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首页> 美国卫生研究院文献>Elsevier Sponsored Documents >Mapping electrochemically driven gas exchange of mixed conducting SrTi0.7Fe0.3O3 − δ and Ce0.8Gd0.2O1.9 thin films by 18O tracer incorporation under reducing atmosphere
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Mapping electrochemically driven gas exchange of mixed conducting SrTi0.7Fe0.3O3 − δ and Ce0.8Gd0.2O1.9 thin films by 18O tracer incorporation under reducing atmosphere

机译：通过在还原性气氛下引入18O示踪剂绘制SrTi0.7Fe0.3O3-δ和Ce0.8Gd0.2O1.9混合导电薄膜的电化学驱动气体交换图

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Thermally and electrochemically driven 18O tracer exchange experiments in H2/H218O atmosphere were performed on SrTi0.7Fe0.3O3 − δ and Ce0.8Gd0.2O2 − δ thin films on single crystalline YSZ substrates. Noble metal current collectors were deposited on both films and electrochemically polarized during the exchange experiment. The resulting tracer distribution was analyzed by spatially resolved secondary ion mass spectrometry. Increased tracer fraction near the current collectors was found under cathodic polarization and decreased tracer fraction under anodic polarization. High cathodic bias leads to enhanced n-type electronic conductivity, which increases the extent of the electrochemically active zone.
机译：在H2 / H2 18 O气氛中对SrTi0.7Fe0.3O3-δ和Ce0.8Gd0.2O2-δ薄膜进行热和电化学驱动的 18 O示踪剂交换实验在单晶YSZ衬底上。在交换实验过程中，贵金属集电器均沉积在两个薄膜上，并被电化学极化。通过空间分辨二次离子质谱法分析所得的示踪剂分布。在阴极极化下发现集流体附近的示踪剂分数增加，而在阳极极化下发现示踪剂分数降低。高阴极偏压导致增强的n型电子电导率，从而增加了电化学活性区的范围。

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