| Pt/YSZ电极烧制温度对其性能的影响 |
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| 引用本文： | 王光伟, 李和平, 徐丽萍, 张磊, 张艳清, 窦静. Pt/YSZ电极烧制温度对其性能的影响[J]. 工程科学学报, 2010, 32(1): 67-72. DOI: 10.13374/j.issn1001-053x.2010.01.021 |
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| 作者姓名： | 王光伟 李和平 徐丽萍 张磊 张艳清 窦静 |
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| 作者单位： | 中国科学院地球化学研究所地球深部物质与流体作用实验室,贵阳,550002;中国科学院研究生院,北京,100039;中国科学院地球化学研究所地球深部物质与流体作用实验室,贵阳,550002 |
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| 基金项目： | 国家自然科学基金;中国科学院科研装备研制项目;国家高技术研究发展计划（863计划） |
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| 摘 要： | 采用交流阻抗测试技术、循环伏安、计时电流和扫描电镜等实验方法,研究了Pt/YSZ电极烧制温度对其性能的影响.研究表明,随着烧制温度升高,电极过程激活能减小,电极总阻抗和响应时间均先减小后增大.烧制温度小于或等于1100℃时,氧原子大量吸附于Pt电极表面,与铂原子发生位置重排反应而生成Pt氧化物,电极过程激活能为177～230 kJ·mol-1;烧制温度大于1100℃时,电极系统中可能存在的Pt氧化物充分解离,电极过程激活能为107～172 kJ·mol-1.烧制温度为1000～1100℃所制电极总阻抗最小,电荷转移过程响应最快,电极活性最高.
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| 关 键 词： | Pt/YSZ电极 烧制温度 阻抗谱 循环伏安 计时电流 |
| 收稿时间： | 2009-05-09 |
Effects of Pt/YSZ electrode sintering temperature on its characteristics |
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| WANG Guang-wei, LI He-ping, XU Li-ping, ZHANG Lei, ZHANG Yan-qing, DOU Jing. Effects of Pt/YSZ electrode sintering temperature on its characteristics[J]. Chinese Journal of Engineering, 2010, 32(1): 67-72. DOI: 10.13374/j.issn1001-053x.2010.01.021 |
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| Authors: | WANG Guang-wei LI He-ping XU Li-ping ZHANG Lei ZHANG Yan-qing DOU Jing |
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| Abstract: | The effects of Pt/YSZ electrode sintering temperature on its characteristics were studied by AC impedance,cyclic voltammetry,chronoamperometry,and SEM observation.The result indicates that as the sintering temperature increases,the activation energy of the electrode process decreases,both the electrode total resistance and response time decrease first and then increase.While the sintering temperature is below or equal 1 100 ℃,a large quantity of oxygen atoms are adsorbed on the Pt electrode surface,Pt oxide will be found due to the site exchange reactions of the adsorbed oxygen atoms and Pt atoms,and the activation energy of the electrode process is from 177 to 230 kJ·mol-1;as the sintering temperature is above 1 100 ℃,Pt oxide probably existed in the electrode system decomposes completely,and the activation energy of the electrode process is from 107 to 172 kJ·mol-1.The electrode sintered at temperatures of 1 000 to 1 100 ℃ has the least total resistance,the shortest response time of charge transfer,and the highest activity. |
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| Keywords: | Pt/YSZ electrode sintering temperature impedance spectroscopy cyclic voltammetry chronoamperometry |
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