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Novel Class of Proton Conducting Materials—High Entropy Oxides
ACS Materials Letters ( IF 9.6 ) Pub Date : 2020-09-09 , DOI: 10.1021/acsmaterialslett.0c00257
Maria Gazda 1 , Tadeusz Miruszewski 1 , Daniel Jaworski 1 , Aleksandra Mielewczyk-Gryń 1 , Wojciech Skubida 1 , Sebastian Wachowski 1 , Piotr Winiarz 1 , Kacper Dzierzgowski 1 , Marcin Łapiński 1 , Iga Szpunar 1 , Ewa Dzik 1
Affiliation  

Here, for the first time, we present data on proton conductivity of high-entropy, single-phase perovskites. The BaZr0.2Sn0.2Ti0.2Hf0.2Ce0.2O3−δ, BaZr0.2Sn0.2Ti0.2Hf0.2Y0.2O3−δ, BaZr1/7Sn1/7Ti1/7Hf1/7Ce1/7Nb1/7Y1/7O3−δ, and BaZr0.15Sn0.15Ti0.15Hf0.15Ce0.15Nb0.15Y0.10O3−δ single-phase perovskites were synthesized. Before electrical measurements, materials were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The following experimental results demonstrated that studied high-entropy perovskites are proton conductors: (1) The observed mass increase upon the switch from dry to wet atmosphere confirmed the water incorporation into materials structure. (2) The electrochemical impedance spectroscopy (EIS) revealed that the total conductivity increased while its activation energy decreased in the presence of water vapor in the atmosphere. (3) The conductivity in atmosphere humidified with H2O and D2O differed one from another, showing typical of proton conductors isotope effect in high-entropy oxides.

中文翻译:

新型的质子传导材料—高熵氧化物

在这里,我们首次提出了有关高熵单相钙钛矿质子传导率的数据。BaZr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Ce 0.2 O3 ,BaZr 0.2 Sn 0.2 Ti 0.2 Hf 0.2 Y 0.2 O3 ,BaZr 1/7 Sn 1/7 Ti 1/7 Hf 1/7 Ce 1 / 7 Nb 1/7 Y 1/7 O 3−δ和BaZr 0.15 Sn 0.15 Ti 0.15 Hf0.15 Ce 0.15 Nb 0.15 Y 0.10 O 3−δ合成了单相钙钛矿。在进行电学测量之前,使用X射线衍射(XRD),扫描电子显微镜(SEM),X射线光电子能谱(XPS)和热重分析(TGA)对材料进行表征。以下实验结果表明,所研究的高熵钙钛矿是质子导体:(1)从干燥气氛转变为湿气氛时观察到的质量增加证实了水结合到材料结构中。(2)电化学阻抗谱(EIS)显示,在大气中存在水蒸气时,总电导率增加而活化能降低。(3)H 2 O和D 2润湿的气氛中的电导率O彼此不同,表明在高熵氧化物中典型的质子导体同位素效应。
更新日期:2020-10-05
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