期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 19, 页码 6327-6332出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201901384
关键词
electrocatalysis; enzyme mimetics; gold nanoparticle; nanocatalysis; nanozyme
资金
- National Natural Science Foundation of China [21775043, 214210047]
- Program of Introducing Talents of Discipline to Universities [B16017]
- Innovation Program of Shanghai Municipal Education Commission [2017-01-07-00-02-E00023]
- Fundamental Research Funds for the Central Universities [222201718001, 222201717003]
Gold nanoparticles (AuNPs) have been demonstrated to serve as effective nanomaterial-based enzyme mimetics (nanozymes) for a number of enzymatic reactions under mild conditions. The intrinsic glucose oxidase and peroxidase activities of single AuNPs and Ag-Au nanohybrids, respectively, were investigated by single NP collision electrochemical measurements. A significantly high turnover number of nanozymes was obtained from individual catalytic events compared with the results from the classical, ensemble-averaged measurements. The unusual enhancement of catalytic activity of single nanozymes is believed to originate from the high accessible surface area of monodispersed NPs and the high activities of carbon-supported NPs during single-particle collision at a carbon ultramicroelectrode. This work introduces a new method for the precise characterization of the intrinsic catalytic activities of nanozymes, giving further insights to the design of high-efficiency nanomaterial catalysts.
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