Preparation method, product and application of self-supporting silver sulfide catalytic carbon dioxide reduction electrode material

A technology of silver sulfide catalyzing carbon dioxide and electrode materials, which is applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., and can solve problems affecting Faradaic efficiency, etc.

Active Publication Date: 2021-05-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total CO in aqueous solution 2 During the RR process, the hydrogen evolution reaction will interact with CO 2 RR competition, which will greatly affect the Faradaic efficiency

Method used

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  • Preparation method, product and application of self-supporting silver sulfide catalytic carbon dioxide reduction electrode material
  • Preparation method, product and application of self-supporting silver sulfide catalytic carbon dioxide reduction electrode material
  • Preparation method, product and application of self-supporting silver sulfide catalytic carbon dioxide reduction electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of ionic liquid system: Ethaline was selected as eutectic ionic liquid, and then 0.0005 mol of sulfur salt precursor (thiourea) was added to 50 mL of Ethaline, and the ionic liquid-sulfur salt composite was obtained after thorough stirring and mixing. electrolytic system;

[0030] (2) Substrate pretreatment: take silver flakes (1.5cm×1.5cm×0.1cm) as the substrate, silver soaked in dilute sulfuric acid (concentration is 2M dilute sulfuric acid for 15min), absolute ethanol (concentration is 95% absolute ethanol) soaking for 10 min), soaking in dilute sulfuric acid (1% dilute sulfuric acid soaking for 10 min), rinsing with deionized water to treat the surface of the substrate;

[0031] (3) Solvothermal method-low temperature vulcanization: use the substrate pretreated in step (2) as the working substrate, in the ionic liquid-sulfur salt composite electrolytic system prepared in step (1), vulcanize at a temperature of 353K for 2 hours, The vulcanized produc...

Embodiment 2

[0036](1) Preparation of ionic liquid system: select Reline as eutectic ionic liquid, then add 0.0005mol sulfur salt precursor (thiourea) into 50mL Reline, and get ionic liquid-sulfur salt composite after fully stirring and mixing electrolytic system;

[0037] (2) Substrate surface treatment: take silver sheet (1.5cm×1.5cm×0.05cm) as substrate, soak in dilute sulfuric acid (concentration is 2M dilute sulfuric acid for 15min), absolute ethanol (concentration is 95% absolute ethanol) 10 min), dilute sulfuric acid immersion (concentration is 1% dilute sulfuric acid immersion 10min), deionized water rinse to treat the surface of the substrate;

[0038] (3) Using the surface pretreated substrate in step (2) as the working substrate, in the ionic liquid-sulfur salt composite electrolytic system prepared in step (1), at a temperature of 353K and vulcanized for 2 hours, the vulcanized product was subjected to dehydrated alcohol, After washing with deionized water and drying, a silver...

Embodiment 3

[0040] (1) Preparation of ionic liquid system: choose Glyceline as eutectic ionic liquid, then add 0.00005 mol of sulfur salt precursor (thiourea) into 5 mL of Glyceline, stir and mix well to obtain ionic liquid-sulfur salt composite electrolytic system;

[0041] (2) Substrate surface treatment: take silver wire (φ=0.1cm) as the substrate, soak in dilute sulfuric acid (1% dilute sulfuric acid for 15 minutes), absolute ethanol (95% ethanol for 10 minutes), Soak in dilute sulfuric acid (concentration is 1% dilute sulfuric acid soak for 10min), rinse with deionized water to clean the substrate surface;

[0042] (3) Using the surface pretreated substrate in step (2) as the working substrate, in the ionic liquid-sulfur salt composite electrolytic system prepared in step (1), at a temperature of 353K and vulcanized for 2 hours, the vulcanized product was passed through absolute ethanol 1. Rinse with deionized water, and after drying, a silver sulfide film can be obtained on the sur...

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Abstract

The invention relates to a preparation method, product and application of a self-supporting silver sulfide catalytic carbon dioxide reduction electrode material, using a deep eutectic ionic liquid as a solvent, and adding a sulfur salt precursor to the deep eutectic ionic liquid according to a certain content After fully stirring and mixing uniformly, the ionic liquid-sulfur salt composite solution system is obtained. The temperature and sulfur content are controlled to carry out constant temperature vulcanization. The vulcanized silver substrate is washed with absolute ethanol and distilled water, and after drying, it can be obtained on the silver substrate. Supported silver sulfide thin film material, the present invention is suitable for various sulfur sources as vulcanizing agent, adopts one-step direct vulcanization method to prepare silver sulfide material, the electrode material has excellent catalytic carbon dioxide reduction activity and is suitable for aqueous solution and ionic liquid medium; the The silver sulfide material prepared by the method has the advantages of simple preparation method, mild condition, low cost, easy scale and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method, product and application of a self-supporting silver sulfide catalytic carbon dioxide reduction electrode material. Background technique [0002] The rapid depletion of fossil fuels, along with rising human populations and deforestation, are the main culprits for rising levels of carbon dioxide in the atmosphere. Excessive carbon dioxide concentration will exacerbate the greenhouse effect and lead to an increase in average temperature, posing a huge challenge to the global climate and environment. But in fact, carbon dioxide is also a potential carbon resource. CO 2 RR technology enables an ideal cycle of carbon resources by directly converting CO2 into value-added chemicals (CO, formate, hydrocarbons, oxygenates, etc.) using electricity generated from clean, renewable energy sources. [0003] Currently, CO 2 The bottleneck of RR ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/052C25B11/061C25B11/075C25B3/26C25B3/07C25B3/03C25B1/23
CPCB01J27/04B01J35/0033B01J35/026B01J35/1004C25B1/00C25B11/051C25B11/057C25B11/075
Inventor 张启波雷浩
Owner KUNMING UNIV OF SCI & TECH
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