Co (II) Boron Imidazolate Framework with Rigid Auxiliary Linkers for Stable Electrocatalytic Oxygen Evolution Reaction

被引:40
作者
Wen, Tian [1 ,2 ]
Zheng, Yao [2 ]
Zhang, Jian [1 ]
Davey, Kenneth [2 ]
Qiao, Shi-Zhang [2 ]
机构
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
[2] Univ Adelaide, Sch Chem Engn, Adelaide, SA 5005, Australia
基金
澳大利亚研究理事会;
关键词
boron imidazolate frameworks; confinement effects; metal-organic frameworks; oxygen evolution reaction; zeolite; METAL-ORGANIC-FRAMEWORK; STEPWISE SYNTHESIS; WATER-OXIDATION; EFFICIENT; CATALYST; CRYSTAL;
D O I
10.1002/advs.201801920
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Metal-organic frameworks (MOFs) have significant potential for practical application in catalysis. However, many MOFs are shown to be sensitive to aqueous solution. This severely limits application of MOFs in electrocatalytic operations for energy production and storage. Here, a Co (II) boron imidazolate framework CoB(im)(4)(ndc)(0.5)(BIF-91, im = imidazolate, ndc = 2,6-naphthalenedicarboxylate) that is rationally designed and successfully tested for electrocatalytic application in strong alkaline (pH approximate to 14) solution is reported. In such a BIF system, the inherent carboxylate species segment large channel spaces into multiple domains in which each single channel is filled with ndc ligands through the effect of zeolite channel confinement. These ligands, with strong C-H center dot center dot center dot pi interaction, act as a rigid auxiliary linker to significantly enhance the structural stability of the BIF-91 framework. Additionally, the pi-conjugated effect in BIF-91 stabilizes dopant Fe (III) at the atomic scale to construct Fe-immobilized BIF-91 (Fe@BIF-91). Due to the synergistic effect between Fe (III) guest and Co (II) in the framework, the Fe@BIF-91 acts as an active and stable electrocatalyst for the oxygen evolution reaction in alkaline solution.
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页数:5
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