A preparation method of n,p-codoped three-dimensional co nanoflowers and the resulting materials and applications

Abstract

The invention discloses a preparation method of N, P-co-doped three-dimensional Co nanoflowers, the resulting material and the application of the material as an anode catalyst for electrolyzing water and oxygen precipitation. The method uses alkali metal inorganic salts as templates and inorganic cobalt. The salt is used as the cobalt source and hypophosphite is used as the phosphorus source, and the N, P-co-doped three-dimensional Co nanoflower catalyst obtained by reduction is obtained. The N,P-co-doped three-dimensional Co nanoflowers prepared by the method of the present invention have the advantages of regular morphology, large surface area, and high electrocatalytic activity. They show high catalytic activity and stability as an oxygen evolution anode catalyst. The preparation method of the invention is simple, efficient and universally applicable.

Description

technical field

[0001] The invention relates to a preparation method of N, P-co-doped three-dimensional Co nanoflowers and the obtained material and application thereof, belonging to the technical field of electrolytic water catalysts. Background technique

[0002] Facing the problems of energy shortage and environmental pollution, a large number of scientific researchers are devoted to the development and development of clean energy technology. Compared with traditional fossil fuels, hydrogen energy has the advantages of no pollution, zero emissions, high efficiency, and wide application, and is expected to become the most promising clean energy in the future. At present, hydrogen is mainly separated from fossil fuels such as natural gas and coalbed methane. Not only is the industrial cost high, but it is also difficult to obtain high-purity hydrogen, which greatly limits the large-scale application of hydrogen energy. In recent years, the technology of producing high-puri...

Examples

Embodiment 1

[0032] A preparation method of N, P-co-doped three-dimensional Co nanoflowers, comprising the following steps:

[0033] 1) Recrystallization of precursor and alkali metal inorganic salt saturated solution: Measure 10mL saturated NaCl solution, add 10mL0.05mol L -1 CoCl 2 Precursor solution and 5mL 0.05mol L -1 NaH 2 PO 2 Solution, oscillate to mix evenly, disperse into a watch glass and recrystallize at room temperature.

[0034] 2) Preparation of N,P-co-doped three-dimensional Co nanoflowers: the recrystallized product obtained in step 1) was heated in an ammonia atmosphere at 5°C min -1 The temperature was raised to 600° C. for heat treatment, and kept at this temperature for 3 hours. After cooling to room temperature, the final product was obtained by centrifuging and washing with water for several times.

Embodiment 2

[0036] A preparation method of N, P-co-doped three-dimensional Co nanoflowers, comprising the following steps:

[0037] 1) Recrystallization of precursor and alkali metal inorganic salt saturated solution: measure 10mL saturated Na 2 SO 4 solution, add 10mL0.05mol L -1 CoCl 2 Precursor solution and 5mL 0.05mol L -1 NaH 2 PO 2 Solution, oscillate to mix evenly, disperse into a watch glass and recrystallize at room temperature.

[0038] 2) Preparation of N,P-co-doped three-dimensional Co nanoflowers: the recrystallized product obtained in step 1) was heated in an ammonia atmosphere at 5°C min -1 The temperature was raised to 600° C. for heat treatment, and kept at this temperature for 3 hours. After cooling to room temperature, the final product was obtained by centrifuging and washing with water for several times.

Embodiment 3

[0040] A preparation method of N, P-co-doped three-dimensional Co nanoflowers, comprising the following steps:

[0041] 1) Recrystallization of precursor and alkali metal inorganic salt saturated solution: measure 10mL saturated MgCl 2 solution, add 10mL0.05mol L -1 CoCl 2 Precursor solution and 5mL 0.05mol L -1 NaH 2 PO 2 Solution, oscillate to mix evenly, disperse into a watch glass and recrystallize at room temperature.

[0042] 2) Preparation of N,P-co-doped three-dimensional Co nanoflowers: the recrystallized product obtained in step 1) was heated in an ammonia atmosphere at 5°C min -1 The temperature was raised to 600° C. for heat treatment, and kept at this temperature for 3 hours. After cooling to room temperature, the final product was obtained by centrifuging and washing with water for several times.

technical field

[0001] The invention relates to a preparation method of N, P-co-doped three-dimensional Co nanoflowers and the obtained material and application thereof, belonging to the technical field of electrolytic water catalysts. Background technique

[0002] Facing the problems of energy shortage and environmental pollution, a large number of scientific researchers are devoted to the development and development of clean energy technology. Compared with traditional fossil fuels, hydrogen energy has the advantages of no pollution, zero emissions, high efficiency, and wide application, and is expected to become the most promising clean energy in the future. At present, hydrogen is mainly separated from fossil fuels such as natural gas and coalbed methane. Not only is the industrial cost high, but it is also difficult to obtain high-purity hydrogen, which greatly limits the large-scale application of hydrogen energy. In recent years, the technology of producing high-puri...

Examples

Embodiment 1

[0032] A preparation method of N, P-co-doped three-dimensional Co nanoflowers, comprising the following steps:

[0033] 1) Recrystallization of precursor and alkali metal inorganic salt saturated solution: Measure 10mL saturated NaCl solution, add 10mL0.05mol L -1 CoCl 2 Precursor solution and 5mL 0.05mol L -1 NaH 2 PO 2 Solution, oscillate to mix evenly, disperse into a watch glass and recrystallize at room temperature.

[0034] 2) Preparation of N,P-co-doped three-dimensional Co nanoflowers: the recrystallized product obtained in step 1) was heated in an ammonia atmosphere at 5°C min -1 The temperature was raised to 600° C. for heat treatment, and kept at this temperature for 3 hours. After cooling to room temperature, the final product was obtained by centrifuging and washing with water for several times.

Embodiment 2

[0036] A preparation method of N, P-co-doped three-dimensional Co nanoflowers, comprising the following steps:

[0037] 1) Recrystallization of precursor and alkali metal inorganic salt saturated solution: measure 10mL saturated Na 2 SO 4 solution, add 10mL0.05mol L -1 CoCl 2 Precursor solution and 5mL 0.05mol L -1 NaH 2 PO 2 Solution, oscillate to mix evenly, disperse into a watch glass and recrystallize at room temperature.

[0038] 2) Preparation of N,P-co-doped three-dimensional Co nanoflowers: the recrystallized product obtained in step 1) was heated in an ammonia atmosphere at 5°C min -1 The temperature was raised to 600° C. for heat treatment, and kept at this temperature for 3 hours. After cooling to room temperature, the final product was obtained by centrifuging and washing with water for several times.

Embodiment 3

[0040] A preparation method of N, P-co-doped three-dimensional Co nanoflowers, comprising the following steps:

[0041] 1) Recrystallization of precursor and alkali metal inorganic salt saturated solution: measure 10mL saturated MgCl 2 solution, add 10mL0.05mol L -1 CoCl 2 Precursor solution and 5mL 0.05mol L -1 NaH 2 PO 2 Solution, oscillate to mix evenly, disperse into a watch glass and recrystallize at room temperature.

[0042] 2) Preparation of N,P-co-doped three-dimensional Co nanoflowers: the recrystallized product obtained in step 1) was heated in an ammonia atmosphere at 5°C min -1 The temperature was raised to 600° C. for heat treatment, and kept at this temperature for 3 hours. After cooling to room temperature, the final product was obtained by centrifuging and washing with water for several times.

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