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Electrode bimetal modification method

A metal modification, electrode technology, applied in the direction of material electrochemical variables, etc., can solve the problems of poor catalytic activity improvement effect, limited improvement of Pd electrode activity, low reaction activity, etc., to achieve electrode stability, simple modification method, and high catalytic activity. Effect

Active Publication Date: 2014-11-05
山东一开电气设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is: Au, Pt and Pd electrode are low to ethanol electrocatalytic oxidation reaction activity and Pt modification is poor to the improvement effect of Pd electrode catalytic activity, the problem that Au modification is very limited to the improvement range of Pd electrode activity

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Take 20mL double distilled water, 200μL 0.1mol·dm –3 Chlorauric acid and 53.2 μL of concentrated sulfuric acid (purity 98.0%) were added to a dry and clean 50 mL beaker to prepare a gold precursor solution containing 1 mmol dm –3 Chlorauric acid and 0.05mol dm –3 sulfuric acid.

[0026] (2) Take 20mL double distilled water, 200μL 0.1mol·dm –3 Chloroplatinic acid and 53.2 μL concentrated sulfuric acid (purity 98.0%) were added to a dry and clean 50 mL beaker to prepare a platinum precursor solution containing 1 mmol dm –3 Chloroplatinic acid and 0.05mol dm –3 sulfuric acid.

[0027] (3) Take 20mL double-distilled water, 118μL ethanol (purity ≥ 99.7%) and 0.4g sodium hydroxide (purity ≥ 96.0%) to a dry and clean 50mL beaker to prepare alcohol solution, which contains 0.1mol·dm –3 Ethanol and 0.5mol·dm –3 sodium hydroxide.

[0028] (4) Nitrogen gas is passed into the three solutions prepared above to discharge the oxygen dissolved therein.

[0029] (5) The surf...

Embodiment 2

[0034] (1) Take 20mL double distilled water, 200μL 0.1mol·dm –3 Chlorauric acid and 53.2 μL of concentrated sulfuric acid (purity 98.0%) were added to a dry and clean 50 mL beaker to prepare a gold precursor solution containing 1 mmol dm –3 Chlorauric acid and 0.05mol dm –3 sulfuric acid.

[0035] (2) Take 20mL double distilled water, 200μL 0.1mol·dm –3 Chloroplatinic acid and 53.2 μL concentrated sulfuric acid (purity 98.0%) were added to a dry and clean 50 mL beaker to prepare a platinum precursor solution containing 1 mmol dm –3 Chloroplatinic acid and 0.05mol dm –3 sulfuric acid.

[0036] (3) Take 20mL double-distilled water, 118μL ethanol (purity ≥ 99.7%) and 0.4g sodium hydroxide (purity ≥ 96.0%) to a dry and clean 50mL beaker to prepare alcohol solution, which contains 0.1mol·dm –3 Ethanol and 0.5mol·dm –3 sodium hydroxide.

[0037] (4) Nitrogen gas is passed into the three solutions prepared above to discharge the oxygen dissolved therein.

[0038] (5) The surf...

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Abstract

The invention relates to an electrode bimetal modification method. An electrode made in the invention is used for an electrolytic oxidation reaction of alcohol. The method comprises the following steps: preparing a gold precursor solution, preparing a platinum precursor solution, carrying out electrode surface modification, and using the electrode in the electrocatalytic oxidation reaction of ethanol. The electrode modification method is simple, the electrode is stable, the Pd electrode obtained after the modification of an extremely low amount of Au and Pt has a far higher electrocatalytic activity in the ethanol oxidation reaction in an alkaline solution than a Au, Pt and Pd electrode, a Au modified Pd electrode and a Pt modified Pd electrode; the modification amount of Au and Pt is extremely low, so the application amount of Au and Pt is saved; and the electrode made in the invention has a very high catalytic activity in the ethanol oxidation reaction in an alkaline medium, and has a very obvious modification effect.

Description

technical field [0001] The invention belongs to the technical field of electrochemical electrode materials, and relates to a method for modifying electrodes with two metals. Background technique [0002] The electrocatalytic oxidation of alcohols is one of the main areas of electrochemical research. For a long time, people have done a lot of research on methanol direct fuel cells, but methanol also has some shortcomings as a fuel for fuel cells, such as methanol has certain toxicity, low boiling point and easy to volatilize, small molecules can easily pass through the separation membrane in fuel cells, etc. Therefore, people are also actively carrying out research on selecting other alcohols as fuel cell raw materials, especially the electrocatalytic oxidation reactions of ethanol and ethylene glycol have attracted attention. In addition, with the rapid development of anion exchange membranes, research on alkaline fuel cells using electrocatalytic oxidation of alcohols in a...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48
Inventor 金长春王忠宇董如林
Owner 山东一开电气设备有限公司
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