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Cadmium-based chalcogenide nanorod, preparation method of nanorod, electrocatalyst and application

A technology of chalcogenides and electrocatalysts, applied in selenium/tellurium compounds, chemical instruments and methods, binary selenium/tellurium compounds, etc., to achieve low cost, high stability, and easy regulation

Inactive Publication Date: 2018-10-30
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are various catalytic materials for the electroreduction of carbon dioxide, current catalysts cannot produce a wide range of syngas fractions at high current densities.

Method used

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  • Cadmium-based chalcogenide nanorod, preparation method of nanorod, electrocatalyst and application
  • Cadmium-based chalcogenide nanorod, preparation method of nanorod, electrocatalyst and application
  • Cadmium-based chalcogenide nanorod, preparation method of nanorod, electrocatalyst and application

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Embodiment 1

[0026] A cadmium-based chalcogenide nanorod proposed by the present invention is a cadmium sulfide nanorod, and the cadmium sulfide nanorod has a diameter of 5-6 nm and a length of 120-170 nm.

[0027] The present invention also proposes a preparation method of the cadmium-based chalcogenide nanorods, comprising the following steps: dissolving the cadmium salt in anhydrous ethylenediamine, stirring evenly to obtain a mixed solution A; adding sulfur powder and hydrazine hydrate In the mixed solution A, the mixed solution B was obtained after stirring; the mixed solution B was subjected to solvothermal reaction at 150° C. for 10 h, cooled, centrifuged, washed and dried after the reaction to obtain the cadmium-based chalcogenide nanorods.

[0028] The present invention also proposes an electrocatalyst whose effective components include the cadmium-based chalcogenide nanorods.

[0029] The invention also proposes an application of the electrocatalyst in the catalytic reaction of e...

Embodiment 2

[0031] A cadmium-based chalcogenide nanorod proposed by the present invention is a cadmium sulfur selenide alloy nanorod, and the diameter of the cadmium sulfur selenide alloy nanorod is 6-7nm, and the length is 70-110nm; wherein, in In the sulfur-cadmium selenide alloy nanorods, the molar ratio of sulfur and selenium is 3:1, that is, the molar fraction of sulfur is 75% of the total molar number of sulfur and selenium.

[0032]The present invention also proposes a preparation method of the cadmium-based chalcogenide nanorods, comprising the following steps: dissolving cadmium nitrate in anhydrous ethylenediamine, stirring evenly to obtain a mixed solution A; mixing sulfur powder, selenium powder, Hydrazine hydrate was added to the mixed solution A, and the mixed solution B was obtained after stirring; the mixed solution B was subjected to solvothermal reaction at 130° C. for 15 hours, cooled, centrifuged, washed, and dried after the reaction to obtain the cadmium-based chalcoge...

Embodiment 3

[0037] A cadmium-based chalcogenide nanorod proposed by the present invention is a cadmium sulfur selenide alloy nanorod, and the diameter of the cadmium sulfur selenide alloy nanorod is 5-7nm, and the length is 70-170nm; wherein, in In the sulfur cadmium selenide alloy nanorod, the molar ratio of sulfur and selenium is 1:1, that is, the molar fraction of sulfur is 50% of the total molar number of sulfur and selenium.

[0038] A preparation method of the cadmium-based chalcogenide nanorod proposed by the present invention comprises the following steps: dissolving 1.5mmol cadmium chloride in 20mL anhydrous ethylenediamine, stirring evenly to obtain mixed solution A; mixing sulfur powder and Mix selenium powder to obtain mixed powder; add 1.5mmol mixed powder and 2mL hydrazine hydrate into mixed solution A, stir for 35min to obtain mixed solution B; carry out solvothermal reaction for mixed solution B at 130°C for 15h, cool after the reaction, and then Centrifuge at 8000 rpm for...

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Abstract

The invention discloses a cadmium-based chalcogenide nanorod, preparation, an electrocatalyst, application and an application method. The cadmium-based chalcogenide nanorod is one of a cadmium sulfoselenide alloy nanorod, a cadmium sulfide nanorod or a cadmium selenide nanorod. The cadmium-based chalcogenide nanorod has the diameter of 5-7nm and the length of 70-170nm. The preparation method of the cadmium-based chalcogenide nanorod comprises the following steps: dissolving a cadmium salt into anhydrous ethylenediamine, and uniformly stirring to obtain a mixed solution A; adding sulfur powderand / or selenium powder and hydrazine hydrate into the mixed solution A, and stirring to obtain a mixed solution B; carrying out a solvothermal reaction on the mixed solution B, and performing after-treatment. The preparation method of the cadmium-based chalcogenide nanorod disclosed by the invention is capable of easily realizing large-scale synthesis and low in cost, the obtained nanorod serves as a catalyst of a carbon dioxide electroreduction catalytic reaction, the activity and stability are high, the selectivity of the catalysate is easily regulated, high current density is maintained, and mixed gas of carbon monoxide and hydrogen with an adjustable ratio in a wide range can be obtained.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a cadmium-based chalcogenide nanorod, a preparation method, an electrocatalyst, an application and an application method. Background technique [0002] Syngas is a mixture of carbon monoxide and hydrogen. Different industrial processes, such as Fischer-Tropsch synthesis, methanol synthesis, etc., require different composition ratios of synthesis gas. In recent years, existing technologies have used different types of nanomaterials (gold nanoparticles, palladium nanoparticles, silver nanoparticles, tungsten diselenide nanosheets, molybdenum sulfoselenide alloy nanosheets, etc.) for electroreduction of carbon dioxide to produce syngas A lot of research has been carried out. For example, "Science" (Science 2016, 353, 467-470) reported that tungsten diselenide nanosheets electroreduce carbon dioxide in water and ionic liquid mixed electrolyte to obtain a mixture of carbon monoxid...

Claims

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Application Information

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IPC IPC(8): C01B19/00C01B19/04C01G11/02C25B1/00C25B1/04C25B11/06
CPCC01B19/002C01B19/04C01G11/02C01P2004/16C01P2004/62C01P2004/64C25B1/00C25B1/04C25B11/095Y02E60/36
Inventor 赵新宇何嵘张安曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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