Institut des Matériaux Poreux de Paris, FRE 2000 CNRS, Ecole Normale Supérieure, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, PSL Research Université, 75005, Paris, France.
Institut Charles Gerhardt Montpellier, UMR 5253 CNRS ENSCM UM, Université Montpellier, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France.
Nat Commun. 2018 Nov 22;9(1):4937. doi: 10.1038/s41467-018-07414-4.
Proton conductive materials are of significant importance and highly desired for clean energy-related applications. Discovery of practical metal-organic frameworks (MOFs) with high proton conduction remains a challenge due to the use of toxic chemicals, inconvenient ligand preparation and complication of production at scale for the state-of-the-art candidates. Herein, we report a zirconium-MOF, MIP-202(Zr), constructed from natural α-amino acid showing a high and steady proton conductivity of 0.011 S cm at 363 K and under 95% relative humidity. This MOF features a cost-effective, green and scalable preparation with a very high space-time yield above 7000 kg m day. It exhibits a good chemical stability under various conditions, including solutions of wide pH range and boiling water. Finally, a comprehensive molecular simulation was carried out to shed light on the proton conduction mechanism. All together these features make MIP-202(Zr) one of the most promising candidates to approach the commercial benchmark Nafion.
质子传导材料对于清洁能源相关应用非常重要且备受关注。由于使用有毒化学品、配体制备不便以及最先进候选物的规模化生产复杂，发现具有高质子传导性能的实用型金属-有机框架（MOFs）仍然具有挑战性。在此，我们报告了一种由天然α-氨基酸构建的锆-MOF，MIP-202(Zr)，在 363K 和 95%相对湿度下具有 0.011 S cm 的高且稳定的质子电导率。该 MOF 具有成本效益、绿色和可扩展的制备方法，时空产率非常高，超过 7000 kg m day。它在各种条件下，包括宽 pH 范围的溶液和沸水，均表现出良好的化学稳定性。最后，进行了全面的分子模拟，以阐明质子传导机制。综上所述，这些特性使 MIP-202(Zr) 成为最有希望接近商业基准 Nafion 的候选材料之一。
