Superprotonic conductivity of Ti-based MOFs with Bronsted acid-base pairs

被引：12
|
作者：
Deng, Wei-Hua [1 ,2 ]
Kumar, P. Naresh [1 ]
Li, Wen-Hua [1 ,2 ]
Kashi, Chiranjeevulu [1 ]
Yao, Ming-Shui [1 ]
Wu, Guo-Dong [1 ]
Xu, Gang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
[2] Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
INORGANICA CHIMICA ACTA | 2020年 / 502卷
关键词：
Ti-based MOFs; Highproton conductivity; Bronsted acid-base pairs; METAL-ORGANIC FRAMEWORKS; PROTON CONDUCTION; CRYSTALLINE; SORPTION; DESIGN;
D O I：
10.1016/j.ica.2019.119317
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Fuel cells technology demands high and stable proton-conductivity electrolyte materials. Here we show an effective approach of H2SO4 impregnation into Ti-based metal-organic framework (Ti-MOFs, (NH2)(x)-MIL-125 (x = 0, 1 or 2)), attains high proton-conductivity. The proton conductivity increases for increased amino functional groups on H2SO4@(NH2)MIL-125 (x = 0,1 or 2). The superproton conductivity, attributed to the abundant dangled amino functional groups, through an enhanced Bronsted acid-base pairs with sulfonic acid. Notably, the H2SO4@(NH2)(2)-MIL-125 measured to be superprotonic conductivity of 2.2 x 10(-2) S cm(-1) under 98% RH &80 degrees C, thus competes with the most popular electrolyte, such as Nafion. In addition, the composite appeals required characteristics of easy operation, and good stability.
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页数：6
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