Synergy between platinum and oxygen vacancy in CeO2 boosting enzyme-mimicking activity

被引：3
|
作者：
Xiao, Jiao [1 ]
Yang, Xinyi [2 ]
Zhao, Xinshuo [1 ]
Qin, Fengmin [1 ]
Yang, Xiubo [3 ]
Cui, Lin [1 ]
Zhou, Zhan [4 ]
Lin, Dong [5 ]
Hu, Zunfu [2 ]
Qin, Yong [1 ,6 ]
Zhang, Jiankang [1 ]
机构：
[1] Northwestern Polytech Univ, Interdisciplinary Res Ctr Biol & Catalysis, Sch Life Sci, Xian 710072, Peoples R China
[2] Univ Shandong, Key Lab Adv Biomat & Nanomed, Linyi 276000, Peoples R China
[3] Northwestern Polytech Univ, Analyt & Testing Ctr, Xian 710072, Peoples R China
[4] Luoyang Normal Univ, Coll Chem & Chem Engn, Henan Key Lab Funct Oriented Porous Mat, Luoyang 471934, Henan, Peoples R China
[5] Cardiff Univ, Cardiff Catalysis Inst, Max Planck Cardiff Ctr Fundamentals Heterogeneous, Sch Chem, Cardiff CF103AT, Wales
[6] Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Peoples R China
来源：
BIOCHEMICAL ENGINEERING JOURNAL | 2024年 / 202卷
关键词：
Atomic layer deposition; Nanozymes; Pt-Ov synergy; Peroxidase activity; Degradation and antibiosis; NANOZYMES;
D O I：
10.1016/j.bej.2023.109165
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Reducible metal-oxide based nanozymes have received much attention in recent years due to their excellent and tunable enzyme-mimicking properties. Herein, porous CeO2 nanorods supported Pt-based nanozymes with specific content of oxygen vacancy (Ov) were synthesized by combining atomic layer deposition and te following hydrogen activation strategy, among which the Pt/CeO2-650R nanozymes with average particle size of 1.6 nm exhibit the optimized peroxidase activity in the typical H2O2-TMB reaction systems, whose specific activity is 3-fold higher than that of Pt/CeO2 counterparts. Besides, the reduced nanozymes also present excellent degra-dation and antibiosis properties. The activity enhancement is ascribed to the Pt-Ov synergy contributing to the stronger capability to generate active radical species. This work affords new insights for in-depth understanding metal-Ov synergy in nanozyme catalysis field.
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页数：8
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