中文摘要：

借助交流阻抗测试技术以及循环伏安、计时电流和扫描电镜方法,研究用Pt浆法制备Pt/YSZ电极过程中高温（850℃）烧制时间对其性能的影响。研究结果表明：在Pt/YSZ电极制作时,随着高温烧制时间的增加,电极界面阻抗和氧传感器响应时间均先减小后增大,当烧制时间为10 h时,电极阻抗最小,响应最快,活性最强;Pt/YSZ电极反应激活能受高温烧制时间的影响较小,为200~220 kJ/mol,其速率控制步骤可能为气相O2在PtOx/YSZ界面伴随电荷转移的解离过程。

英文摘要：

By means of complex AC impedance,cyclic voltammetry,chronoamperometry and SEM observation,the effects of the Pt/YSZ electrode sintering time at 850 ℃ during the preparing process with the platinum paste method on the characteristics of the electrode were studied.The results show that when the sintering time of the Pt/YSZ electrodes increase,both the interfacial resistances of the electrodes and the response time of the oxygen sensors decrease at first and then increase,the electrode sintered for 10 h has the least resistance,quickest response and best electrode activity;the activation energies of the electrode reactions on the Pt/YSZ electrodes are 200-220 kJ/mol,hardly affected by the sintering time,and the rate determining step（RDS） of the O2/O2- electrode reaction is supposed to be the dissociation of O2 involving a charge-transfer on Pt oxide/YSZ interface.