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CoTe2 electro-catalysis oxygen evolution composite material and preparation method and application thereof

A composite material, cobalt telluride technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of insufficient research on transition metal tellurides, poor controllability, cumbersome steps, etc., to broaden the application value, high performance, and technology. simple effect

Inactive Publication Date: 2017-12-08
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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  • CoTe2 electro-catalysis oxygen evolution composite material and preparation method and application thereof
  • CoTe2 electro-catalysis oxygen evolution composite material and preparation method and application thereof

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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 CoTe2 electro-catalysis oxygen evolution composite material and a preparation method and application thereof, and belongs to the technical field of new energy nanomaterial synthesis. The CoTe2 electro-catalysis oxygen evolution composite material is formed in a manner that CoTe2 nano particles are loaded to an N-doped graphite carbon frame through recombination, the expression of the CoTe2 electro-catalysis oxygen evolution composite material is CoTe2@n-GC. A zeolite imidazate skeleton structure material ZIF-67 serves as a template and also serves as a cobalt source, elemental tellurium serves as a tellurium source, the reaction temperature and the reaction time are adjusted in an atmosphere of argon and hydrogen mixed gas, and accordingly imidazole carbonizing and tellurid processes are completed through a one-step manner, and the CoTe2 nano particle composite material with the N-doped graphite carbon frame as a support is obtained. By means of the synthetic method, the problems that according to an existing synthetic technology, the process is tedious, the period is relatively long and homogeneity is poor and other problems can be solved, and the study and development of telluride in transition metal chalcogenide are enriched. The CoTe2 electro-catalysis oxygen evolution composite material shows excellent electro-catalysis 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 Applications(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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