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Method for preparing Pd catalyst with three-dimensional nano meshy structure by reduction of nitrile rubber precursor

A three-dimensional nano, network structure technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. , Pd metal catalyst instability and other problems, to achieve the effect of simple preparation method, high stability, excellent electrocatalytic activity and stability

Inactive Publication Date: 2012-03-28
JIANGSU DAOBO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the average particle size of the Pd catalyst particles prepared by the conventional liquid phase reduction method is relatively large, and the Pd metal catalyst is very unstable and easily deactivated by oxidation. Catalyst Utilization

Method used

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  • Method for preparing Pd catalyst with three-dimensional nano meshy structure by reduction of nitrile rubber precursor
  • Method for preparing Pd catalyst with three-dimensional nano meshy structure by reduction of nitrile rubber precursor
  • Method for preparing Pd catalyst with three-dimensional nano meshy structure by reduction of nitrile rubber precursor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for preparing the Pd catalyst with a three-dimensional nano-network structure by reducing the precursor of cyanide rubber comprises the following steps:

[0027] 1) Pipette 2.0 ml 0.05 mol / L K 2 PdCl 4 solution and 1.0 ml 0.05 mol / L K 3 Co(CN) 6 solution, ultrasonically mixed, and left to stand for half an hour to obtain a cyano rubber precursor.

[0028] 2) At room temperature (25°C), slowly add excess reducing agent solution (NaBH 4 ), let it stand for 24 hours, so that the cyano rubber precursor and the reducing agent react completely.

[0029] 3) After HClO 4 After washing with water several times, check with silver nitrate solution until there is no chloride ion in the eluate. Pd-NNWs were obtained after drying in a vacuum desiccator.

Embodiment 2

[0031] The method for preparing the Pd catalyst with a three-dimensional nano-network structure by reducing the precursor of cyanide rubber comprises the following steps:

[0032] 1) Pipette 2.0 ml 0.05 mol / L K 2 PdCl 4 solution and 1.0 ml 0.05 mol / L K 3 Co(CN) 6 solution, ultrasonically mixed, and left to stand for half an hour to obtain a cyano rubber precursor.

[0033] 2) At room temperature (25°C), slowly add excess reducing agent solution (NaH 2 PO 2 ), let it stand for 24 hours, so that the cyano rubber precursor and the reducing agent react completely.

[0034] 3) After HClO 4 After washing with water several times, check with silver nitrate solution until there is no chloride ion in the eluate. Pd-NNWs were obtained after drying in a vacuum desiccator.

Embodiment 3

[0036] The method for preparing the Pd catalyst with a three-dimensional nano-network structure by reducing the precursor of cyanide rubber comprises the following steps:

[0037] 1) Pipette 2.0 ml 0.05 mol / L K 2 PdCl 4 solution and 1.0 ml 0.05 mol / L K 3 Co(CN) 6 solution, ultrasonically mixed, and left to stand for half an hour to obtain a cyano rubber precursor.

[0038] 2) At room temperature (25°C), slowly add excess reducing agent solution (HCOOH) and let it stand for 24 hours to completely react the cyano rubber precursor with the reducing agent.

[0039] 3) After HClO 4 After washing with water several times, check with silver nitrate solution until there is no chloride ion in the eluate. Pd-NNWs were obtained after drying in a vacuum desiccator.

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Abstract

The invention discloses a method for preparing a Pd catalyst with three-dimensional nano meshy structure by reduction of a nitrile rubber precursor, which comprises: mixing K3Co(CN)6 and K2PdC14 by ultrasonic according to a molar ratio of 1:2 in a temperature range of 0 to 100 DEG C, standing and obtaining nitrile rubber A, adding reducer in the same amount or an excessive amount into the nitrile rubber A, standing for 0.1 to 24 hours, reacting nitrile rubber with the reducer, obtaining a component B after reducing the Pd metal , washing the component B, and drying the component B to obtain a palladium catalyst. The catalyst prepared by the method has a three-dimensional meshy structure, has high homogeneity and dispensability, and has high electric catalytic activity and stability for formic acid oxidization. The preparation method disclosed by the invention is simple and economic and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a method for preparing a direct formic acid fuel cell catalyst, in particular to a method for preparing a palladium catalyst (Pd-NNWs) with a three-dimensional nano-network structure by reducing a cyanide precursor. Oxidation has excellent catalytic performance and stability. Background technique [0002] Energy is closely related to the survival and development of human beings. With the depletion of fossil energy such as coal, oil, and natural gas, human beings are facing an energy crisis, and the use of fossil energy also causes serious environmental pollution. The inevitable choice for sustainable development. Due to the advantages of high energy conversion efficiency and low environmental pollution, fuel cells will become the best "clean energy" in the future. [0003] At present, fuel cells are favored by people for their high efficiency and convenience. It is a green energy device that directly converts chemical energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J35/02H01M4/90
CPCY02E60/50
Inventor 陈煜张露唐亚文周益明陆天虹
Owner JIANGSU DAOBO CHEM
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