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Mechanism of pH-switchable peroxidase and catalase-like activities of gold, silver, platinum and palladium
Li JN(李军男); Li, JN; Liu, WQ; Wu, XC; Gao, XF; Gao XF(高兴发)
2015
发表期刊BIOMATERIALS
卷号48页码:37-44
通讯作者高兴发
文章类型Article
摘要Despite being increasingly used as artificial enzymes, little has been known for the origin of the pH-switchable peroxidase-like and catalase-like activities of metals. Using calculations and experiments, we report the mechanisms for both activities and their pH-switchability for metals Au, Ag, Pd and Pt. The calculations suggest that both activities are intrinsic properties of metals, regardless of the surfaces and intersections of facets exposed to environments. The pre-adsorbed OH groups on the surfaces, which are only favorably formed in basic conditions, trigger the switch between both activities and render the pH-switchability. The adsorption energies between H2O2 and metals can be used as convenient descriptors to predict the relative enzyme-like activities of the metals with similar surface morphologies. The results agree with the enzyme-mimic activities that have been experimentally reported for Au, Ag, Pt and predict that Pd should have the similar properties. The prediction, as well as the predicted activity order for the four metals, has been verified by the experimental tests. The results thus provide an in-depth insight into the peroxidase-like and catalase-like activities of the metals and will guide the de novo design, synthesis and application of artificial enzymes based on inorganic materials. (C) 2015 Elsevier Ltd. All rights reserved.
关键词Catalysts Density-functional calc. Metals Reaction mechanisms Surface
学科领域Engineering; Materials Science
DOI10.1016/j.biomaterials.2015.01.012
收录类别SCI ; EI ; CA
WOS类目Engineering, Biomedical ; Materials Science, Biomaterials
WOS记录号WOS:000350928600004
引用统计
被引频次:48[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228221
专题多学科研究中心
推荐引用方式
GB/T 7714
Li JN,Li, JN,Liu, WQ,et al. Mechanism of pH-switchable peroxidase and catalase-like activities of gold, silver, platinum and palladium[J]. BIOMATERIALS,2015,48:37-44.
APA 李军男,Li, JN,Liu, WQ,Wu, XC,Gao, XF,&高兴发.(2015).Mechanism of pH-switchable peroxidase and catalase-like activities of gold, silver, platinum and palladium.BIOMATERIALS,48,37-44.
MLA 李军男,et al."Mechanism of pH-switchable peroxidase and catalase-like activities of gold, silver, platinum and palladium".BIOMATERIALS 48(2015):37-44.
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