Method for hydrogen production and storage through catalysis of water splitting by MOF composite electrode

A composite electrode, MOF technology, applied in the direction of electrode shape/type, electrolysis process, electrolysis components, etc., can solve problems such as hindering the construction and improvement of hydrogen energy system, poor atom economy, low energy efficiency, etc., to promote research and industrialization process. , mild suction and release conditions, good experimental results

Active Publication Date: 2014-11-05
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hydrogen storage methods are roughly divided into five types, namely, liquid hydrogen storage, high-pressure hydrogen storage, organic compound hydrogen storage, metal compound hydrogen storage and adsorption hydrogen storage. There are obvious defects: a huge hydrogen infrastructure is required, the cost is high, Poor economy and other issues, there is still a long way to go before realizing commercial application
Moreover, the large-scale preparation, transportation and filling of hydrogen and other supporting foundations require high construction costs and long periods of time.
Most of the existing hydrogen production processes and hydrogen storage technologies are high-emission and low-energy-efficiency processes, with poor atomic economy and unsustainable. With the intensification of the demand for hydrogen in the energy field, the sustainability of sources and the efficiency of storage and transportation Problems such as flexibility and flexibility are emerging day by day, becoming key factors hindering the construction and improvement of hydrogen energy systems

Method used

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  • Method for hydrogen production and storage through catalysis of water splitting by MOF composite electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] Firstly, the 1cm×8cm nickel mesh was washed in acetone, pickling solution (HNO 3 :H 2 O=1:3, volume ratio) and distilled water were ultrasonically treated for 20 minutes to remove impurities such as oil and oxides on the surface of the nickel mesh, and a mixture of MOF-5 and graphite powder with a mass ratio of 1:2 was placed in an agate mortar Mix, add 10ml of absolute ethanol, ultrasonically disperse for 30 minutes, then add a certain amount of polytetrafluoroethylene dispersion (PTFE, 60%) under heating and constant stirring, evaporate the alcohol until the mixture becomes a paste, and then prepare A good MOF active mixture is coated on the treated nickel mesh, loaded into a special mold, and pressed into a 1mm thick sheet under a certain pressure. o C roasting for 4h, cooled and taken out for later use. Take 1mol / L sulfuric acid solution as the electrolyte and place it in a closed electrolytic cell, pass N 2 Gas for 10 minutes to remove the air mixed in the elect...

Embodiment approach 2

[0029] Firstly, the 1cm×8cm nickel mesh was washed in acetone, pickling solution (HNO 3 :H 2 O=1:3, volume ratio) and distilled water were ultrasonically treated for 20 minutes to remove impurities such as oil and oxides on the surface of the nickel mesh, and a mixture of Cu-BTC and graphite powder with a mass ratio of 1:1 was placed in an agate mortar Mix, add 10ml of absolute ethanol, ultrasonically disperse for 30 minutes, then add a certain amount of polytetrafluoroethylene dispersion (PTFE, 60%) under heating and constant stirring, evaporate the alcohol until the mixture becomes a paste, and then prepare A good MOF active mixture is coated on the treated nickel mesh, loaded into a special mold, and pressed into a 1mm thick sheet under a certain pressure. o C roasting for 4h, cooled and taken out for later use. Take 1mol / L sulfuric acid solution as the electrolyte and place it in a closed electrolytic cell, pass N 2 Gas for 10 minutes to remove the air mixed in the elec...

Embodiment approach 3

[0033] Firstly, the 1cm×8cm nickel mesh was washed in acetone, pickling solution (HNO 3 :H 2O=1:3, volume ratio) and distilled water were ultrasonically treated for 20 minutes to remove oil and oxide impurities on the surface of the nickel mesh, and a mixture of Cu-BTC and superconducting carbon black with a mass ratio of 1:2 was placed in the agate laboratory. Mix in a bowl, add 10ml of absolute ethanol, ultrasonically disperse for 30 minutes, then add a certain amount of polytetrafluoroethylene dispersion (PTFE, 60%) under heating and constant stirring, evaporate the alcohol until the mixture becomes a paste, and then Apply the prepared MOF active mixture on the treated nickel mesh, put it into a special mold, and press it into a 1mm thick sheet under a certain pressure. o C roasting for 4h, cooled and taken out for later use. Take 0.5mol / L NaCl solution as the electrolyte and place it in a closed electrolytic cell, pass N 2 Gas for 10 minutes to remove the air mixed in t...

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Abstract

The invention relates to a method for hydrogen production and storage through catalysis of water splitting by an MOF (metal-organic framework) composite electrode. The method utilizes the unsaturated metal sites and the porous structure of MOF to conduct electrocatalysis on water splitting so as to produce hydrogen, and the produced hydrogen is stored in an MOF porous material on line, thus realizing integration of hydrogen production and storage. The method greatly reduces the hydrogen production overpotential, is simple in operation and is easy to control, storage and release of hydrogen are realized through charge and discharge, the absorption and desorption conditions are mild, the current efficiency is greater than or equal to 75%, and the electrochemical hydrogen storage capacity can reach 920mAh/g. The method provided by the invention realizes synchronization of hydrogen production and storage, and greatly promotes the research and industrialization process of the water splitting technology for hydrogen production and storage.

Description

technical field [0001] The present invention relates to a method for hydrogen production by water splitting, and also relates to a method for hydrogen storage after water splitting for hydrogen production; furthermore, it is a technical proposal for a hydrogen production and storage method using MOF composite electrodes to catalyze water splitting . Background technique [0002] As an efficient and clean renewable energy, hydrogen energy has been generally considered as an ideal pollution-free green energy. The three key issues that need to be solved for the effective development and utilization of hydrogen energy are hydrogen production, storage and application. As a new technology research for future energy development, hydrogen production technology has attracted people's attention and has broad market prospects. At present, the method of obtaining hydrogen in industry is mainly to pyrolyze oil and natural gas. These methods all need to consume a lot of energy. Water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/03
CPCY02E60/36
Inventor 梁镇海杨慧敏潘大海刘宪杜海燕杨太来代红艳
Owner TAIYUAN UNIV OF TECH
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