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Composite electrode, preparation method thereof, application of composite electrode and electro-catalysis complete hydrolysis device

A composite electrode and electrocatalysis technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of restricting the efficiency of electrocatalysis in total water splitting, slow reaction kinetics, and difficulty in large-scale application, and achieve high electron transfer efficiency, Strong ability to promote the effect of anode oxygen evolution reaction

Active Publication Date: 2019-09-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the HER reaction, Pt group metals have low overpotential and high stability, but it is difficult to be applied on a large scale due to scarcity of resources and high cost
Compared with the HER reaction, the kinetics of the OER reaction involving four-electron transfer is slow, and the resulting high oxygen evolution overpotential is the main reason why the cell voltage is much higher than the theoretical water splitting voltage (1.23V), which seriously restricts the overall electrocatalytic process. Efficiency of splitting water

Method used

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  • Composite electrode, preparation method thereof, application of composite electrode and electro-catalysis complete hydrolysis device
  • Composite electrode, preparation method thereof, application of composite electrode and electro-catalysis complete hydrolysis device
  • Composite electrode, preparation method thereof, application of composite electrode and electro-catalysis complete hydrolysis device

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preparation example Construction

[0072] In another aspect of the present invention, the present invention provides a method for preparing the aforementioned composite electrode. The method includes:

[0073] S100: Form a first active material layer on at least part of the surface of the conductive substrate to obtain a composite layer.

[0074] It should be noted that the conductive matrix and the first active material layer are consistent with the previous description, and will not be repeated here.

[0075] In some embodiments of the present invention, the first active material layer is grown on the surface of the conductive substrate by first in-situ growth.

[0076] In some specific embodiments of the present invention, the first in-situ growth includes: coating the surface of the conductive substrate with a phosphorus source and then performing a firing treatment. Therefore, the operation is simple, convenient and easy to realize.

[0077] In some embodiments of the present invention, the temperature ...

Embodiment 1

[0110] The preparation method of the composite electrode is as follows:

[0111] 1. Prepare 1M hydrochloric acid solution and 1M sodium hydroxide solution respectively; under ultrasonic conditions, place the conductive substrate (foam nickel) in the above-mentioned acid solution, alkali solution, acetone and deionized water in sequence, and ultrasonicate for 10 minutes respectively . Subsequently, the phosphorus source was covered on the surface of the cleaned conductive substrate, placed in an atmosphere furnace and roasted at 500 ° C for 2 hours, and the obtained product was ultrasonically cleaned in deionized water and ethanol for 10 minutes, and then put into vacuum drying for 8 hours to obtain Composite layer (scanning electron microscope (SEM image) of the composite layer can refer to image 3 ).

[0112] 2. In a potassium hydroxide solution at 25°C, anodize the first active material layer with a graphite rod as the cathode and the composite layer as the anode. The ano...

Embodiment 2

[0115] The method for preparing the composite electrode in this example is the same as that in Example 1, except that in the obtained composite electrode, based on the total mass of the first active material layer and the second active material layer, the content of the second active material layer is 2 wt%.

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Abstract

The invention provides a composite electrode, a preparation method thereof, an application of the composite electrode and an electro-catalysis complete hydrolysis device, and relates to the technical field of complete hydrolysis. The composite electrode comprises a conductive substrate, a first active material layer and a second active material layer, the first active material layer is arranged at least part of surface of the conductive substrate to form a material containing a transition metal phosphide of the first active material layer, and the second active material layer is arranged at least part of surface of the first active material layer to form a material containing hydroxyl oxidation transition metal of the second active material layer. The composite electrode is low in cost, and electro-catalysis complete hydrolysis is efficiently and stably implemented by the aid of the composite electrode.

Description

technical field [0001] The invention relates to the technical field of total water splitting, in particular to a composite electrode, its preparation method and application, and an electrocatalytic total water splitting device. Background technique [0002] At present, the development of green, clean and renewable alternative energy is the key to alleviating the energy crisis and solving environmental problems. Among various alternative energy strategies, the establishment of an energy infrastructure using hydrogen as an energy carrier provides an ideal alternative energy method for mankind to fundamentally solve global problems such as energy and the environment. Electrolyzed water technology has a long history and is a relatively mature hydrogen production process. It has the advantages of simple principle, convenient operation, high product purity, clean and pollution-free, etc. However, the process of hydrogen production by electrolysis of water also has the defect of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/02C25B11/06C25B1/04C25D11/02
CPCC25B1/04C25B11/02C25D11/02C25B11/051C25B11/091Y02E60/36
Inventor 邹吉军潘轮张香文姚云朵
Owner TIANJIN UNIV
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