the oxidant (oxidase-like) to antioxidant (hydroxyl radical scavenging) as well as the paraoxon degradation (phosphatase-like) activities. Such performance improvement might be due to the thermally generated sawtoothlike {111} nanofacets and defects, which facilitate the oxygen mobility and the formation of oxygen vacancies on the surface. Finally, possible mechanisms of nanoceria as artificial enzymes have been proposed in this manuscript. Considering the potential application of ceria as artificial enzymes, this thermal treatment may enable the future design of highly efficient nanozymes without changing the bulk composition. Lei Jiang, Miguel Tinoco, Susana Fernández-García, Yujiao Sun, Mariia Traviankina, Pengli Nan, Qi Xue, Huiyan Pan, Almudena Aguinaco, Juan M. González-Leal, Ginesa Blanco, Eduardo Blanco, Ana B. Hungría, Jose J. Calvino, and Xiaowei Chen ACS Applied Materials & Interfaces 2021 13 (32), 38061-38073 DOI: 10.1021/acsami.1c09992 1944-8244 10.1021/acsami.1c09992 https://hdl.handle.net/20.500.14352/93148 https://doi.org/10.1021/acsami.1c09992 Enhanced Artificial Enzyme Activities on the Reconstructed Sawtoothlike Nanofacets of Pure and Pr-Doped Ceria Nanocubes