【摘要】 AuPt纳米颗粒是一和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荊,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200 nm,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100 nm,通过谓节电场和磁场參数,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。更多还原

【Abstract】 Au Pt nano particles are bi-functional catalysts for oxygen reduction reaction and oxygen evolution reaction that takes place on air electrodes in lithium air batteries. In this work,magnetic field was applied during electrodeposition for the preparation of Au Pt particles.With the increase of the magnetic flux density under constant current density, the grain size decreases from ～1 μm to 200 nm and the activity of the Au Pt catalyst increases. The magnetic field orienting vertically to the electric field has a promotion effect on increasing the catalytic ability of Au Pt/carbon electrode. By pulse plating, the grain size decreases to about100 nm. By adjusting parameters of the electric field and the magnetic field, controllable in situ preparation of Au Pt catalyst with various morphology and catalytic activity can be achieved.更多还原