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Preparation and application of carbon-supported palladium-tin nano-alloy catalyst in electrocatalytic reduction of carbon dioxide

A technology of nano-alloy and carbon dioxide, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, electrode, etc., can solve the problem of low formic acid selectivity, and solve the problem of low formic acid selectivity and preparation The method is simple and the effect of high application prospect

Inactive Publication Date: 2018-07-24
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of preparation of carbon-supported palladium-tin nano-alloy catalyst and its application in carbon dioxide electrocatalytic reduction, by preparing a kind of carbon-supported palladium-tin nano-alloy catalyst To solve the problem of low selectivity of formic acid in the reaction of electrocatalytic conversion of carbon dioxide to generate formic acid in the prior art

Method used

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  • Preparation and application of carbon-supported palladium-tin nano-alloy catalyst in electrocatalytic reduction of carbon dioxide

Examples

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Embodiment 1

[0048]Get palladium acetate, tin acetate, wherein the molar ratio of Pd in ​​palladium acetate and Sn in tin acetate is 1:5, add 500mg carbon nanotubes and mix for the first time, wherein the mass of Pd in ​​palladium acetate and carbon nanotubes The ratio is 10:100 (10%), and the mixture is sonicated in an ultrasonic machine for 1h. Then add 5g of PVA as a stabilizer and 20ml of 0.5M ethylene glycol as a reducing agent for the second mixing, and stir vigorously for 5 hours at a temperature of 25°C. After the second mixing and centrifugation, the solid product was washed three times with deionized water, and vacuum-dried at 50° C. for 24 hours to obtain a carbon-supported palladium-tin nano-alloy catalyst. The catalyst is used for the potentiostatic reduction of CO 2 , the applied voltage is -1.45V, and the reaction time is 1h, the products of hydrogen, carbon monoxide and formic acid are obtained, and the faradaic current efficiency of formic acid reaches 81.0%, which has go...

Embodiment 2

[0050] Get palladium chloride, tin acetate, wherein the molar ratio of the Pd in ​​the palladium chloride and the Sn in the tin acetate is 1:5, add 500mg nano-carbon tubes and mix for the first time, wherein the Pd in ​​the palladium chloride and the nano-carbon The mass ratio of the tube is 10:100 (10%), and the mixture is sonicated in an ultrasonic machine for 1h. Then add 5g of PVA as a stabilizer and 20ml of 0.5M ethylene glycol as a reducing agent for the second mixing, and stir vigorously for 5 hours at a temperature of 25°C. After the second mixing and centrifugation, the solid product was washed three times with deionized water, and vacuum-dried at 50° C. for 24 hours to obtain a carbon-supported palladium-tin nano-alloy catalyst. The catalyst is used for the potentiostatic reduction of CO 2 , the applied voltage is -1.61V, and the reaction time is 1h, the products of hydrogen, carbon monoxide and formic acid are obtained, and the faradaic current efficiency of formic...

Embodiment 3

[0052] Get palladium acetate, stannous chloride, wherein the molar ratio of the Pd in ​​the palladium acetate and the Sn in the stannous chloride is 1:5, add 500mg carbon nanotubes and mix for the first time, wherein the Pd in ​​the palladium acetate and the nanometer The mass ratio of the carbon tubes is 10:100 (10%), and the mixture is sonicated in an ultrasonic machine for 1 hour. Then add 5g of PVA as a stabilizer and 20ml of 0.5M ethylene glycol as a reducing agent for the second mixing, and stir vigorously for 5 hours at a temperature of 25°C. After the second mixing and centrifugation, the solid product was washed three times with deionized water, and vacuum-dried at 50° C. for 24 hours to obtain a carbon-supported palladium-tin nano-alloy catalyst. The catalyst is used for the potentiostatic reduction of CO 2 , the applied voltage is -1.72V, and the reaction time is 1h, the products of hydrogen, carbon monoxide and formic acid are obtained, and the faradaic current ef...

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Abstract

The invention provides a preparation method of a carbon-supported palladium-tin nano-alloy catalyst, and the method comprises the following steps: 1) taking a palladium source and a tin source, addingcarrier carbon for first mixing; and 2) adding a stabilizer and a reducing agent for second mixing and separating, taking a solid product to wash and dry to obtain the desired catalyst. The inventionfurther provides application of the carbon-supported palladium-tin nano-alloy catalyst prepared by the method in electrocatalytic reduction of carbon dioxide. The carbon-supported palladium-tin nano-alloy catalyst prepared by the method has good electrocatalytic activity, high selectivity, high reproducibility, good stability and other advantages, and has a very high application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to the preparation of a carbon-supported palladium-tin nano-alloy catalyst and its application in electrocatalytic reduction of carbon dioxide. Background technique [0002] Since 1870, to the present day for CO 2 The reduction methods have been studied to varying degrees, such as catalytic hydrogenation reduction, radiation reduction, photochemical reduction, thermochemical reduction, electrochemical reduction and photoelectrochemical reduction. Although many CO 2 It is possible to realize the conversion and fixation process, but how to obtain CO 2 Reduction of the desired hydrogen source and CO at the lowest possible energy consumption 2 conversion? This is CO 2 Deal with difficult problems in technology that require deep thinking. Hydrogen in traditional reduction methods (catalytic copolymerization, high-temperature heterogeneous and homogeneous catalytic hydrogenation, et...

Claims

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Application Information

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IPC IPC(8): B01J23/62C25B3/04C25B11/08C25B3/25
CPCB01J23/626C25B3/25C25B11/061B01J35/393B01J35/33
Inventor 白晓芳陈为葛瑞鹏张佳舟马翠杰王白银宋艳芳魏伟孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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