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Three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth

A metal palladium and nanosheet technology, applied in the field of nanoscience, can solve problems such as hindering the industrial production and application of three-dimensional metal palladium nanosheets, affecting the catalytic performance of metal palladium catalysts, complex reaction process, etc. low temperature effect

Active Publication Date: 2017-12-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The shortcoming that prior art exists: reaction time is long (usually > 1 hour), and reaction process is complicated, and yield is low; In addition, the product surface that prepares has the coating of surfactant, and the existence of surfactant has influenced metal palladium greatly. catalytic properties of the catalyst; in addition, previously reported synthesis of three-dimensional metal palladium nanosheets is usually carried out in organic solvents and requires additional heating
The existence of these shortcomings seriously hinders the industrial production and application of three-dimensional metallic palladium nanosheets.

Method used

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  • Three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth
  • Three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth
  • Three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth

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Effect test

Embodiment 1

[0041] Embodiment 1: thickness 2.7 nanometers

[0042] (1) 2 mg of sodium chloropalladate was dissolved in 5 mL of water to form a transparent solution;

[0043] (2) Add 0.5mg FeCl to step (1) 3 , stir evenly;

[0044] (3) Pass carbon monoxide (0.3L / min) into step (2), react for 3 minutes, centrifuge, and wash to obtain three-dimensional metallic palladium nanosheets.

Embodiment 2

[0045] Embodiment 2: thickness 2.9 nanometers

[0046] (1) 10 mg of sodium chloropalladate was dissolved in 25 mL of water to form a transparent solution;

[0047] (2) Add 2.5mg FeCl to step (1) 3 , stir evenly;

[0048] (3) Pass carbon monoxide (0.3L / min) into step (2), react for 3 minutes, centrifuge, and wash to obtain three-dimensional metallic palladium nanosheets.

Embodiment 3

[0049] Embodiment 3: thickness 2.9 nanometers

[0050] (1) 50 mg of sodium chloropalladate was dissolved in 50 mL of water to form a transparent solution;

[0051] (2) Add 56mg FeCl to step (1) 3 , stir evenly;

[0052] (3) Pass carbon monoxide (0.3L / min) into step (2), react for 15 minutes, centrifuge, and wash to obtain three-dimensional metallic palladium nanosheets.

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Abstract

The invention discloses a three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth. The three-dimensional metal palladium nanosheet rapid preparation method based on etching auxiliary growth comprises the following steps that (1) a palladium precursor is dissolved in a solvent; (2) an oxidative etching agent is added into the product in the step (1) and mixed evenly; and (3) reducing gas or reagent is introduced into the product in the step (2) till precipitate separates out, and a three-dimensional deposition metal palladium nanosheet is obtained through centrifugation and washing. Based on the etching auxiliary growth, through the etching effect of the etching agent and the reduction and regrowth of the reducing agent, the three-dimensional deposition metal palladium nanosheet can be rapidly compounded, the compounding time is 3-60 minutes, the concentration of the compounded three-dimensional deposition metal palladium nanosheet is 0.1-100 mg / mL, and the thickness of an element of the palladium nanosheet is 1-5 nm. The three-dimensional metal palladium nanosheet material prepared according to the method shows the excellent activity in an electrocatalytic formic acid oxidation reaction.

Description

technical field [0001] The invention belongs to the field of nano science, in particular to a rapid preparation method of three-dimensional metallic palladium nanosheets. Background technique [0002] Palladium has excellent hydrogen storage properties. At room temperature, 1 volume of palladium sponge can absorb 900 volumes of hydrogen, and 1 volume of colloidal palladium can absorb 1200 volumes of hydrogen. When heated to 40-50°C, most of the absorbed hydrogen will be released, and it is widely used in gas reactions, especially as a catalyst for hydrogenation or dehydrogenation. It exhibits superior catalytic activity in sensing, electrocatalytic formic acid oxidation, carbon monoxide oxidation, and C-C coupling reactions. In addition, palladium is also an indispensable key material in high-tech fields such as aerospace and aviation, as well as automobile manufacturing. However, the reserves of palladium on the earth are scarce, and it is difficult to mine and smelt it. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0551B22F1/068B22F1/07B22F1/054
Inventor 金明尚刘亚明李祥
Owner XI AN JIAOTONG UNIV
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