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Pt-CeO2 modified glassy carbon electrode and its application

A glassy carbon electrode, pt-ceo2 technology, applied in water/sewage treatment, sterilization/microdynamic water/sewage treatment, water/sludge/sewage treatment, etc. question

Inactive Publication Date: 2013-10-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, their preparation methods require high temperature or inert gas protection, and the method is complicated and difficult to control
It greatly affects its application in actual production

Method used

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  • Pt-CeO2 modified glassy carbon electrode and its application
  • Pt-CeO2 modified glassy carbon electrode and its application
  • Pt-CeO2 modified glassy carbon electrode and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Polish the glassy carbon electrode with gold sand photo paper and 0.05μm alumina powder to make the surface of the glassy carbon electrode appear mirrored;

[0024] 2) The polished glassy carbon electrode is sonicated in nitric acid solution (1:1), acetone, ethanol, and deionized water for 5 minutes to remove contaminants on the electrode surface;

[0025] 3) The pretreated glassy carbon electrode is used as the working electrode, the Pt electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode to form a three-electrode system, and cyclic voltammetric scanning is activated in 0.5mol / L sulfuric acid solution. The scanning range is -1~1V, the scanning speed is 50mv / s, and it stops when the cyclic voltammetry curve is stable;

[0026] 4) Place the three-electrode system at a concentration of 0.5mmol / L H 2 PtCl 6 And 5mmol / L Ce (NO 3 ) 3 In the solution of, carry out cyclic voltammetry scanning in the range of -0.6~0....

Embodiment 2

[0030] 1) Polish the glassy carbon electrode with gold sand photo paper and 0.05μm alumina powder to make the surface of the glassy carbon electrode appear mirrored;

[0031] 2) The polished glassy carbon electrode is placed in nitric acid solution (1:1), in sequence. Ultrasound in acetone, ethanol, and deionized water for 5 minutes to remove contaminants on the electrode surface;

[0032] 3) The pretreated glassy carbon electrode is used as the working electrode, the Pt electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode to form a three-electrode system, and cyclic voltammetric scanning is activated in 0.5mol / L sulfuric acid solution. The scanning range is -1~1V, the scanning speed is 50mv / s, and it stops when the cyclic voltammetry curve is stable;

[0033] 4) Place the three-electrode system at a concentration of 1.0mmol / L H 2 PtCl 6 And 10 mmol / L Ce (NO 3 ) 3 In the solution of, carry out cyclic voltammetry scann...

Embodiment 3

[0037] 1) Polish the glassy carbon electrode with gold sand photo paper and 0.05μm alumina powder to make the surface of the glassy carbon electrode appear mirrored;

[0038] 2) The polished glassy carbon electrode is placed in nitric acid solution (1:1), in sequence. Ultrasound in acetone, ethanol, and deionized water for 5 minutes to remove contaminants on the electrode surface;

[0039] 3) The pretreated glassy carbon electrode is used as the working electrode, the Pt electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode to form a three-electrode system, and cyclic voltammetric scanning is activated in 0.5mol / L sulfuric acid solution. The scanning range is -1~1V, the scanning speed is 50mv / s, and it stops when the cyclic voltammetry curve is stable;

[0040] 4) Put the three-electrode system in the containing 1.5mmol / L H 2 PtCl 6 And 15 mmol / L Ce (NO 3 ) 3 In the solution of, carry out cyclic voltammetry scanning in...

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Abstract

The invention discloses a Pt-CeO2 modified glassy carbon electrode and its application. According to the electrode, a glassy carbon electrode is used as a carrier, CeO2 is used as a cocatalyst, and Pt is used as an active component. The electrode is prepared by the following preparation step: chloroplatinic acid and a cerous nitrate solution are used as a precursor solution, and codeposition of Pt and CeO2 is carried out on the surface of the polished glassy carbon electrode within an appropriate voltage range by the utilization of a three-electrode system by a cyclic voltammetry method so as to prepare the Pt-CeO2 / GC electrode. The preparation of the electrode requires no addition of a surfactant, is easy to control, and has advantages of mild condition and simple technology. The prepared Pt-CeO2 modified glassy carbon electrode has excellent catalytic activity to ammonia nitrogen in an alkali system. The catalytic activity of the loaded Pt per unit mass to ammonia nitrogen is 0.975mC / microgram. Electrochemical active area of Pt per unit mass is 0.396cm<2> / microgram.

Description

[0001] technical field [0002] The invention relates to the preparation and application of an electrode material, in particular to a pt-CeO prepared by an electrochemical method 2 Modified glassy carbon electrode and its application in electrochemical oxidation of ammonia nitrogen. Background technique [0003] Industrial wastewater and agricultural irrigation wastewater contain a large amount of ammonia nitrogen, which will cause serious harm to the human body and the environment. The electrocatalytic oxidation technology can effectively decompose ammonia and reduce the emission of ammonia in the atmosphere and water; in addition, ammonia is a hydrogen-rich The carrier has an energy density of up to 3000wh / kg, and no toxic by-products such as CO are produced during the oxidative decomposition process, and is considered a promising green energy source. The use of electrocatalytic oxidation of ammonia can produce high-purity hydrogen and consume 95% less energy than hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C02F1/467C02F1/58
Inventor 李琴李宝菊崔皓安浩张秋翟建平
Owner NANJING UNIV
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