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A kind of cobalt ditelluride electrocatalytic oxygen evolution composite material and its preparation method and application

A composite material, cobalt telluride technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of insufficient research on transition metal telluride, poor controllability, cumbersome steps, etc., to achieve broad application value, high performance, and process simple effect

Inactive Publication Date: 2019-02-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0005] The invention provides a cobalt ditelluride electrocatalytic oxygen evolution composite material and its synthesis method and application, which solves the problem of insufficient research on transition metal tellurides at present
[0006] Aiming at a series of problems in the current chemical synthesis method of transition metal tellurides, such as long period, cumbersome steps and poor controllability, the present invention provides a method using ZIF-67 as a template to synthesize and support it on a nitrogen-doped porous carbon framework in one step. Cobalt Telluride Nanoparticle Composite Materials

Method used

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  • A kind of cobalt ditelluride electrocatalytic oxygen evolution composite material and its preparation method and application
  • A kind of cobalt ditelluride electrocatalytic oxygen evolution composite material and its preparation method and application
  • A kind of cobalt ditelluride electrocatalytic oxygen evolution composite material and its preparation method and application

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Embodiment 1

[0037] Preparation of Nitrogen-Doped Cobalt Ditelluride Porous Carbon Frame Supported Nanoparticle Composite

[0038] (1) 1.62g (20mmol) of 2-methylimidazole was dissolved in 40ml of methanol to form solution A, 1.45g (5mmol) of cobalt nitrate hexahydrate was dissolved in 40ml of methanol to form solution B, and solution B was poured into solution A. Under stirring for 24h. Wash three times with absolute ethanol and deionized water, and dry under vacuum at 60°C for 12 hours;

[0039] (2) 0.2g ZIF-67 and 0.4g tellurium powder are respectively placed in two independent porcelain boats, which are placed in a tube furnace, in argon-hydrogen mixed gas (Ar 95%, H 2 5%) atmosphere at 2°C min -1 The heating rate is raised to 450-500° C., and kept at 450-500° C. for 4-8 hours to obtain a cobalt ditelluride nanoparticle composite material on a porous carbon framework doped with nitrogen.

[0040] Picture 1-1 It is the X-ray powder diffraction spectrum of the ZIF-67 precursor that em...

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Abstract

The invention provides a cobalt ditelluride electrocatalytic oxygen evolution composite material and its preparation method and application. The composite material is composed of cobalt ditelluride nanoparticles loaded on a nitrogen-doped graphite carbon framework, and its expression is CoTe 2 @N‑GC belongs to the field of new energy nanomaterial synthesis technology. Using the zeolite imidazolate framework material ZIF‑67 as a template and cobalt source, and simple tellurium as a tellurium source, the imidazole carbonization and tellurization process can be completed in one step by adjusting the reaction temperature and reaction time in an atmosphere of argon-hydrogen mixture , to obtain a cobalt ditelluride nanoparticle composite supported by a nitrogen-doped graphitic carbon framework. The synthesis method of the invention can solve the problems of cumbersome synthesis process, long period, poor uniformity and the like in the existing synthesis technology, as well as the research and development of abundant tellurides in transition metal chalcogenides. The material exhibits excellent electrocatalytic oxygen evolution performance and is suitable for the field of new energy development.

Description

technical field [0001] The invention belongs to the technical field of new energy nanomaterial synthesis and electrochemistry, and in particular relates to a cobalt ditelluride electrocatalyzed oxygen evolution composite material and its synthesis and application. Background technique [0002] With the gradual reduction of fossil energy and the increasing environmental problems caused by the combustion of fossil energy, green new energy technology has become an important direction of scientific and technological development. The electrochemical oxygen evolution reaction plays an important role in various energy conversion and storage technologies. For electrolytic water splitting, its reaction rate is mainly determined by the complex and kinetically slow oxygen evolution reaction. The slow kinetics process can be solved by using efficient electrochemical oxygen evolution reaction catalysts. However, current electrocatalysts for the oxygen evolution reaction still suffer fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/091Y02E60/36
Inventor 王兆杰刘明王淑涛鲁效庆张军周炎
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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