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Iron phosphide film hydrogen evolution catalyst and preparation method thereof

A technology of iron phosphide and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve problems such as poor stability, low performance of electrocatalytic hydrogen evolution, and high price. Achieve significant technological progress, efficient cycle stability, safe and environmentally friendly preparation of raw materials

Inactive Publication Date: 2018-05-08
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides an iron phosphide thin film hydrogen evolution catalyst and a preparation method thereof. The iron phosphide thin film hydrogen evolution catalyst and its preparation method should solve the problem of catalysts in the prior art Electrocatalytic hydrogen evolution performance is not high, the price is too expensive, and the technical problems of poor stability

Method used

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  • Iron phosphide film hydrogen evolution catalyst and preparation method thereof
  • Iron phosphide film hydrogen evolution catalyst and preparation method thereof
  • Iron phosphide film hydrogen evolution catalyst and preparation method thereof

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Embodiment 1

[0021] Embodiment 1: the preparation method of the iron phosphide thin film hydrogen evolution catalyst involved in the present embodiment comprises the following two steps:

[0022] Step 1): synthesis of iron oxyhydroxide film by hot solvent method. Weigh 3.2g hydrated ferrous sulfate crystals (FeSO 4 ·7H 2 O) join in the mixed solution of 160ml glycerol and water (the volume ratio of glycerol and water is 1:3), stir evenly, then transfer in the 200mL reactor, the reactor is warmed up to 120 ℃, reacts 24h. The resulting product was washed several times with deionized water and ethanol, respectively. Dry at room temperature. A film-like iron oxyhydroxide precursor was obtained.

[0023] Step 2): performing temperature-controlled phosphating on the iron oxyhydroxide film to form an iron phosphide film. A certain amount of the above-mentioned iron oxyhydroxide film is placed in the downstream of the adaptation reaction tube, and a certain amount of sodium dihydrogen phospha...

Embodiment 2

[0024] Example 2: Referring to the operation of step 2) in Example 1, the phosphating conditions were changed to 450 °C at a rate of 2 °C / min in a 20 mL / min Ar flow and maintained for 1 h, and then cooled to room temperature to obtain high crystallization Iron phosphide thin film catalyst, denoted as FeP-450℃.

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Abstract

The invention provides a preparation method of an iron phosphide film hydrogen evolution catalyst and belongs to the field of catalysis. The preparation method comprises a step of preparing an iron oxyhydroxide precursor, namely weighing an iron salt, dissolving the iron salt into a glycerin / water mixed solution, then, mixing the iron salt with the glycerin / water mixed solution, transferring the mixture into a reactor, raising the temperature to 100-140 DEG C to carry out a reaction, cleaning the product by using water and ethanol, and drying the product to obtain a film-like iron oxyhydroxideprecursor. The preparation method further comprises a step of preparing an iron phosphide film, namely placing the film-like iron oxyhydroxide precursor at the downstream of a tube furnace, placing sodium dihydrogen phosphate at the upstream of the tube furnace, and carrying out temperature-controlled phosphorization in an inert atmosphere to obtain an iron phosphide film catalyst. The preparation method has the characteristics of controllable synthesis of the film-like iron oxyhydroxide precursor and low-temperature controllable shape-preserving phosphorization and has the advantages such assafe and environment-friendly preparation raw materials, low price, simple preparation process and easiness in operation. The catalyst shows efficient hydrogen evolution activity and circulation stability in acidic, alkaline and neutral water solutions.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a catalyst, in particular to an iron phosphide thin film hydrogen evolution catalyst and a preparation method thereof. Background technique [0002] The global energy crisis, climate warming, and environmental pollution are becoming more and more severe, and it is urgent to develop clean new and renewable energy. As a green and environmentally friendly renewable energy, hydrogen energy has attracted widespread attention due to its many advantages such as cleanness, high efficiency, wide range of sources, and high combustion calorific value. Hydrogen production by electrolysis of water is considered to be one of the most potential hydrogen production technologies due to its advantages of simple operation, low cost and no pollution. However, in the process of hydrogen production by electrolysis of water, the overpotential of the hydrogen evolution reaction (HER) at the cathode is too...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J35/06B01J37/10B01J37/28
CPCB01J27/1853B01J37/10B01J37/28B01J35/33B01J35/59
Inventor 严雅夏宝玉赵斌
Owner UNIV OF SHANGHAI FOR SCI & TECH
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