Catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2, application and method for preparing formic acid by electrocatalytic reduction on CO2

A catalytic electrode, carbon dioxide technology, applied in the direction of electrode, electrolysis process, organic chemistry, etc., can solve the problems of copper element, unsatisfactory current efficiency, loss of catalytic activity, etc., to achieve the effect of simple steps, easy production and convenient operation

Inactive Publication Date: 2014-03-26
HUAZHONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the Kanan group has studied copper nanoparticles obtained by reducing cuprous oxide (Journal of The Electrochemical Society 158 (2011) E45-E49), which can significantly improve the current efficiency of its electrocatalytic reduction of carbon dioxide to carbon monoxide and formic acid. improve; but cuprous oxide is easy to turn into simple c

Method used

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  • Catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2, application and method for preparing formic acid by electrocatalytic reduction on CO2
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  • Catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2, application and method for preparing formic acid by electrocatalytic reduction on CO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] For electrocatalytic reduction of CO 2 Preparation of the catalytic electrode to formic acid:

[0027] Step 1: Incorporate commercial SnO 2 Vacuum heat treatment was carried out for 4 hours, the vacuum pressure was 2 Pa, and the treatment temperature was 200 ° C to obtain tin dioxide containing oxygen vacancies (SnO 2 (V)), the XRD diagrams before and after treatment are shown in figure 1 , the electron paramagnetic resonance spectrum see figure 2 ,Depend on figure 2 It can be seen from the results that after the vacuum heat treatment of tin dioxide, the electron paramagnetic resonance signal is stronger, indicating that oxygen vacancy defects are generated on the surface;

[0028] Step 2: The treated tin dioxide containing oxygen vacancies (SnO 2 (V)) was ultrasonically mixed and dispersed with 0.1 wt% Nafion solution to obtain SnO 2 (V) suspension with a mass concentration of 2wt%, and then apply the dispersed suspension to the surface of a glassy carbon shee...

Embodiment 2

[0032] For electrocatalytic reduction of CO 2 Preparation of the catalytic electrode to formic acid:

[0033] Step 1: Incorporate the SnO 2 Vacuum heat treatment was carried out for 3 hours, the vacuum pressure was 8 Pa, and the treatment temperature was 300 °C to obtain tin dioxide (SnO2) containing oxygen vacancies. 2 (V));

[0034] Step 2: SnO (SnO2) containing oxygen vacancies 2 (V)) is ultrasonically mixed and dispersed with 0.3wt% Nafion solution to obtain SnO 2 (V) The mass concentration of the suspension is 5wt%. The dispersed suspension is coated on the surface of the glassy carbon sheet, and it can be used for electrocatalytic reduction of CO after drying. 2 to the catalytic electrode for formic acid.

[0035] A method for catalytically reducing carbon dioxide to formic acid using the catalytic electrode:

[0036]In an electrolytic cell separated by a proton exchange membrane into an anode tank and a cathode tank, the above-mentioned catalytic electrode is used...

Embodiment 3

[0039] For electrocatalytic reduction of CO 2 Preparation of the catalytic electrode to formic acid:

[0040] Step 1: Incorporate the SnO 2 Vacuum heat treatment was carried out for 2 h, the vacuum pressure was 10 Pa, and the treatment temperature was 400 ° C to obtain tin dioxide containing oxygen vacancies (SnO 2 (V));

[0041] Step 2: SnO (SnO2) containing oxygen vacancies 2 (V)) was ultrasonically mixed and dispersed with 0.5 wt% Nafion solution to obtain SnO 2 (V) is a suspension with a mass concentration of 3wt%, and the dispersed suspension is coated on the surface of a glassy carbon sheet, and it can be used for electrocatalytic reduction of CO after drying. 2 to the catalytic electrode for formic acid.

[0042] The method of using the catalytic electrode to catalytically reduce carbon dioxide to formic acid: In an electrolytic cell separated by a proton exchange membrane into an anode tank and a cathode tank, the above-mentioned catalytic electrode is used as the...

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Abstract

The invention relates to a catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2, application and a method for preparing formic acid by electrocatalytic reduction on CO2. The catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2 comprises a glassy carbon sheet and a coating covering the glassy carbon sheet, wherein the material of the coating is stannic oxide containing oxygen vacancies, and the stannic oxide containing oxygen vacancies is obtained by performing vacuum thermal process on stannic oxide at 200-400 DEG C for 2-4 h. The catalysis electrode for preparing formic acid by electrocatalytic reduction of CO2 is applied to electrocatalytic reduction of CO2, and is capable of improving the rate and the current efficiency of preparing formic acid by electrocatalytic reduction of CO2. At the same electric potential, the rate of preparing formic acid by reducing CO2 by employing the catalysis electrode is increased by nearly 3 times compared with that by employing unprocessed catalysis electrodes, and the current efficiency is improved by nearly one time.

Description

technical field [0001] The invention relates to a method for electrocatalytic reduction of CO 2 Catalytic electrode to formic acid, application and method for electrocatalytic reduction of carbon dioxide to formic acid. Background technique [0002] Since the industrial revolution, the way of life and production of human society has undergone tremendous changes, and the demand and utilization of energy have increased day by day. At the same time, the problems of environment and energy depletion caused by the massive consumption of fossil fuels have become more and more serious. As the problem of global warming caused by the greenhouse effect becomes increasingly prominent, carbon dioxide, as a major greenhouse gas, has also received more and more attention. [0003] Under natural conditions, carbon dioxide in the atmosphere can be fixed through photosynthesis of plants and converted into sugars that can be used as energy substances, thereby completing the carbon cycle proce...

Claims

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Application Information

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IPC IPC(8): C25B3/04C25B11/06C07C53/02C25B3/25
Inventor 贾法龙张慧
Owner HUAZHONG NORMAL UNIV
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