MnO2 catalysis of oxygen reduction to accelerate the degradation of Fe-C composites for biomedical applications

被引：37

作者：

Shuai, Cijun ^{[1
,2
,3
]}

Li, Sheng ^{[1
]}

Yang, Wenjing ^{[1
,2
]}

Yang, Youwen ^{[2
]}

Deng, Youwen ^{[4
]}

Gao, Chengde ^{[1
]}

机构：

[1] Cent South Univ, Coll Mech & Elect Engn, State Key Lab High Performance Complex Mfg, Changsha 410008, Peoples R China

[2] Jiangxi Univ Sci & Technol, Ganzhou 341000, Peoples R China

[3] Shenzhen Inst Informat Technol, Shenzhen 518172, Peoples R China

[4] Cent South Univ, Xiangya Hosp 2, Dept Emergency, Changsha 410011, Peoples R China

来源：

CORROSION SCIENCE | 2020年 / 170卷

关键词：

MnO2; catalyst; Biodegradation; Fe-C biocomposite; Cytocompatibility; Mechanical stability; BIODEGRADABLE MATERIALS; AIR ELECTRODE; CORROSION; MG; ELECTROCATALYSTS; NANOSTRUCTURES; NANOPARTICLES; ALLOY;

D O I：

10.1016/j.corsci.2020.108679

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

MnO2 catalysis of oxygen reduction was proposed to accelerate the degradation of Fe-C biocomposite. As an electron mediator, MnO2 was susceptible to obtaining electrons from anodic Fe by forming MnOOH, which then transferred the electrons to oxygen by reforming MnO2. This accelerated the oxygen reduction, thereby speeding up the anodic Fe dissolution. Consequently, Fe-C-MnO2 biocomposite displayed a high corrosion rate of 0.26 mm.y(-1). Additionally, the biocomposite showed high hardness with wear resistance and stable mechanical properties during degradation. Moreover, it possessed good cytocompatibility due to acceptable ion release. These findings demonstrated the potential bone implant applications of Fe-C-MnO2 biocomposite.

引用

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