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Method for preparing nano porous titanium dioxide thin film doped with Pd by constant voltage dealloying method on amorphous alloy stripe

A technology of amorphous alloy and dealloying method, which is applied in the field of preparation of new nanoporous thin film electrodes, can solve the problems of easy falling off, decreased catalytic ability, weak binding force, etc., and achieves strong controllability, simple operation, and low implementation cost Effect

Inactive Publication Date: 2013-04-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the deposition modification of noble metal Pd, the noble metal or agglomerates with too high loading amount will become the recombination center of photogenerated electrons and holes, and the binding force of noble metal particles with simple physical loading is relatively weak, and it is easy to fall off during use, thus decrease in catalytic ability

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  • Method for preparing nano porous titanium dioxide thin film doped with Pd by constant voltage dealloying method on amorphous alloy stripe
  • Method for preparing nano porous titanium dioxide thin film doped with Pd by constant voltage dealloying method on amorphous alloy stripe

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Embodiment 1

[0019] Embodiment 1: A kind of novel nanoporous material, it is characterized in that: Utilize constant voltage dealloying method to prepare nanoporous TiO doped with Pd on the surface of amorphous Ti-Cu-Pd alloy strip 2 thin film electrodes.

[0020] The so-called constant voltage dealloying method uses the Gamry Reference600 electrochemical workstation, adopts the traditional electrochemical three-electrode system, in which the Pt mesh electrode (2cm×2cm) is used as the counter electrode, and the saturated calomel electrode (SCE) is used as the reference electrode. Ti-Cu-Pd amorphous alloy strips coated with silica gel are used as working electrodes and prepared by electrochemical dealloying in nitric acid solution.

[0021] The process parameters used in the constant voltage dealloying corrosion process are:

[0022] Composition of Ti-Cu-Pd amorphous alloy (alloy element composition is calculated by atomic percentage): Ti: 30%; Cu: 69%; Pd: 1%

[0023] Electrolyte concent...

Embodiment 2

[0034] Embodiment 2: A kind of novel nanoporous material, it is characterized in that: Utilize constant voltage dealloying method to prepare nanoporous TiO doped with Pd on the surface of amorphous Ti-Cu-Pd alloy strip 2 thin film electrodes.

[0035] The so-called constant voltage dealloying method uses the Gamry Reference600 electrochemical workstation, adopts the traditional electrochemical three-electrode system, in which the Pt mesh electrode (2cm×2cm) is used as the counter electrode, and the saturated calomel electrode (SCE) is used as the reference electrode. Ti-Cu-Pd amorphous alloy strips coated with silica gel are used as working electrodes and prepared by electrochemical dealloying in nitric acid solution.

[0036]The process parameters used in the constant voltage dealloying corrosion process are:

[0037] Composition of Ti-Cu-Pd amorphous alloy (alloy element composition is calculated by atomic percentage): Ti: 30%; Cu: 67%; Pd: 3%

[0038] Electrolyte concentr...

Embodiment 3

[0049] Embodiment 3: A kind of novel nanoporous material is characterized in that: Utilize constant voltage dealloying method to prepare nanoporous TiO doped with Pd on the surface of amorphous Ti-Cu-Pd alloy strip 2 thin film electrodes.

[0050] The so-called constant voltage dealloying method uses the Gamry Reference600 electrochemical workstation, adopts the traditional electrochemical three-electrode system, in which the Pt mesh electrode (2cm×2cm) is used as the counter electrode, and the saturated calomel electrode (SCE) is used as the reference electrode. Ti-Cu-Pd amorphous alloy strips coated with silica gel are used as working electrodes and prepared by electrochemical dealloying in nitric acid solution.

[0051] The process parameters used in the constant voltage dealloying corrosion process are:

[0052] Composition of Ti-Cu-Pd amorphous alloy (alloy element composition is calculated by atomic percentage): Ti: 30%; Cu: 67%; Pd: 3%

[0053] Electrolyte concentrati...

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Abstract

The invention discloses a method for preparing a nano porous titanium dioxide thin film doped with Pd by a constant voltage dealloying method on a Ti-Cu-Pd amorphous alloy stripe, in order to provide a novel Pd-TiO2 composite electrode catalyst. A nano porous thin film structure with uniform pore distribution is prepared by steps of adopting a traditional electrochemical three-electrode system, using nitric acid solution as an electrolyte solution, and respectively applying a constant voltage to the amorphous alloy stripe to realize constant voltage electrochemical corrosion by Gamry Reference 600 electrochemical workstation. The method is low in implementation cost, simple and convenient to operate, strong in controllability, good in repeatability and low in reaction temperature, so that the method is an efficient and economic synthesis method.

Description

technical field [0001] The present invention relates to a preparation method of a novel nanoporous film electrode, more specifically, to a nanoporous TiO with high catalytic activity applied in the field of electrocatalysis 2 Preparation method of thin film electrode. Background technique [0002] At present, due to the increasingly severe energy shortage, people are beginning to look for green and efficient new fuels to replace traditional energy sources. Direct methanol fuel cells have the advantages of high energy density, low cost, and convenient storage and portability. They are considered to be a promising energy source and can be used in portable electronic devices and electronic vehicles. Pt-based catalysts are the most commonly used catalysts for methanol oxidation, but they are prone to adsorb oxidation intermediates such as CO during the reaction process and cause catalyst poisoning, and the high cost of Pt limits its commercial application. Pd-based catalysts h...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/10B01J37/34H01M4/92H01M4/88
CPCY02E60/50
Inventor 何茂山朱胜利崔振铎杨贤金刘涛
Owner TIANJIN UNIV
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