通过受控的酸浸,向金属有机框架材料赋予高质子导电性
Valentina G Ponomareva1, Konstantin A Kovalenko, Alexei P Chupakhin
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, 630128 Novosibirsk, Russian Federation.
Journal of the American Chemical Society
|September 11, 2012
概括
研究人员使用金属有机框架 (MOF) 为燃料电池开发了新的质子导体材料. 这些材料在适度温度下表现出高导电性,克服了技术的关键局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 燃料电池技术需要先进的质子导体材料,以实现高效的能量转换.
- 当前材料在中间温度 (高达120°C) 的导电性面临挑战,原因是水分子微观结构在沸点以上的不稳定性.
研究的目的:
- 开发用于燃料电池应用的新型固态质子导体.
- 为了克服现有的质子导体材料的温度限制.
主要方法:
- 用非易挥发性酸浸介质金属有机框架 (MOF) MIL-101:硫酸 (H(2) SO(4) 和酸 (H(3) PO(4).
- 由此产生的复合材料的质子导电性质的描述 (H(2) SO(4) @MIL-101和H(3) PO(4) @MIL-101).
主要成果:
- 合成的H ((2) SO ((4) @MIL-101和H ((3) PO ((4) @MIL-101在中等温度下表现出强大的质子导电特性.
- 这些基于MOF的材料在150°C和低湿度下表现出高质子导电性,超过其他MOF材料.
- 性能相当于像Nafion这样的最先进的质子导体.
结论:
- 将MOF MIL-101与非挥发性酸进行简单的浸,是制造高性能质子导体的有效策略.
- 这些材料对在适度温度下运行的车载汽车燃料电池的高效功能具有前景.
- 这项研究解决了阻碍技术广泛实施的关键材料研究挑战.
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