Nanometer porous gold composite electrode material modified by nanometer metal oxide and preparation method thereof

A nanoporous gold and nanometal technology, applied in nanotechnology, battery electrodes, nanotechnology, etc. for material and surface science, can solve the problems of loss of catalytic activity, high cost, poisoning, etc., and achieve improved anti-poisoning performance, The effect of low price and simple preparation process

Inactive Publication Date: 2015-08-19
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a nanoporous gold composite electrode material modified by nano metal oxides in order to solve technical problems such as easy generation of poisoning and loss of catalytic activity in the above-mentioned composite nanostructure material, and high cost. High catalytic activity, low cost, greatly improved anti-poisoning performance, prolonging the service life of electrodes

Method used

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  • Nanometer porous gold composite electrode material modified by nanometer metal oxide and preparation method thereof
  • Nanometer porous gold composite electrode material modified by nanometer metal oxide and preparation method thereof
  • Nanometer porous gold composite electrode material modified by nanometer metal oxide and preparation method thereof

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Embodiment 1

[0034] A nanoporous gold composite electrode material modified by nanometer metal oxides, that is, nanoscale metal oxides are filled in the pores of the nanoporous gold film, and the pore size of the nanoporous gold film needs to be the size of the metal oxide particle 2-4 times, the schematic diagram of its structure is as follows figure 1 as shown, figure 1 Among them, MxOy represents nanoscale metal oxides, and nanoporous gold represents nanoporous gold films;

[0035] Its pore size of described nanoporous gold film is 8nm, and porosity is 65%;

[0036] The metal oxide is Ce 2 o 3 .

[0037] A nanoporous gold composite electrode material modified by a nanometer metal oxide, which is prepared by a method comprising the following steps:

[0038] (1) Preparation of metal oxide sol:

[0039] The metal nitrate is Ce (NO 3 ) 3 Dissolve in pure water to obtain a metal salt solution with a concentration of metal Ce ions of 0.1 mM, then adjust the pH to 5 with ammonia water,...

Embodiment 2

[0046] A nanoporous gold composite electrode material modified by nanometer metal oxides, that is, nanoscale metal oxides are filled in the pores of the nanoporous gold film, and the pore size of the nanoporous gold film needs to be the size of the metal oxide particle 2-14 times;

[0047] The nanoporous gold film has a size of 40nm and a porosity of 50%;

[0048] The metal oxide is TiO 2 .

[0049] A nanoporous gold composite electrode material modified by a nanometer metal oxide, which is prepared by a method comprising the following steps:

[0050] (1) Preparation of metal oxide sol:

[0051] Dissolve the metal organic acid salt, namely ethyl titanate, in ethanol to obtain a metal salt solution with a concentration of metal Ti ions of 0.1M, then adjust the pH to 9 with ammonia water, and then add the surfactant polyvinyl alcohol-400 to make the surface After the concentration of the active agent polyvinyl alcohol-400 is 0.2M, emulsify at room temperature for 10 minutes ...

Embodiment 3

[0061] A nanoporous gold composite electrode material modified by nanometer metal oxides, that is, nanoscale metal oxides are filled in the pores of the nanoporous gold film, and the pore size of the nanoporous gold film needs to be the size of the metal oxide particle 13-60 times;

[0062] The nanoporous gold film has a pore size of 120nm and a porosity of 30%;

[0063] The metal oxide is Eu 2 o 3 .

[0064] A nanoporous gold composite electrode material modified by a nanometer metal oxide, which is prepared by a method comprising the following steps:

[0065] (1) Preparation of metal oxide sol:

[0066] Metal nitrate Eu (NO 3 ) 3 Dissolve in pure water to obtain a metal salt solution with a concentration of metal Eu ions of 0.5 mM, then adjust the pH to 6 with ammonia water, and then add the surfactant trimethyl phosphate to make the concentration of the surfactant trimethyl phosphate 0.4 After mM, emulsify at room temperature for 30 minutes to obtain a metal oxide wi...

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Abstract

The invention discloses a nanometer porous gold composite electrode material modified by a nanometer metal oxide and a preparation method thereof. In the nanometer porous gold composite electrode material modified by the nanometer metal oxide, a nano-scale metal oxide is filled into pores of a nanometer porous gold film; the pore diameter of the nanometer porous gold film is 2-60 times the particle size of the metal oxide; the pore diameter of the nanometer porous gold film is 8-120 nanometers, and the porosity is 30-65 percent; the metal oxide is at least one metal oxide of Ti, Co, Sn, Ce, Eu and Dy; and the particle size of the metal oxide is 2-15 nanometers. The nanometer porous gold composite electrode material modified by the nanometer metal oxide has high structural stability and efficient catalytic performance, and is low in cost. The poisoning resistance is improved greatly, and the service life of an electrode is prolonged. The nanometer porous gold composite electrode material has the advantages of simple preparation process, convenience in operation, high repeatability, environmental friendliness and easiness in batch production.

Description

technical field [0001] The invention relates to a nanometer metal oxide-modified porous gold composite electrode material and a preparation method thereof, belonging to the technical field of novel nanometer functional materials and catalysis. Background technique [0002] Nanoporous gold has the characteristics of bicontinuous internal structure, high specific surface area and good electrical conductivity, so it has unique physical, chemical and optical properties. Applications. However, as an electrode material, its electrocatalytic activity is limited by the pore size, which makes the catalytic sensitivity not high enough, and surface modification is required to improve its catalytic performance. [0003] At present, the commonly used method is to use chemical replacement, electroplating, underpotential deposition and other methods to modify noble metals and conductive polymers on the porous gold surface to form composite nanostructure materials. Chinese invention paten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/8846H01M4/9016H01M4/9041Y02E60/50
Inventor 陈爱英石珊珊卜钰潘登
Owner UNIV OF SHANGHAI FOR SCI & TECH
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