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Preparation method of rare earth element modified platinum ruthenium nanoparticles

A rare earth element and nanoparticle technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, to achieve uniform particle size distribution, excellent HOR performance and stability, and simple and convenient synthesis methods.

Pending Publication Date: 2022-06-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, formidable hurdles still need to be overcome to construct alloy nanomaterials with precise near-surface composition and smaller particle size

Method used

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  • Preparation method of rare earth element modified platinum ruthenium nanoparticles
  • Preparation method of rare earth element modified platinum ruthenium nanoparticles
  • Preparation method of rare earth element modified platinum ruthenium nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method of a rare-earth-modified PtRu nanoparticle catalyst with high performance and high stability under the simultaneous action of double reducing agents under alkaline conditions.

[0044] The method includes:

[0045] (1) get 0.2ml 10mMl / L erbium nitrate solution, 1ml 100mMl / L ruthenium chloride solution, 1ml 100mMl / L chloroplatinic acid solution, 0.5ml 10mg / ml sodium nitrate solution is mixed in 10ml DMF, stirs 30mMn at room temperature, The molar ratio of erbium ion, platinum ion and ruthenium ion in the mixed solution is 0.02:1:1;

[0046] (2) Add 26mg of sodium borohydride, stir 20mMn, then pass hydrogen into the quartz tube to make the pressure in the quartz tube 0.3MpM, make the reaction react at 150 ° C for 3 hours, cool to room temperature, wash with acetone for 3 times, and dry for 6 hours Obtain erbium-modified ruthenium platinum nanoparticles;

[0047] (3) Mixing the obtained catalyst and carbon black uniformly, after ultrasonication, dryi...

Embodiment 2

[0049] All the other are the same as in Example 1, except that erbium nitrate is changed into europium nitrate to obtain Pt 1 Ru 1 -EuO x / C.

Embodiment 3

[0051] All the other are the same as in Example 1, except that erbium nitrate is changed into cerium nitrate to obtain Pt 1 Ru 1 -CeO x / C.

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Abstract

The invention provides a preparation method of rare earth element modified platinum ruthenium nanoparticles, which comprises the following steps: (1) preparing a mixed solution of a rare earth metal salt, a ruthenium salt and a platinum salt, adding the mixed solution into DMF (Dimethyl Formamide), and fully and uniformly stirring, (2) then introducing hydrogen, reacting at 120-160 DEG C, and then standing and cooling to room temperature to obtain the rare earth element modified platinum ruthenium nanoparticles. Centrifuging, washing and drying reactants to obtain rare earth oxide modified ruthenium platinum nanoparticles; and (3) uniformly mixing the obtained catalyst and carbon black, carrying out uniform ultrasonic treatment, drying, and carrying out heat treatment to obtain PtRu-REE / C which is used for electrochemical performance testing. Wherein the HOR performance of the Pt1Ru1-Er2O3 / C and the Pt1Ru1-EuOx / C nanoparticles under the alkaline condition is superior to that of commercial Pt / C. The method is simple, short in experimental process and mild in condition; a trace amount of rare earth is introduced into a platinum-ruthenium system, fine combination of characteristic structures is generated in combination with a solvothermal synthesis technology, and the obtained rare earth oxide modified ruthenium-platinum nanoparticles show excellent and remarkable HOR performance and are very suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method and application of platinum-ruthenium nanoparticles modified by rare earth elements, and belongs to the technical field of inorganic material preparation. Background technique [0002] From the perspective of structure-function relationship, electrocatalysts with special surface structures or electronic effects, etc., can significantly affect intermediates and trace impurities (such as H, OH, and CO), thereby changing their HOR performance. E.g, et al studied the HOR of low-index Pt surfaces in alkaline media and found a correlation between activity and crystal face: ≈(111)-(100)<<(110). ZhuMng et al. confirmed that in alkaline media, PtRu / C nanocatalysts indeed have higher HOR activity than Pt / C, and the activation energies of PtRu / C and Pt / C obtained from the AMMhenMus formula are 14.6MJ mMl, respectively -1 and 35.2MJ mMl -1 . [0003] Despite the great advantages of Pt-RE alloy catalysts, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B82Y30/00B82Y40/00
CPCH01M4/921H01M4/926B82Y30/00B82Y40/00
Inventor 梁鑫张廷芝
Owner BEIJING UNIV OF CHEM TECH
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