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Self-supporting transition metal-phosphorus alloy catalyst, and preparation method and application thereof

A technology of alloy catalysts and transition metals, applied in the field of self-supporting transition metal-phosphorus alloy catalysts and their preparation, can solve the problems of low catalytic activity and limited pH value

Inactive Publication Date: 2015-12-02
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a self-supporting transition metal-phosphorous alloy catalyst and its preparation method and application in order to solve the technical problem of low catalytic activity of existing catalysts or limited by pH value

Method used

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  • Self-supporting transition metal-phosphorus alloy catalyst, and preparation method and application thereof
  • Self-supporting transition metal-phosphorus alloy catalyst, and preparation method and application thereof
  • Self-supporting transition metal-phosphorus alloy catalyst, and preparation method and application thereof

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preparation example Construction

[0022] The present invention also provides a preparation method of a self-supporting transition metal-phosphorous alloy catalyst, the method comprising:

[0023] Step 1: mixing metal salts of transition metal elements and phosphorus sources, and then adding surfactants or alkaline solutions to obtain electrolytes;

[0024] Step 2: Using the transition metal conductive substrate as a working electrode, performing electrodeposition in the electrolyte solution obtained in Step 1 to obtain a self-supporting transition metal-phosphorus alloy catalyst.

[0025] According to the present invention, the metal salt of the transition metal element and the phosphorus source are mixed, and then a surfactant or an alkaline solution is added, preferably dissolved in distilled water under the condition of magnetic stirring, to obtain an electrolyte; preferably, the transition metal element can be Add the molybdenum source when the metal salt and the phosphorus source are mixed, and then add t...

Embodiment 1

[0032] Weigh 0.1 moles of nickel sulfate, 0.3 moles of sodium hypophosphite and 0.1 moles of sodium acetate and mix them to obtain an electrolyte; wash the nickel mesh with dilute hydrochloric acid, ethanol, and deionization, then add it to the above solution, and use the nickel mesh as a working electrode , Graphite sheet is the counter electrode, saturated calomel is the reference electrode, using electrochemical workstation (CHI660D) at 25 ℃ under the condition of 0.01 A / cm 2 The constant current was reacted for 0.1 hour, and nickel-phosphorus alloy particles were obtained on the nickel mesh.

[0033] figure 1 It is the scanning electron micrograph figure of the nickel-phosphorus alloy particle that embodiment 1 prepares, and wherein figure a is the scanning electron microscope photograph under the 50 micron scale, and figure b is the scanning electron microscope photograph under the 500 nanometer scale, and this figure shows the nickel mesh It is completely covered by nic...

Embodiment 2

[0035] Weigh 0.05 moles of nickel nitrate, 0.2 moles of sodium citrate, 0.2 moles of sodium hypophosphite and 0.5 moles of ammonium sulfate and mix to obtain an electrolyte; wash the copper grid with dilute hydrochloric acid, ethanol, and deionization, and then add it to the above mixed solution , with copper mesh as the working electrode, graphite sheet as the counter electrode, and saturated calomel as the reference electrode, use an electrochemical workstation (CHI660D) at 25 ° C to 0.01 A / cm 2 The constant current was reacted for 1 hour, and nickel-phosphorus alloy particles were obtained on the copper grid.

[0036] image 3The scanning electron micrograph figure of the nickel-phosphorus alloy particle that is prepared in embodiment 2, wherein figure a is the scanning electron microscope photograph under the 20 micron scale, and figure b is the scanning electron microscope photograph under the 500 nanometer scale, and this figure shows the copper network Fully covered by...

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Abstract

The invention provides a self-supporting transition metal-phosphorus alloy catalyst, and a preparation method and an application thereof, and belongs to the field of alkaline electrolytic bath water decomposition. The preparation method of the catalyst comprises the following steps: mixing the salt of a transition metal element with a phosphorus source, and adding a surfactant or an alkaline solution to obtain an electrolyte; and electrodepositing in the electrolyte with a transition metal conductive substrate as a working electrode in order to obtain the self-supporting transition metal-phosphorus alloy catalyst. The invention also provides the self-supporting transition metal-phosphorus alloy catalyst prepared through the preparation method. The self-supporting transition metal-phosphorus alloy catalyst has excellent electrocatalytic hydrogen evolution and oxygen evolution performances in electrolytic baths.

Description

technical field [0001] The invention relates to the field of water decomposition in an alkaline full electrolytic cell, in particular to a self-supporting transition metal-phosphorus alloy catalyst and its preparation method and application. Background technique [0002] In the 21st century, the increase in energy consumption and the rapid use of fossil fuels have made human beings face the serious problem of developing efficient and sustainable energy. Therefore, in order to realize the sustainable development of human society, it is imminent to develop clean and renewable energy. Hydrogen is a new energy source with high combustion value, high efficiency and cleanness that can replace traditional fossils. However, the current production of hydrogen energy is mainly obtained by reforming coal and natural gas, which will inevitably increase the consumption of non-renewable energy and bring about environmental pollution problems. Hydrogen production by electrolysis of water...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J27/19C25B1/04C25B11/06
CPCY02E60/36
Inventor 孙旭平邢志财
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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