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Method for enhancing synergistic oxidation of sodium sulfite and glucose by using platinum modified titanium dioxide electrode or nickel oxide electrode

A technology of titanium dioxide and sodium sulfite, applied in the field of electrochemical catalysis, can solve the problems of restricting the wide application of electrolyzed water and high power consumption, and achieve the effects of improving the utilization rate of precious metals, reducing production costs, and enhancing practical value

Pending Publication Date: 2021-12-28
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dependence of the cathodic hydrogen evolution reaction (HER) and the anodic oxygen evolution reaction (OER) on noble metals and the high overpotential in the water electrolysis reaction lead to high power consumption, which limits the wide application of electrolyzed water. In order to further reduce the hydrogen production The electricity consumption in the process reduces the overpotential of hydrogen evolution. Researchers began to use fuel cells for hydrogen evolution. Glucose, as a product of photosynthesis, has a high energy density and is an ideal renewable fuel. In the existing research Among them, researchers build fuel cells by adding ascorbic acid, nicotinamide adenine dinucleotide, etc. to oxidize glucose. The catalytic oxidation of glucose is conducive to accelerating hydrogen production, while the use of sodium sulfite to synergistically catalyze the oxidation of glucose is less researched.

Method used

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  • Method for enhancing synergistic oxidation of sodium sulfite and glucose by using platinum modified titanium dioxide electrode or nickel oxide electrode
  • Method for enhancing synergistic oxidation of sodium sulfite and glucose by using platinum modified titanium dioxide electrode or nickel oxide electrode
  • Method for enhancing synergistic oxidation of sodium sulfite and glucose by using platinum modified titanium dioxide electrode or nickel oxide electrode

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Effect test

Embodiment 1

[0028] Example 1 Preparation of platinum-modified titanium dioxide electrode and nickel oxide electrode

[0029] The platinum-modified titanium dioxide electrode of this embodiment is prepared by the following method:

[0030] (1) Weigh 0.03g of P25 high-purity titanium dioxide powder calcined at 450°C, add 3mL of absolute ethanol, put it into an ultrasonic cleaner and stir for 60 minutes, then dip the indium tin oxide ITO electrode in the above colloidal solution for 30 seconds, Then pull it up and dry it in a constant temperature box to make a titanium dioxide / ITO electrode;

[0031] (2) prepare 20mL 0.1mol / L potassium chloride solution, use this solution as supporting electrolyte to prepare 0.01mol / L chloroplatinic acid solution;

[0032] (2) Adopt constant potential method electrodeposition technology, reaction is carried out in three-electrode system, working electrode is the titanium dioxide / ITO electrode that above-mentioned step (1) makes, and counter electrode is tit...

Embodiment 2

[0038] Embodiment 2 Construction of electrocatalytic fuel cell

[0039]Using the platinum-modified titanium dioxide electrode or nickel oxide electrode prepared in Example 1 as the anode, the saturated calomel electrode as the reference electrode, and the porous nickel foam electrode as the cathode, a three-electrode electrode was constructed with the anode, cathode, reference electrode and electrochemical workstation. Chemical reaction system, add 0.5mol / L sodium sulfate (as supporting electrolyte solution), 0.1mol / L glucose (as fuel) and 0.1mol / L sodium sulfite (fuel and synergistic oxidation catalyst) to the anode chamber, add 0.5mol / L sodium sulfate solution, the cathode chamber and the anode chamber are connected with Nafion 117 proton exchange membrane to form an electrocatalytic fuel cell; wherein a plastic tube with a scale of 5 milliliters is added to the cathode chamber to cover the cathode electrode, and the closed plastic The nozzle is punched at the bottom of the...

Embodiment 3

[0042] Example 3 Platinum-modified titanium dioxide electrode and nickel oxide electrode enhance the synergistic oxidation of glucose by sodium sulfite

[0043] In order to further illustrate the synergistic oxidation of sodium sulfite to glucose in the electrocatalytic fuel cell constructed in Example 2, the specific steps are as follows:

[0044] (1) Using cyclic voltammetry electrochemical measurement technology, in the three-electrode system, the working electrode is a platinum-modified titanium dioxide electrode or a nickel oxide electrode, the counter electrode is a titanium electrode, and the reference electrode is a saturated calomel electrode;

[0045] (2) The following four solutions were filled into the anode chamber to clarify the role of platinum-modified titanium dioxide electrode in enhancing the oxidation of sodium sulfite and the synergistic oxidation of glucose by sodium sulfite. 1 is 0.5mol / L sodium sulfate solution, 0.1mol / L sodium sulfite and 0.1mol / L gluc...

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Abstract

The invention belongs to the technical field of electrochemical catalysis, and discloses a method for enhancing synergistic oxidation of sodium sulfite and glucose by using a platinum modified titanium dioxide electrode or a nickel oxide electrode. According to the invention, a platinum modified titanium dioxide electrode or nickel oxide / indium tin oxide electrode is used as an anode, and sodium sulfite is utilized to carry out synergistic oxidation on glucose, so that a fuel cell with fuel conversion efficiencies respectively reaching 86.4% and 81.9% is successfully constructed, and hydrogen on a porous foamed nickel cathode is separated out based on the fuel cell; the method is high in fuel conversion efficiency and simple and convenient to operate, the hydrogen evolution efficiency is greatly improved, and large-scale mass production is expected.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and particularly relates to a method for enhancing the synergistic oxidation of sodium sulfite and glucose by using a platinum-modified titanium dioxide electrode or a nickel oxide electrode. Background technique [0002] Due to the limited reserves of fossil fuels and the harmful ecological impact of burning them, there has been increasing interest in the efficient production of clean and sustainable energy to replace traditional energy sources. Common new energy sources include solar energy, wind energy, biomass energy, hydrogen energy, geothermal energy, etc. Hydrogen is the most abundant element on earth, and its chemical energy per unit mass is 142MJ kg -1 , Hydrogen energy can be produced by electrolysis of water. The water resources on the earth are extremely abundant, and the production of hydrogen by electrolysis of water has great advantages and broad application prosp...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/093C25B11/042
CPCC25B1/04C25B11/093C25B11/042Y02E60/36Y02E60/50
Inventor 叶梢冯文海李镜炬林威壮翁佳泳李红
Owner SOUTH CHINA NORMAL UNIVERSITY
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