FeSe-based amorphous film catalyst and preparation method and application thereof

An amorphous thin film and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high instability of iron-based thin films, poor control of components, etc., to achieve The effect of uniform distribution of film components, good oxygen evolution catalytic performance, high relaxation and diffusion capacity

Active Publication Date: 2019-01-04
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Fe-Co-Se alloy catalysts are mostly electrochemically deposited FeCo and Se nanosphere mosaic structures, but the composition cannot be well controlled, and the iron-based thin film has high instability in the catalytic medium, so the structure The mining of denser and highly catalytic amorphous thin films has great application prospects

Method used

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  • FeSe-based amorphous film catalyst and preparation method and application thereof
  • FeSe-based amorphous film catalyst and preparation method and application thereof
  • FeSe-based amorphous film catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Fe in this example 40 co 40 Se 20 The structural formula of the amorphous thin film catalyst according to the atomic percentage of each element is: Fe 40 co 40 Se 20 , the preparation steps are as follows:

[0021] Step 1. According to Fe 40 co 40 Se 20 The atomic ratio required by the general formula of the alloy composition is to use Fe powder, Co powder and Se powder as raw materials (the purity of each raw material is ≥99.9wt.%) to make an alloy target (ordered at Beijing Zhongnuo New Materials).

[0022] Step 2. After cleaning and drying the alloy target material obtained in step 1 with absolute ethanol, place it on the target head in the chamber of the vacuum magnetron sputtering coating machine.

[0023] In order to meet the requirements of different tests for substrates, three substrates, carbon paper, glass sheet and silver foil, were taken, cleaned with acetone and absolute ethanol, and pasted on the substrate of a vacuum magnetron sputtering coating m...

Embodiment 2

[0032] This embodiment prepares Fe in the same manner as in Example 1 40 co 40 Se 20 For amorphous thin film catalysts, the only difference is that the temperature in step 4 is 25°C.

[0033] After characterization, the sample obtained in this example is completely amorphous and has good oxygen evolution performance. In KOH solution, when the current reaches 10mA / cm 2 The required overpotential is 330mV, and the chemical composition remains unchanged.

Embodiment 3

[0035] This embodiment prepares Fe in the same manner as in Example 1 40 co 40 Se 20 For amorphous thin film catalysts, the only difference is that the temperature in step 4 is 200°C.

[0036] After characterization, the sample obtained in this example is a mixture of crystal and amorphous, with good oxygen evolution performance. In KOH solution, when the current reaches 10mA / cm 2The required overpotential is 297mV, but the chemical composition changes before and after the measurement, that is, the state of the catalyst is unstable.

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Abstract

The invention discloses a FeSe-based amorphous film catalyst and a preparation method and application thereof. A structural formula, by atom percent of each element, of the catalyst is FexCoySez, wherein x is larger than or equal to 20 and smaller than or equal to 50, y is larger than or equal to 20 and smaller than or equal to 50, z is larger than or equal to 5 and smaller than or equal to 35, the amount of x, y and z is 100, and y is smaller than or equal to the amount of x and z. The FeSe-based amorphous film catalyst is prepared according to a magnetron sputtering coating method and greatin oxygen evolution performance and can be used as an oxygen evolution catalyst.

Description

technical field [0001] The invention belongs to the field of amorphous alloys, and in particular relates to a FeSe-based amorphous thin film catalyst and its preparation method and application. Background technique [0002] Hydrogen and oxygen production by electrolysis of water is considered as a promising clean energy technology due to its abundant resources and low carbon emissions. Oxygen evolution reaction, as an important half-reaction of electrocatalytic hydrolysis reaction, is a research hotspot nowadays. In the early stage of electrocatalyst research for oxygen evolution reaction, people focused on noble metal materials such as Ir and Ru. Due to the high cost and scarcity of precious metal materials, their wide commercial application is limited. In order to avoid the high cost, the research of transition alloys and their borides, carbides, oxides, sulfides, phosphides and selenides in the electrocatalysis of oxygen evolution reaction has received extensive attenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/02C25B11/06C25B1/04B01J35/00
CPCC25B1/04C25B11/04B01J27/0573B01J35/33B01J35/00B01J35/30Y02E60/36
Inventor 张博卢书强练军陈文俊单文兵张发宝蒋伟
Owner HEFEI UNIV OF TECH
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