Electrical, thermal, and H2O and CO2 poisoning behaviors of PrNi0.5Co0.5O3-δ electrode for intermediate temperature protonic ceramic electrochemical cells
Electrical, thermal, and H2O and CO2 poisoning behaviors of PrNi0.5Co0.5O3-δ electrode for intermediate temperature protonic ceramic electrochemical cells
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中温质子陶瓷电化学电池 PrNi0.5Co0.5O3-δ 电极的电、热、H2O 和 CO2 中毒行为
DOI：
10.1016/j.ijhydene.2022.05.011
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发表时间：
2022
影响因子：
7.2
通讯作者：
Agarwal, Arvind
中科院分区：
文献类型：
--
作者：
Sozal, Md Shariful;Tang, Wei;Das, Suprabha;Li, Wenhao;Durygin, Andriy;Drozd, Vadym;Zhang, Cheng;Jafarizadeh, Borzooye;Wang, Chunlei;Agarwal, Arvind
PrNi0.5Co0.5O3-δ（PNC）在400-600 °C具有良好的总电导率（<300 S/cm），水分对其没有显著影响，热膨胀系数由XRD和XRD原位分析分别为17.6 × 10−6/K和18.43 × 10−6/K。PNC还表现出对H2O和CO2的化学稳定性。而质子导电的BaZr0.4Ce0.4Y0.1Yb0.1O3-δ（BZCYYb 4411）电解质的PNC对称电池在O2-N2混合气体中出现了明显的H2O和CO2中毒。相比之下，在类似条件下，具有PNC电极的对称电池在氧离子传导性Ce0.9Gd0.1O2-δ（GDC）电解质上没有显示出H2O和CO2中毒。推测PNC质子传导对称电池的H2O和CO2中毒是由于它们吸附在BZCYYb 4411电解质上而不是PNC电极上。通过程序升温脱附（TPD）测定了PNC和BZCYYb 4411粉末表面对H2O和CO2的吸附行为，证实了这一假设。
PrNi0.5Co0.5O3-δ(PNC) exhibits adequate total electrical conductivity (∼300 S/cm at 400–600 °C) and moisture has no significant effect on it. The thermal expansion coefficient of PNC is 17.6 × 10−6/K by dilatometry and 18.43 × 10−6/K byin situXRD. PNC also demonstrates chemical stability against H2O and CO2. However, PNC symmetrical cell over proton-conducting BaZr0.4Ce0.4Y0.1Yb0.1O3-δ(BZCYYb4411) electrolyte shows significant H2O and CO2poisoning when those are introduced into O2–N2mixture. In comparison, symmetrical cells with PNC electrode over the oxygen ion conducting Ce0.9Gd0.1O2-δ(GDC) electrolyte show no H2O and CO2poisoning under similar conditions. It is hypothesized that poisoning from H2O and CO2of the PNC proton conducting symmetrical cell is caused by their adsorption on the BZCYYb4411 electrolyte instead of PNC electrode. Such a hypothesis is supported by the H2O and CO2adsorption behaviors on PNC and BZCYYb4411 powder surfaces, as measured by temperature programmed desorption (TPD).