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Preparation method of iridium tin metal oxide

A technology of oxides and metals, which is applied in the field of preparation of oxygen evolution electrocatalyst iridium tin oxide, which achieves the effect of less environmental pollution and expanding the scope of application

Inactive Publication Date: 2014-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, for the preparation of oxygen evolution catalysts, especially for binary iridium-based metal oxides, how to effectively control the catalyst morphology, prepare catalysts with high oxygen evolution activity and stability, and low noble metal Ir loading is still an issue. A major challenge in the field of research

Method used

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  • Preparation method of iridium tin metal oxide
  • Preparation method of iridium tin metal oxide
  • Preparation method of iridium tin metal oxide

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Experimental program
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Effect test

Embodiment 1

[0025] The precursor salt of iridium IrCl 3 ·xH 2 O (Ir content 54%) was added to the triblock polymer In the aqueous solution of F127, make Ir:F127=100:1 (by mol, the same below), stir at a high speed in an oil bath at 60°C for 6 hours, and slowly add a solution of 1M NaBH4+F127 dropwise (the concentration of F127 and the dissolved metal salt Same), make NaBH4:Ir=10:1, stir for 12h, let stand at room temperature for 6h, and centrifuge the sample. The lower layer of powder was washed 4 times with anhydrous ethanol solution, and placed in a vacuum desiccator at 60°C for 24 hours. After careful grinding, it was transferred to a tube furnace and baked at 500 °C for 2 h with a heating rate of 2 °C min -1 . After natural cooling, the IrO 2 .

Embodiment 2

[0027] Adopt the same method of embodiment 1 to test, but the added IrCl 3 ·xH 2 O is changed to SnCl containing 3 to 5 crystal waters 4 with H 2 IrCl 6 , making Ir 0.6 sn 0.4 o 2 , denoted as F127-Ir 0.6 sn 0.4 o 2 (1).

Embodiment 3

[0029] The same method as in Example 2 was used to test, but the amount of F127 added was changed to Ir: F127=10:1 to obtain F127-Ir 0.6 sn 0.4 o 2 , denoted as F127-Ir 0.6 sn 0.4 o 2 (2).

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Abstract

The invention relates to a preparation method of an iridium tin metal oxide. The chemical formula of the iridium tin metal oxide is IrSn<1-x>O2, wherein the x is less than 1 and not less than 0. The iridium tin metal oxide is prepared under the assist of a triblock surfactant. The surfactant has functions of structure guidance, weak reduction property, stabilization, and the like, and can effectively control the synthesis of the IrSn<1-x>O2. The method is a simple preparation method of the metal oxide with controllable morphology. The method is also used for preparation of binary metal oxides, thus expanding the application scope of the method. The IrSn<1-x>O2 prepared by the method when being used as a water electrolytic tank anode catalyst for solid polymer electrolyte (SPE) has good oxygen evolution electrocatalytic activity and stability. The method has application value wide in regenerative fuel cells (RFC), photoelectrocatalysis and electrolytic hydrogen generators.

Description

technical field [0001] The invention relates to the preparation of an oxygen evolution electrocatalyst iridium tin oxide, specifically, it is prepared with the assistance of a three-block surfactant with the "three-in-one" function of a template agent, a stabilizer and a weak reducing agent , can be applied to SPE water electrolysis, RFC, photoelectric catalysis, or oxygen evolution electrocatalyst in various electrolysis devices. Background technique [0002] Hydrogen is known as the most potential energy carrier in the 21st century. Using renewable energy, such as solar energy, wind energy, etc., hydrogen production by electrolysis of water is a more effective hydrogen production technology. Traditional low-temperature water electrolysis generators mainly include SPE water electrolysis cells and alkaline water electrolysis cells. In recent years, SPE water electrolysis technology has become a research hotspot in the field of hydrogen production due to its advantages of hi...

Claims

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Application Information

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IPC IPC(8): C01G55/00B01J23/62
Inventor 俞红梅李光福王浚英邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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