Carbon-loaded platinum-yttrium catalyst and preparation method and application thereof

A catalyst and platinum source technology, which is applied in the field of carbon-supported platinum yttrium catalyst and its preparation, can solve the problems of high equipment requirements, danger, and complicated process flow, and achieve the effects of low cost, mild preparation method conditions, and simple process

Active Publication Date: 2021-03-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

But at the same time, there is an obvious technical problem in this technical solution - the electrochemical corrosion method used is not only complicated in process flow, but more importantly, the electrochemical corrosion must be etched in 0.5M nitric acid
Among them, the use of nitric acid, a high-risk control drug, directly leads to the following two problems: 1. It is difficult to achieve large-scale preparation; 2. It

Method used

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  • Carbon-loaded platinum-yttrium catalyst and preparation method and application thereof
  • Carbon-loaded platinum-yttrium catalyst and preparation method and application thereof
  • Carbon-loaded platinum-yttrium catalyst and preparation method and application thereof

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Embodiment 1

[0044] A kind of hydrothermal reaction temperature is the preparation method of the carbon supported platinum yttrium catalyst of 150 ℃, comprises the following steps:

[0045] Step 1) Preparation of platinum yttrium material, put platinum acetylacetonate and yttrium acetylacetonate hydrate at a ratio of 2:1, put them in N,N-dimethylformamide for stirring and dispersing, and heat at 150°C Under the condition of hydrothermal reaction, the platinum yttrium solution containing platinum yttrium material can be obtained, which is named as PtY material;

[0046] To confirm the composition of the obtained PtY materials, XRD tests were carried out. Test results such as figure 1 As shown, the peaks with diffraction angles of 39.89, 46.40 and 67.71 correspond to the face-centered cubic structures (111), (200) and (220) of Pt. Therefore, the test results prove that there is single-phase platinum in the PtY material, but there is no Yttrium was detected.

[0047] Step 2) Preparation of...

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Abstract

The present invention discloses a carbon-loaded platinum-yttrium catalyst. Platinum acetylacetonate and yttrium acetylacetonate are used as a platinum source and a yttrium source, a platinum-yttrium material is obtained through a hydrothermal reaction, then the platinum-yttrium catalyst is obtained through carbon loading, and the obtained material has the low platinum content of 6.0-6.5%. The preparation method comprises the following steps: 1) preparing the platinum-yttrium material; and 2) preparing the carbon-loaded platinum-yttrium catalyst. When the carbon-loaded platinum-yttrium catalystis used as a fuel cell catalyst, the half-wave potential is 0.863 V, the mass activity is 0.09 Amg pt-1@0.9 V, and the electrochemical active surface area is 43-45 m2gpt-1. The whole technological process is simple, clean, environmentally friendly and free of danger, solves the problem of high raw material price, reduces platinum loading capacity and has excellent catalytic performance.

Description

technical field [0001] The invention belongs to the field of fuel cell catalysis, and in particular relates to a carbon-supported platinum yttrium catalyst and a preparation method and application thereof. Background technique [0002] With the rapid development of the world, the demand for energy is increasing day by day, and it is imminent to find a new energy source. As a new energy technology with high efficiency, low pollution and low cost, material battery has attracted extensive attention. At present, commercial battery catalysts are mainly Pt / C catalysts, which are expensive, which hinders the development of large-scale commercialization of proton exchange membrane fuel cells. [0003] The chloroplatinic acid impregnated inside and on the surface of Vulcan XC-72 carbon black was commercially reduced to platinum nanoparticles by chemical reduction method, and the half-wave potential of the prepared 40%Pt / C catalyst reached 0.868V. A disadvantage of materials obtained...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/92H01M4/88
CPCH01M4/926H01M4/921H01M4/9041H01M4/9083H01M4/8825Y02E60/50
Inventor 彭洪亮高伟马姣君刘思焱杨会田黄鹏儒林向成徐芬孙立贤
Owner GUILIN UNIV OF ELECTRONIC TECH
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