An acid-stable hexaphosphate ester based metal-organic framework and its polymer composite as proton exchange membrane
An acid-stable hexaphosphate ester based metal-organic framework and its polymer composite as proton exchange membrane
复制标题
一种酸稳定的六磷酸酯基金属有机骨架及其作为质子交换膜的聚合物复合材料
DOI：
10.1039/c7ta00169j
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发表时间：
2017-07-07
影响因子：
11.9
通讯作者：
Zhu, Guangshan
中科院分区：
文献类型：
--
作者：
Cai, Kun;Sun, Fuxing;Zhu, Guangshan
质子交换膜（PEM）的使用是质子交换膜燃料电池（PEMFC）用于清洁能源应用的关键技术。近年来，金属有机骨架材料及其与聚合物的复合膜作为质子交换膜已成为该领域的研究热点之一。在本文中，一种新型的六磷酸酯基的MOF，JUC-200，通过肌醇六磷酸配体（植酸）和Zn（II）的反应制备的合成和质子传导性能进行了描述。JUC-200在pH = 2.0的溶液中显示出优异的耐水性和耐酸性，并且在80 ℃下显示出1.62 x 10（-3）S cm（-1）的质子传导率。此外，制备了聚（乙烯醇）（PVA）和JUC-200的聚合物复合膜，以用作具有不同质量百分比（X %，膜表示为JUC-200@PVA-X）的填料。这些膜的质子传导率的测量表明，JUC-200@PVA-10具有在50 ℃下1.25 × 10（-3）S cm（-1）的良好质子传导率的优点。据了解，这是第一个水稳定和酸稳定的复合材料制成的MOFs和聚合物作为质子交换膜。本研究为MOFs在PEMFC领域的进一步发展做出了一定的贡献。
Use of a proton exchange membrane (PEM) is a key technique in proton exchange membrane fuel cells (PEMFCs) for clean energy applications. Recently, use of metal-organic frameworks (MOFs) as well as their composite membranes with polymers as PEM have been one research focus in this area. In this paper, the synthesis and proton conductive properties of a novel hexaphosphate ester-based MOF, JUC-200, prepared by the reaction of the inositol hexaphosphoric ligand (phytic acid) and Zn(II) is described. JUC-200 shows excellent water tolerance and acid resistance in a solution of pH = 2.0, and exhibits a proton conductivity of 1.62 x 10(-3) S cm(-1) at 80 degrees C. Furthermore, the polymer composite membranes of poly(vinyl alcohol) (PVA) and JUC-200 were fabricated for use as fillers with different mass percentages (X%, the membrane denoted as JUC-200@PVA-X). The measurement of proton conductivity of these membranes shows that JUC-200@PVA-10 has the advantage of a good proton conductivity of 1.25 x 10(-3) S cm(-1) at 50 degrees C. As far as is known, this is the first water-stable and acid-stable composite made of MOFs and polymers as proton exchange membranes. This research may make some contribution to the further development of MOFs in the field of the PEMFCs.