Rationally tuning host-guest interactions to free hydroxide ions within intertrimerically cuprophilic metal-organic frameworks for high OH- conductivity

被引：68

作者：

Li, Ziyin ^{[1
]}

Zhang, Zhangjing ^{[1
,2
]}

Ye, Yingxiang ^{[1
]}

Cai, Kaicong ^{[1
]}

Du, Fenfen ^{[1
]}

Zeng, Heng ^{[1
]}

Tao, Jin ^{[1
]}

Lin, Quanjie ^{[1
]}

Zheng, Ying ^{[1
]}

Xiang, Shengchang ^{[1
,2
]}

机构：

[1] Fujian Normal Univ, Coll Mat Sci & Engn, Fujian Prov Key Lab Polymer Mat, 32 Shangsan Rd, Fuzhou 350007, Peoples R China

[2] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2017年 / 5卷 / 17期

基金：

中国国家自然科学基金;

关键词：

ANHYDROUS PROTON CONDUCTIVITY; DESIGN; CRYSTALLINE; TRANSPORT; DEFECTS; RANGE; MEMBRANES; POLYMERS; SUBZERO; SENSOR;

D O I：

10.1039/c6ta11242k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hydroxide-anion-exchange membrane fuel cells (HEMFCs) are now considered as one of the most promising green energy-conversion technologies for stationary and mobile applications, showing high fuel conversion efficiency at high pH and low cost due to their ability to operate under basic conditions using non-precious metal catalysts. But one key impediment to commercialization is insufficient hydroxide ion (OH-) conductivity of the central HEM component. Here, we report the development of free OH- anion-containing metal-organic frameworks (FOMOFs) with rationally tunable host-guest interactions for HEMs with high OH- conductivity. Among three solids obtained by post-synthesis treatment of ultrastable MOF FJU-66 with various bases, free OH- anions are observed in FJU-66$ [EVIm] OH with strong host-guest interactions between the MOF backbone and guest cations. Despite the lowest OH- concentration, FJU-66$[EVIm] OH exhibits the highest OH- conductivity close to 0.1 S cm(-1). The high OH- conductivity achieved suggests the potential application of the FOMOFs for practical HEMs of fuel cells.

引用

页码：7816 / 7824

页数：9

共 25 条

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