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Self-supporting AuPd alloy mesoporous nanosphere and preparation method and application thereof

A nano-sphere, self-supporting technology, applied in chemical instruments and methods, non-metallic elements, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effect of enhancing catalytic activity, not easy to dissolve, and convenient for recovery and recycling

Active Publication Date: 2020-05-08
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the storage and transportation of hydrogen is one of the biggest challenges

Method used

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  • Self-supporting AuPd alloy mesoporous nanosphere and preparation method and application thereof
  • Self-supporting AuPd alloy mesoporous nanosphere and preparation method and application thereof
  • Self-supporting AuPd alloy mesoporous nanosphere and preparation method and application thereof

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preparation example Construction

[0034] A method for preparing self-supporting AuPd alloy mesoporous nanospheres, comprising the following steps:

[0035] Step 1. Weigh a certain mass of polyionic liquid 1-butyl-3-methylimidazole polystyrene sulfonate and add it to water to prepare a reaction medium solution with a mass concentration of 0.0005-0.005 g / mL for later use;

[0036] Step 2, take 5 mL of the reaction medium solution in step 1 and add it to the reaction flask;

[0037] Step 3: Take 0.0005-0.005 mmol of HAuCl 4 Add into water to make HAuCl 4 solution, after which the prepared HAuCl 4 Solution is added in the reaction medium solution of step 2;

[0038] Step 4, take 0.0005-0.005 mmol of Na 2 PdCl 4 Added into water, prepared as Na 2 PdCl 4 solution, after which the prepared Na 2 PdCl 4 The solution is added to the mixed solution of step 3;

[0039] Step 5, taking vitamin C by weighing, adding it to distilled water, preparing a reducing agent vitamin C solution with a molar concentration of 0...

Embodiment 1

[0043] 1) Weigh 0.1 g of 1-butyl-3-methylimidazole polystyrene sulfonate, dilute to 100 mL, and prepare 1-butyl-3-methyl-imidazole with a mass concentration of 0.001 g / mL Polystyrene sulfonate polyionic liquid aqueous solution, which is the reaction medium solution, is for subsequent use;

[0044] 2) Take 5 mL of the reaction medium solution in step 1) into a round bottom flask;

[0045] 3) Add 0.001 mmol of HAuCl to the reaction medium solution in step 2) 4 solution;

[0046] 4) To the step 3) reaction solution, add the substance in an amount of 0.003 mmol of Na 2 PdCl 4 solution;

[0047] 5) Weigh vitamin C, add distilled water to prepare a vitamin C reducing agent aqueous solution with a molar concentration of 0.1 mol / L, and add 0.5 mL to the reaction solution in step 4);

[0048] Step 6) Gently shake the reaction bottle to mix the reaction solution evenly, and leave to react at room temperature for 2 h to prepare the reaction mixture;

[0049] 7) Centrifuge the react...

Embodiment 2

[0052] 1) Weigh 0.2 g of 1-butyl-3-methylimidazole polystyrene sulfonate, dilute to 100 mL, and prepare 1-butyl-3-methyl-imidazole with a mass concentration of 0.002 g / mL The aqueous solution of polystyrene sulfonate polyionic liquid is the reaction medium solution, which is ready for use;

[0053] 2) Take 5 mL of the reaction medium solution in step 1) into a round bottom flask;

[0054] 3) Add 0.001 mmol of HAuCl to the reaction medium solution in step 2) 4 aqueous solution;

[0055] 4) To the step 3) reaction solution, add the substance in an amount of 0.005 mmol of Na 2 PdCl 4 aqueous solution;

[0056] 5) Weigh vitamin C, add distilled water to prepare a vitamin C reducing agent aqueous solution with a molar concentration of 0.1 mol / L, and add 0.5 mL to the reaction solution in step 4);

[0057] Step 6) Gently shake the reaction bottle to mix the reaction solution evenly, and leave to react at room temperature for 2 h to prepare the reaction mixture;

[0058] 7) Cen...

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Abstract

The invention discloses a self-supporting AuPd alloy mesoporous nanosphere. The element composition ratio of Au to Pd in the AuPd alloy mesoporous nanosphere is 1: (1-5); the particle size of the AuPdalloy mesoporous nanosphere is 40-60 nm; and the AuPd alloy mesoporous nanosphere is formed by self-assembly of dendritic structures with particle sizes not larger than 10 nm, mesoporous channel structures with pore sizes in a range of 1.5-3.5 nm are evenly distributed on the surface of the AuPd alloy mesoporous nanosphere, and an average specific surface area is 40.51 m <2> / g. The self-supporting AuPd alloy mesoporous nanosphere which is uniform in morphology, stable in structure, large in specific surface area, excellent in catalytic performance on a formic acid dehydrogenation reaction andof a hierarchical structure is prepared through a one-step reaction method which is simple in steps, convenient to operate, safe and low in consumption, and the complex and diverse mesoporous channelstructures are uniformly distributed on the surface of the prepared self-supporting AuPd alloy mesoporous nanosphere.

Description

technical field [0001] The invention relates to the technical field of preparation of nanocatalysts, in particular to a preparation method of self-supporting AuPd alloy mesoporous nanospheres in polyionic liquid aqueous solution and research on its catalytic application. Background technique [0002] Ionic liquids are considered as a green solvent because of their excellent properties such as high chemical stability, low vapor pressure, good solubility, high nucleation rate, and adjustable structure. Based on the above-mentioned excellent properties, ionic liquids have been widely used in various fields in recent years. In the field of catalyst preparation, Chinese patent (CN107570210.A) uses ionic liquid 1-ethyl-3-methylimidazole acetate, 1-sulfonic acid butyl-3-vinylimidazolium bisulfate and 1-butyl - One or more of 3-methylimidazolium hexafluorophosphate to prepare ionic liquid-polymer supported Pd-M based catalyst. The patent (CN110252407.A) uses carboxyl-functionalize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J35/10B01J31/06B01J31/02B01J35/08C01B3/22
CPCB01J23/52B01J31/06B01J31/0281C01B3/22B01J35/51B01J35/61B01J35/643B01J35/613B01J35/647
Inventor 姚开胜王楠王键吉卢伟伟张军
Owner HENAN UNIV OF SCI & TECH
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