Journal
NANO-MICRO LETTERS
Volume 11, Issue 1, Pages -Publisher
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-019-0324-7
Keywords
Biocatalysis; Nanozymes; Peroxidase mimic; Reaction mechanisms; Single-atom catalysts
Funding
- National Key Research and Development Program of China [2016YFA0200400]
- Jilin Province Science and Technology Development Program [20190201233JC]
- National Natural Science Foundation of China [51571100, 51872116]
- Natural Science Funds for Distinguished Young Scholars of Heilongjiang Province [JC2018004]
- Excellent Young Foundation of Harbin Normal University [XKYQ201304]
- National Postdoctoral Program for Innovative Talents [BX20180117]
- Program for JLU Science and Technology Innovative Research Team (JLUSTIRT) [2017TD-09]
- Fundamental Research Funds for the Central Universities
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The single-atom nanozyme is a new concept and has tremendous prospects to become a next-generation nanozyme. However, few studies have been carried out to elucidate the intrinsic mechanisms for both the single atoms and the supports in single-atom nanozymes. Herein, the heterogeneous single-atom Co-MoS2 (SA Co-MoS2) is demonstrated to have excellent potential as a high-performance peroxidase mimic. Because of the well-defined structure of SA Co-MoS2, its peroxidase-like mechanism is extensively interpreted through experimental and theoretical studies. Due to the different adsorption energies of substrates on different parts of SA Co-MoS2 in the peroxidase-like reaction, SA Co favors electron transfer mechanisms, while MoS2 relies on Fenton-like reactions. The different catalytic pathways provide an intrinsic understanding of the remarkable performance of SA Co-MoS2. The present study not only develops a new kind of single-atom catalyst (SAC) as an elegant platform for understanding the enzyme-like activities of heterogeneous nanomaterials but also facilitates the novel application of SACs in biocatalysis.
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