Synthesis and proton conductivity of heteropolyacids loaded Y-zeolite as solid proton conductors for fuel cell applications
Synthesis and proton conductivity of heteropolyacids loaded Y-zeolite as solid proton conductors for fuel cell applications
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DOI：
10.1016/j.micromeso.2005.10.029
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发表时间：
2006-04
影响因子：
5.2
通讯作者：
Mohd. Irfan Ahmad;S. Zaidi;S. Rahman;Shakeel Ahmed
中科院分区：
文献类型：
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作者：
Mohd. Irfan Ahmad;S. Zaidi;S. Rahman;Shakeel Ahmed
将不同质量分数的杂多酸(HPA)负载到Y型分子筛上，制备了一种新型固体质子导电材料。对合成条件进行了优化，以确保HPA完全负载到Y沸石结构上。制备的材料的质子电导率随着HPA在Y沸石上的负载量的增加而提高，并且受水的存在的影响很大，达到干燥条件下的20多倍。在室温下，含50wt%HPAs的全水合固体质子导体的电导率最高，为10−2S/cm。用红外光谱、扫描电子显微镜和X射线衍射仪对所制备的材料进行了表征，证实杂多酸的存在进入了Y型沸石结构。对粉末样品进行了浸出研究，证实实验中淋出的物质可以忽略不计，从而实现了HPAs几乎完全负载到Y沸石结构中。这种新材料结合了Y沸石的高热稳定性和结构稳定性以及HPA的出色导电性，使其成为最有前途的固体质子导体之一。
A novel solid proton conducting material has been prepared by loading various weight percentages of heteropolyacids (HPA) onto Y-zeolite. The synthesis conditions have been optimized to ensure complete loading of HPAs onto Y-zeolite structure. The proton conductivity of the prepared material enhanced with the loading of HPAs onto Y-zeolite and strongly affected by the presence of water, reaching to more than 20 times compared to dry conditions. The highest conductivity of the order of 10−2S/cm was found at room temperature for fully hydrated solid proton conductors containing 50wt.% HPAs. The prepared materials have been characterized by FT-IR, SEM and X-ray diffraction, which confirm the presence of heteropolyacids into Y-zeolite structure. Leaching study carried out on the powder samples, confirmed that the material leached out through the experiment was negligible and hence almost complete loading of HPAs into the Y-zeolite structures was achieved. The new material combines the high thermal and structural stability of Y-zeolite with outstanding conductivity of HPAs, which places them among one of the most promising solid proton conductors.