经过氧化后稳定的酸浸COF的高质子导电性
Chenxi Meng1, Yu Zhao2,3, Weidong Zhu2,3
1Department of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|November 25, 2024
概括
研究人员开发了一种新的胺结合的共价有机框架 (CPOF-11),可以显著提高燃料电池中的质子导电性. 这种材料与酸和硫酸具有更好的稳定性和导电性.
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
- 纳米技术 纳米技术
背景情况:
- 纳米孔中的质子导电对于理解生物运输和开发人工系统至关重要.
- 为酸 (H3PO4) 和硫酸 (H2SO4) 等强酸合成稳定,耐酸的框架仍然是一个挑战.
- 现有的基于 imine 的共价有机框架 (COF) 可能缺乏有效的质子导电应用所需的化学稳定性.
研究的目的:
- 为了提高基于 imine 的 COF 的化学稳定性,以提高质子导电性.
- 为了研究酸和硫酸在修改后的COF结构中的质子导电性.
- 探索这些材料在燃料电池应用中的潜力.
主要方法:
- 在氧化后的转化过程中,一种以胺为基础的COF (CPOF-10) 转化为一种与胺结合的COF (CPOF-11).
- 在CPOF-11框架中整合伊米达类组,以促进酸浸.
- 在不同温度下测量酸和硫酸合CPOF-11的质子导电性.
主要成果:
- 与CPOF-10相比,胺结合的CPOF-11表现出与酸的质子导电性是CPOF-10的十倍,在160°C时达到8.63 × 10−2 S cm−1.
- 在硫酸兴奋剂中,CPOF-11表现出极好的稳定性,在140°C时达到1.70 × 10−1 S cm−1的高质子导电性.
- 该H2SO4@CPOF-11系统显示了非常低的0.05 eV的激活能量,是对质子导体材料报告的最低值之一.
结论:
- 胺结合CPOF-11的氧化后合成显著提高了化学稳定性和质子导电性.
- 伊米达功能化的CPOF-11是液态质子导体的有希望的宿主,在燃料电池相关条件下提供卓越的性能.
- 这项研究为设计高效的能量转换技术的先进多孔有机材料提供了宝贵的见解.
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