Method for synthesizing copper-indium/carbon bimetal nano material through one-step reduction method and application of copper-indium/carbon bimetal nano material

Abstract

The invention belongs to the technical field of electrochemistry, and relates to bimetal nano material synthesis, in particular to a method for synthesizing a copper-indium / carbon bimetal nano material through a one-step reduction method. The method comprises the steps that indium chloride and copper chloride are dissolved in a diluted hydrochloric acid solution, the mixture is transferred into anisovolumetric sodium citrate water solution, carbon black is added during stirring, and ultrasonic dispersion is conducted; evenly-scattered suspension liquid in an ice bath is sharply stirred, a freshly-prepared sodium borohydride solution is slowly dripped in, stirring at the intermediate speed is conducted for 1-3 h, products are centrifuged and washed many times, vacuum drying at the temperature ranging from 60 DEG C to 80 DEG C is conducted for 12-24 h, and then the copper-indium / carbon bimetal nano material is obtained. The operation technology is simple and practicable, the reaction time is short, and industrialization implementation is easy. When a prepared copper-indium / carbon bimetal nano material electrode is used for electrochemical reduction of CO2 in the solution, the excellent electrochemical activity and stability are shown, and especially, the electrochemical reduction CO2 activity of a Cu<1.0>In<1.5> / C samples is the best. According to the prepared bimetal nano material electrode, raw materials are cheap and easy to obtain, toxicity is avoided, and the environment friendliness requirement is met.

Description

technical field

[0001] The invention belongs to the technical field of electrochemistry and relates to the synthesis of bimetallic nanomaterials, in particular to the synthesis of copper-indium / carbon bimetallic nanomaterials by a one-step reduction method and its application. Background technique

[0002] Electrochemical reduction of CO in solution 2 More and more people are familiar with generating the fuel needed by human beings to complete the artificial carbon cycle. But CO 2 It is very stable, and it is quite difficult to transform it. In the past few decades, in order to effectively use CO 2 Electrolysis, that is, overcoming competing reactions, has been extensively studied on electrocatalysts. Among them, the bulk phase Cu is the only one in the liquid electrolyte that can convert CO 2 Metal simple substance reduced to a variety of hydrocarbons such as methane, ethylene and other products. However, its disadvantages are relatively low activity and current densi...

Examples

Embodiment 1

[0030] The one-step reduction method synthesizes copper-indium / carbon bimetallic nanomaterial electrodes, including the following steps:

[0031] Step 1: Dissolve 1.5 mmol indium chloride in 20 mL, 0.1 M hydrochloric acid solution to form solution A;

[0032] Step 2: prepare 0.2 M citric acid solution with deionized water, i.e. solution B;

[0033] Step 3: Pour 20mL of solution A into 20mL of solution B under magnetic stirring, then add 212.8 mg of carbon black to form a suspension C, and ultrasonicate for 30 minutes until uniformly dispersed;

[0034] Step 4: Vigorously stir the uniformly dispersed suspension C in an ice bath, slowly drop into the newly prepared 25 mL, 0.6 M sodium borohydride solution to form a suspension D, and then stir at 200 rpm for 2 h;

[0035] Step 5: Centrifuge the suspension D at 10,000 rpm, wash the product with deionized water several times, and dry it under vacuum at 60 °C for 12 h to obtain the catalyst In 1.5 / C.

Embodiment 2

[0037] The one-step reduction method synthesizes copper-indium / carbon bimetallic nanomaterial electrodes, including the following steps:

[0038] Step 1: Dissolve 1.0 mmol copper chloride in 20 mL, 0.1 M hydrochloric acid solution to form solution A;

[0039] Step 2: prepare 0.2 M citric acid solution with deionized water, i.e. solution B;

[0040] Step 3: Pour 20mL of solution A into 20mL of solution B under magnetic stirring, then add 212.8 mg of carbon black to form a suspension C, and ultrasonicate for 30 minutes until uniformly dispersed;

[0041] Step 4: Vigorously stir the uniformly dispersed suspension C in an ice bath, slowly drop into the newly prepared 25 mL, 0.4 M sodium borohydride solution to form a suspension D, and then stir at 200 rpm for 2 hours;

[0042] Step 5: Centrifuge the suspension D at 10,000 rpm, wash the product with deionized water several times, and dry it in vacuum at 60 °C for 12 h to obtain the catalyst Cu 1.0 / C.

Embodiment 3

[0044] The one-step reduction method synthesizes copper-indium / carbon bimetallic nanomaterial electrodes, including the following steps:

[0045] Step 1: Dissolve 0.5 mmol indium chloride and 0.5 mmol copper chloride in 20 mL, 0.1 M hydrochloric acid solution to form solution A;

[0046] Step 2: prepare 0.2 M citric acid solution with deionized water, i.e. solution B;

[0047] Step 3: Pour 20mL of solution A into 20mL of solution B under magnetic stirring, then add 212.8 mg of carbon black to form a suspension C, and ultrasonicate for 30 minutes until uniformly dispersed;

[0048] Step 4: Vigorously stir the uniformly dispersed suspension C in an ice bath, slowly drop into the newly prepared 25 mL, 0.4 M sodium borohydride solution to form a suspension D, and then stir at 200 rpm for 2 hours;

[0049]Step 5: Centrifuge the suspension D at 10,000 rpm, wash the product with deionized water several times, and dry it in vacuum at 60 °C for 12 h to obtain the catalyst Cu 0.5 In ...

technical field

[0001] The invention belongs to the technical field of electrochemistry and relates to the synthesis of bimetallic nanomaterials, in particular to the synthesis of copper-indium / carbon bimetallic nanomaterials by a one-step reduction method and its application. Background technique

[0002] Electrochemical reduction of CO in solution 2 More and more people are familiar with generating the fuel needed by human beings to complete the artificial carbon cycle. But CO 2 It is very stable, and it is quite difficult to transform it. In the past few decades, in order to effectively use CO 2 Electrolysis, that is, overcoming competing reactions, has been extensively studied on electrocatalysts. Among them, the bulk phase Cu is the only one in the liquid electrolyte that can convert CO 2 Metal simple substance reduced to a variety of hydrocarbons such as methane, ethylene and other products. However, its disadvantages are relatively low activity and current densi...

Examples

Embodiment 1

[0030] The one-step reduction method synthesizes copper-indium / carbon bimetallic nanomaterial electrodes, including the following steps:

[0031] Step 1: Dissolve 1.5 mmol indium chloride in 20 mL, 0.1 M hydrochloric acid solution to form solution A;

[0032] Step 2: prepare 0.2 M citric acid solution with deionized water, i.e. solution B;

[0033] Step 3: Pour 20mL of solution A into 20mL of solution B under magnetic stirring, then add 212.8 mg of carbon black to form a suspension C, and ultrasonicate for 30 minutes until uniformly dispersed;

[0034] Step 4: Vigorously stir the uniformly dispersed suspension C in an ice bath, slowly drop into the newly prepared 25 mL, 0.6 M sodium borohydride solution to form a suspension D, and then stir at 200 rpm for 2 h;

[0035] Step 5: Centrifuge the suspension D at 10,000 rpm, wash the product with deionized water several times, and dry it under vacuum at 60 °C for 12 h to obtain the catalyst In 1.5 / C.

Embodiment 2

[0037] The one-step reduction method synthesizes copper-indium / carbon bimetallic nanomaterial electrodes, including the following steps:

[0038] Step 1: Dissolve 1.0 mmol copper chloride in 20 mL, 0.1 M hydrochloric acid solution to form solution A;

[0039] Step 2: prepare 0.2 M citric acid solution with deionized water, i.e. solution B;

[0040] Step 3: Pour 20mL of solution A into 20mL of solution B under magnetic stirring, then add 212.8 mg of carbon black to form a suspension C, and ultrasonicate for 30 minutes until uniformly dispersed;

[0041] Step 4: Vigorously stir the uniformly dispersed suspension C in an ice bath, slowly drop into the newly prepared 25 mL, 0.4 M sodium borohydride solution to form a suspension D, and then stir at 200 rpm for 2 hours;

[0042] Step 5: Centrifuge the suspension D at 10,000 rpm, wash the product with deionized water several times, and dry it in vacuum at 60 °C for 12 h to obtain the catalyst Cu 1.0 / C.

Embodiment 3

[0044] The one-step reduction method synthesizes copper-indium / carbon bimetallic nanomaterial electrodes, including the following steps:

[0045] Step 1: Dissolve 0.5 mmol indium chloride and 0.5 mmol copper chloride in 20 mL, 0.1 M hydrochloric acid solution to form solution A;

[0046] Step 2: prepare 0.2 M citric acid solution with deionized water, i.e. solution B;

[0047] Step 3: Pour 20mL of solution A into 20mL of solution B under magnetic stirring, then add 212.8 mg of carbon black to form a suspension C, and ultrasonicate for 30 minutes until uniformly dispersed;

[0048] Step 4: Vigorously stir the uniformly dispersed suspension C in an ice bath, slowly drop into the newly prepared 25 mL, 0.4 M sodium borohydride solution to form a suspension D, and then stir at 200 rpm for 2 hours;

[0049]Step 5: Centrifuge the suspension D at 10,000 rpm, wash the product with deionized water several times, and dry it in vacuum at 60 °C for 12 h to obtain the catalyst Cu 0.5 In ...

Images