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Preparation method and application of palladium hydride nanosheet

A technology of nanosheets and palladium hydride, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc. Sheet structure and other issues to achieve the effect of optimizing electrocatalytic performance

Active Publication Date: 2019-11-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to literature reports, the entry of hydrogen atoms into the palladium lattice will reduce its adsorption capacity for CO gas molecules, weakening the confinement effect of CO on the palladium (111) surface, tending to form nanoparticles, and it is extremely difficult to form nanosheet structures. , the reports on palladium hydride in the literature are all nanoparticles

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  • Preparation method and application of palladium hydride nanosheet
  • Preparation method and application of palladium hydride nanosheet
  • Preparation method and application of palladium hydride nanosheet

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Embodiment 1

[0032] This embodiment prepares ultrathin palladium hydride nanosheet material, specifically comprises the following steps:

[0033] (1) Dissolve 50 mg of palladium acetylacetonate and 100 mg of molybdenum carbonyl in 10 mL of oleylamine, and stir at room temperature until the precursor salt is completely dissolved to form a uniform light yellow solution.

[0034] (2) Transfer the above solution into a 50 mL high-pressure resistant glass reaction vessel, and place it in an oil bath at 220° C. for 5 h.

[0035] (3) After the reaction is finished, centrifuge and wash with a mixed solution of cyclohexane and ethanol, repeat the operation 3 times, and dissolve the obtained product in 3 mL of cyclohexane for subsequent use.

[0036] figure 1 It is an electron micrograph of the ultrathin palladium hydride nanosheet prepared by the present invention. figure 1 a, figure 1 B is respectively the low-power and high-power transmission electron micrographs of the ultra-thin palladium hy...

Embodiment 2

[0043] This embodiment prepares ultrathin palladium hydride nanosheet material, specifically comprises the following steps:

[0044] (1) Weigh 0.5 mg of palladium acetylacetonate and 10 mg of molybdenum carbonyl dissolved in 2 mL of oleylamine, and stir at room temperature until the precursor salt is completely dissolved to form a uniform light yellow solution.

[0045] (2) Transfer the above solution into a 25 mL high-pressure resistant glass reaction vessel, and place it in an oil bath at 220° C. for 2 h.

[0046] (3) After the reaction is finished, centrifuge and wash with a mixed solution of cyclohexane and ethanol, repeat the operation 3 times, and dissolve the obtained product in 3 mL of cyclohexane for subsequent use.

[0047] After characterization, the product prepared according to the above steps is palladium hydride, and the thickness of the nanosheets is about 2.7nm. The electrocatalytic alcohol oxidation performance test was carried out according to the method of ...

Embodiment 3

[0049] (1) Weigh 8 mg of palladium acetylacetonate and 50 mg of molybdenum carbonyl, and dissolve different amounts of molybdenum acetylacetonate in 5 mL of oleylamine and stir at room temperature until the precursor salt is completely dissolved to form a uniform light yellow solution.

[0050] (2) Transfer the above solution into a 25mL high pressure resistant glass reactor, and place it in an oil bath at 220°C for 5h.

[0051] (3) After the above reaction is completed, centrifuge and wash with a mixed solution of cyclohexane and ethanol, repeat the operation 3 times, and dissolve the obtained product in 3 mL of cyclohexane for later use.

[0052] Figure 4 Among them, a, b.c.d are transmission electron micrographs of ultra-thin palladium hydride nanosheets with different doping amounts of molybdenum prepared by the present invention, respectively. The doping amounts of molybdenum are 5.8 at%, 8.29 at%, 9.62 at%, and 13.3 at%. And marked as Mo-PdH-1, Mo-PdH-2, Mo-PdH-3, Mo-P...

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Abstract

The invention discloses a preparation method of ultrathin and chemical components-adjustable palladium hydride nanosheet, and an application of the palladium hydride nanosheet in electrocatalytic alcohol oxidation. The material is successfully prepared by a one-step solvothermal process, and a palladium precursor salt, molybdenum carbonyl and other element precursor salts are added to a solvent oleylamine to obtain the ultrathin and chemical components-adjustable nanosheet structure with a uniform particle size. Studies of the electrocatalytic alcohol oxidation performance of the palladium hydride nanosheet show the palladium hydride nanosheet has an excellent electrocatalytic alcohol oxidation performance.

Description

technical field [0001] The invention belongs to the field of preparation and application of clean and sustainable new energy sources, and in particular relates to a preparation method and application of an ultrathin palladium hydride nanosheet material with adjustable chemical composition. Background technique [0002] Due to their unique structure and electronic properties, non-layered two-dimensional materials have shown excellent performance in the field of catalysis, which has attracted extensive attention of researchers. However, such materials require fine regulation and very complicated steps in the synthesis process, thus limiting the vigorous development of this family. Compared with layered two-dimensional materials, this type of material has abundant surface dangling bonds, and the surface dangling bonds are also an active site in a sense, which contributes to the improvement of catalytic performance. In order to reduce the surface energy, metal atoms tend to for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/12B01J31/28B01J31/34C25B11/06
CPCB01J31/121B01J31/28B01J31/34C25B11/091B01J35/23B01J35/33
Inventor 崔小强武建栋张海燕
Owner JILIN UNIV
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