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Effect of magnetic field on properties of AuPt particles magneto-electrodeposited on carbon paper
Jinqiu Zhang,Da Li,Miaomiao Chen,Maozhong An,Peixia Yang and Peng Wang
Harbin Institute of Technology,Harbin Institute of Technology,Harbin Institute of Technology,Harbin Institute of Technology,Harbin Institute of Technology,Harbin Institute of Technology
Abstract:
AuPt nano particles are bi-functional catalysts for Oxygen Reduction Reaction (ORR) and Oxygen Evolution Reaction (OER) that were taken place on air electrodes in lithium air batteries. Magnetic field has been applied during electrodeposition for the preparation of AuPt particles. With the increase of the magnetic flux density under constant current density, the grain size decreases from about 1μm to 200nm and the activity of the AuPt catalyst increases. The magnetic field oriented vertical to the electric field has a promotion effect on increasing the catalytic ability of AuPt/carbon electrode. By pulse plating, the grain size decreases to about 100nm. By adjusting parameters of the electric field and the magnetic field, controllable in-situ preparation of AuPt catalyst with various morphology and catalytic activity could be achieved.
Key words:  magneto-electrodeposition, catalyst, lithium-air battery, air electrode, pulse plating
FundProject:国家自然科学基金,中国博士后基金,其它
磁场对碳纸上磁电沉积的AuPt颗粒性能的影响
张锦秋,李达,陈苗苗,安茂忠,杨培霞,王鹏
哈尔滨工业大学,哈尔滨工业大学,哈尔滨工业大学,哈尔滨工业大学,哈尔滨工业大学,哈尔滨工业大学
摘要:
AuPt 纳米颗粒是一种催化锂空气电池空气电极上氧气还原反应和氧气析出反应的双功能催化剂。在电沉积制备AuPt颗粒的过程中施加了磁场,恒电流沉积条件下,随着磁场强度的增加,AuPt催化剂颗粒的粒径从1μm 减小到200nm,同时催化活性增大。垂直于电场方向的磁场有助于提高AuPt/C 空气电极的催化能力。使用脉冲电沉积,结晶粒径可减小至约100nm。通过调节电场和磁场参数,可原位制备具有不同形貌、不同组成和催化性能的AuPt催化剂。
关键词:  磁电沉积,催化剂,锂空气电池,空气电极,脉冲电沉积
DOI:10.1063/1674-0068/27/06/704-710
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