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Single oriented iridium oxide nano array preparation and membrane electrode construction method

A nano-array and nano-tube array technology, which is applied in the field of single-orientation iridium oxide nano-array preparation and membrane electrode construction, can solve the problems of cumbersome operation and achieve the effect of reducing ring damage and retaining the shape of nano-array

Active Publication Date: 2017-12-19
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the transfer, in addition to removing the template, the original substrate needs to be peeled off, and the operation is cumbersome.

Method used

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  • Single oriented iridium oxide nano array preparation and membrane electrode construction method
  • Single oriented iridium oxide nano array preparation and membrane electrode construction method
  • Single oriented iridium oxide nano array preparation and membrane electrode construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing an iridium oxide nano-array and a membrane electrode, comprising the steps of:

[0041] Step (1): Preparation of titanium dioxide nanotube arrays by anodic corrosion method

[0042] A titanium sheet with a size of 35mm*10mm and a thickness of 0.1mm was pickled in hydrochloric acid with a mass fraction of 10% at 80°C for 10 minutes, and then rinsed several times with deionized water. The titanium sheets after pickling were polished with No. 600, No. 1000, No. 2000 and No. 3000 metallographic sandpaper in sequence, and ultrasonically cleaned in absolute ethanol and deionized water for 10 minutes in sequence.

[0043] The polished and cleaned titanium sheet is used as the positive electrode, the platinum sheet is used as the negative electrode, and 25ml of hydrofluoric acid aqueous solution with a mass fraction of 0.3% is used as the electrolyte, and a voltage of 10V is applied to electrochemically oxidize for 1 hour to obtain a titanium dioxide nano...

Embodiment 2

[0054] A method for preparing an iridium oxide nano-array and a membrane electrode, comprising the steps of:

[0055] Step (1) Preparation of titanium dioxide nanotube arrays by anodic corrosion method

[0056] A titanium sheet with a size of 35mm*10mm and a thickness of 0.2mm was pickled in hydrochloric acid with a mass fraction of 10% at 80°C for 10 minutes, and then rinsed several times with deionized water. The titanium sheets after pickling were polished with No. 600, No. 1000, No. 2000 and No. 3000 metallographic sandpaper in sequence, and ultrasonically cleaned in absolute ethanol and deionized water for 10 minutes in sequence.

[0057] The polished and cleaned titanium sheet is used as the positive electrode, the platinum sheet is used as the negative electrode, and 25ml of hydrofluoric acid aqueous solution with a mass fraction of 0.1% is used as the electrolyte, and a voltage of 20V is applied to electrochemically oxidize for 1 hour to obtain a titanium dioxide nanot...

Embodiment 3

[0066]A method for preparing an iridium oxide nano-array and a membrane electrode, comprising the steps of:

[0067] Step (1) Preparation of titanium dioxide nanotube arrays by anodic corrosion method

[0068] A titanium sheet with a size of 35mm*10mm and a thickness of 0.5mm was pickled in hydrochloric acid with a mass fraction of 10% at 80°C for 10 minutes, and then rinsed several times with deionized water. The titanium sheets after pickling were polished with No. 600, No. 1000, No. 2000 and No. 3000 metallographic sandpaper in sequence, and ultrasonically cleaned in absolute ethanol and deionized water for 10 minutes in sequence.

[0069] The polished and cleaned titanium sheet was used as the positive electrode, the platinum sheet was used as the negative electrode, and 25ml of hydrofluoric acid aqueous solution with a mass fraction of 0.5% was used as the electrolyte, and a voltage of 30V was applied to electrochemically oxidize for 1 hour to obtain a titanium dioxide na...

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Abstract

The invention discloses a single oriented iridium oxide nano array preparation and membrane electrode construction method. The method comprises the following steps: 1) preparing a titanium dioxide nanotube array by a titanium sheet through an anode corrosion method; 2) filling the titanium dioxide nanotube array with iridium oxide; 3) performing hot pressing of the titanium dioxide nanotube array deposited with iridium oxide on a Nafion polymer membrane to obtain a membrane electrode subassembly without removal of a template; and 4) using different mass fractions of hydrofluoric acid for corrosion of the membrane electrode subassembly without removal of the template in the step 3) in order, and removing the metallic titanium and titanium dioxide nanotube array in the template step by step. The conductive titanium dioxide nanotube array is selected as the template, a step of conductive pre-treatement of a porous template is avoided, and the titanium dioxide nanotube array is removed through a two-step method, and the template is removed under the condition that the iridium oxide nano array is not damaged.

Description

Technical field: [0001] The invention belongs to the technical field of electrocatalysts, and in particular relates to a single-orientation iridium oxide nano-array preparation method and a membrane electrode construction method. Background technique: [0002] In the field of electrocatalysis research, compared with disordered nanomaterials, nano-ordered array materials with a single orientation have better electronic conductivity and better mass transfer channels in electrode reactions, and can improve the utilization of catalysts. rate, reducing the loading of the catalyst. In the field of noble metal catalysts, it is more important to construct single-orientation nano-array structures. As an anode catalyst for water splitting, iridium oxide exhibits excellent activity and stability in the anode reactions of water electrolysis and water photolysis. Therefore, highly ordered iridium oxide nanoarrays have great potential in electrocatalysis and photoelectrocatalysis. Wide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/10G01N27/333
Inventor 闫常峰卢卓信史言郭常青王志达谭弘毅
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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