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Nickel phosphide, preparation method thereof and method for producing hydrogen through water electrolysis

A technology of phosphide and electrolysis of water, which is applied in chemical instruments and methods, catalyst activation/preparation, electrolysis process, etc. It can solve the problems of difficult control of the reaction process, inability to adapt to production needs, harsh reaction conditions, etc., and achieve good electrolysis of water for hydrogen evolution Performance, low hydrogen evolution potential of electrolyzed water, and mild conditions

Active Publication Date: 2018-10-02
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned preparation methods need to be carried out under high temperature and high pressure conditions, the reaction conditions are harsh, the operation is complicated, the equipment requirements are high, the cost is high, and the reaction raw materials are mostly red phosphorus or highly toxic pH 3 As a phosphorus source, the reaction process is difficult to control, accompanied by by-products. Due to the above-mentioned defects, these preparation methods cannot meet the current production needs. Problems to be solved in the field

Method used

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  • Nickel phosphide, preparation method thereof and method for producing hydrogen through water electrolysis
  • Nickel phosphide, preparation method thereof and method for producing hydrogen through water electrolysis
  • Nickel phosphide, preparation method thereof and method for producing hydrogen through water electrolysis

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preparation example Construction

[0028] The invention provides a kind of preparation method of nickel phosphide, comprising the following steps:

[0029] a) dissolving the nickel source compound, phosphorus source compound and acetate in water to obtain a solution;

[0030] b) performing electrodeposition treatment on the solution to obtain nickel phosphide.

[0031] In the preparation method provided by the invention, the nickel source compound, phosphorus source compound and acetate are dissolved in water to obtain a solution, and then the solution is subjected to electrodeposition treatment to obtain nickel phosphide. The preparation method provided by the invention is simple and easy, has mild conditions, low cost, safety and environmental protection, has no by-products, and is suitable for large-scale production.

[0032] According to the present invention, the nickel source compound, phosphorus source compound and acetate are dissolved in water to obtain a solution.

[0033] In the present invention, ...

Embodiment 1

[0049] 1.1 Sample preparation

[0050] Add nickel nitrate hexahydrate, sodium acetate and sodium hypophosphite in a molar ratio of 1:2:10 to the adaptive electrolytic cell (the cell volume is 100mL, and the total molar amount of all raw materials is 0.65mol), and add a conductivity of 18.5MΩ.cm 50 mL of deionized water was dissolved to obtain a solution. Using a three-electrode system (with a glassy carbon electrode as a working electrode, an Ag / AgCl electrode filled with saturated KCl as a reference electrode, and a platinum wire as a counter electrode), the resulting solution was subjected to linear cyclic voltammetry scanning electrodeposition treatment, and the electrodeposition temperature was At 20°C, with a deposition potential of -0.2V to -1.0V, and a scan rate of 5mV / s, nickel phosphide was obtained after treatment for 160 seconds.

[0051] 1.2 Sample Characterization

[0052] (1) Gained product is carried out scanning electron microscope test, the result is as foll...

Embodiment 2

[0061] 1.1 Hydrogen evolution effect test of electrolyzed water

[0062] The nickel phosphides prepared in Example 1 and Comparative Example 1 (the nickel phosphides in Example 1 and Comparative Example 1 take the same amount) were used as electrolytic water hydrogen evolution catalysts to carry out electrolytic water hydrogen evolution tests, and a clean glassy carbon electrode was used as a blank Control (denoted as Comparative Example 2). details as follows:

[0063] The glassy carbon electrode deposited with nickel phosphide in Example 1, the glassy carbon electrode compounded with nickel phosphide in Comparative Example 1, and the clean glassy carbon electrode in Comparative Example 2 were respectively used as working electrodes, and Ag / AgCl was used as a reference electrode. The saturated KCl solution with a concentration of 3mol / L is used as the reference electrode filling solution, and the linear cycle scanning test is performed under the same conditions (ie 0.1mol / L ...

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Abstract

The invention provides nickel phosphide, a preparation method thereof and a method for producing hydrogen through water electrolysis. The preparation method of the nickel phosphide comprises the following steps: firstly, dissolving a nickel source compound, a phosphorus source compound and acetate into water, so as to obtain a dissolving liquid; secondly, performing electrolytic deposition treatment on the dissolving liquid, so as to obtain the nickel phosphide. The preparation method is simple and practicable, mild in condition, does not need severe conditions of high temperature and high pressure, simple in equipment and operation, low in cost, safe and environmentally friendly, does not produce side products, and is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of inorganic material synthesis, in particular to a nickel phosphide, a preparation method thereof and a method for producing hydrogen by electrolyzing water. Background technique [0002] Transition metal phosphides are a general term for binary or multi-component compounds formed by transition metals and phosphorus, which have both metal and semiconductor properties, such as Ni 2 P, MoP, and WP belong to transition metal phosphides, which have metallic properties and are important catalytic materials. In transition metal phosphides, with the different metal elements, the chemical bonds in the formed phosphides are also different, resulting in the formation of three different types of compounds in transition metal phosphides, namely ionic compounds, metal compounds and covalent compounds. Type compounds, therefore, transition metal phosphides show special physical and chemical properties and crystal struct...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J35/00B01J37/34C25B11/06C25B1/04
CPCC25B1/04C25B11/04B01J27/1853B01J37/348B01J35/33Y02E60/36
Inventor 陆顺万红兵
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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