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Application of modified UiO-66-NH2 material as proton conduction material
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A uio-66-nh2, proton conduction technology, used in the analysis of materials, material analysis by electromagnetic means, fuel cells, etc., to achieve high conductivity value and improve the effect of proton conductivity
Pending Publication Date: 2021-08-03
WUHAN UNIV
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UiO-66-NH 2 With excellent thermal stability, water resistance, acid and alkali resistance and other properties, it has attracted widespread attention as a proton-conducting material, but its proton conductivity has ultra-high conductivity compared to currently reported (>10 -1 S cm -1 ) MOF materials still have a certain gap, so it is necessary to study the modification method to improve its performance
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Embodiment 1
[0033] (1) UiO-66-NH 2 Preparation of:
[0034] Add 20g of zirconiumtetrachloride and 40g of 2-aminoterephthalic acid into 200mL of N,N-dimethylformamide, and add 5mL of 0.6mol / L hydrochloric acid, react at 80°C for 6h, and obtain a light yellow powder The solid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 60°C to obtain UiO-66-NH 2 ;
[0035] (2) UiO-66-NH 2 modification of:
[0036] UiO-66-NH 2 5g, 2.5g of isophthalaldehyde and 2.5g of 3,5-diamino-1,2,4-triazole were added to 50mL of N,N-dimethylformamide, and reacted at 25°C for 2h to obtain The dark yellow powdersolid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 40°C to obtain the modified UiO-66-NH 2 .
Embodiment 2
[0038] UiO-66-NH 2 Prepare with embodiment 1;
[0039] UiO-66-NH 2 5g, 2.5g of isophthalaldehyde and 5g of 3,5-diamino-1,2,4-triazole were added to 50mL of N,N-dimethylformamide, and reacted at 25°C for 2h, the obtained deep The yellow powdersolid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 40°C to obtain the modified UiO-66-NH 2 .
Embodiment 3
[0041] UiO-66-NH 2 Prepare with embodiment 1;
[0042] UiO-66-NH 2 5g, 5g of isophthalaldehyde and 2.5g of 3,5-diamino-1,2,4-triazole were added to 50mL of N,N-dimethylformamide, and reacted at 25°C for 2h, the obtained deep The yellow powder solid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 40°C to obtain the modified UiO-66-NH 2 .
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Abstract
The invention discloses an application of a modified UiO-66-NH2 material as a proton conduction material, and the modified UiO-66-NH2 material is obtained by carrying out a Schiff base reaction on m-phthalaldehyde, 3, 5-diamino-1, 2, 4-triazole and a -NH2 group on the surface of UiO-66-NH2. The UiO-66-NH2 is subjected to one-step modification by adopting a simple post-synthesis modification mode, the protonconductivity of the UiO-66-NH2 is improved, the modified UiO-66-NH2 material shows very high protonconductivity in a wide working temperature range, and the performance of the UiO-66-NH2 material is improved by three orders of magnitude compared with that of the unmodified UiO-66-NH2 material; the proton conductivity can still be kept almost unchanged in a long-term cycle test in a high-temperature and high-relative-humidity environment, and the material can be widely applied to electrochemical devices, sensors, fuel cells and the like as a potential proton conductor.
Description
technical field [0001] The invention relates to a modified UiO-66-NH 2 The application of the material as a proton conduction material belongs to the technical field of fuel cells. Background technique [0002] With the rapid development of the world economy, the continuous increase of global energy demand and the huge consumption of non-renewable resources have brought about a serious energy crisis. In this context, the development of new energy sources has become an urgent problem to be solved. The proton exchange membrane fuel cell has the advantages of high energy conversion rate, no pollution, no noise, etc., and is expected to become a green and sustainable energy source, and the proton exchange membrane is the core part of it. At present, the commercially used proton exchange membrane is mainly based on perfluorosulfonic acid (Nafion), which has a temperature higher than 10 at 60-80°C and 98%RH. -2 S cm -1 proton conductivity. However, Nafion is expensive, compli...
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