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Preparation method of nitrogen-doped porous carbon loaded cobalt phosphide/nickel phosphide

A technology of porous carbon and nitrogen doping, applied in the field of materials science, can solve the problems of restricting the introduction of inorganic metal elements, poor solubility of inorganic metal salts, etc., and achieve the effect of less pollution in the synthesis process and uniform distribution of samples

Active Publication Date: 2021-08-17
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Conventional organic polymer systems have poor solubility to inorganic metal salts, which restricts the introduction of inorganic metal elements

Method used

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  • Preparation method of nitrogen-doped porous carbon loaded cobalt phosphide/nickel phosphide
  • Preparation method of nitrogen-doped porous carbon loaded cobalt phosphide/nickel phosphide
  • Preparation method of nitrogen-doped porous carbon loaded cobalt phosphide/nickel phosphide

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Embodiment 1

[0044] Embodiment 1 of the present invention discloses a preparation method of nitrogen-doped porous carbon-supported cobalt phosphide / nickel phosphide, and the adopted technical scheme is as follows:

[0045] S1, preparation of cobalt / nickel-containing melamine-formaldehyde resin: mix 4.0mmol melamine and 28mmol37% formaldehyde aqueous solution in a test tube, set the temperature at 60°C for 10min, shake it several times until it becomes a clear prepolymer liquid, and mix 2.0mmol of Co (NO 3 ) 2 ·6H 2 O and 2.0mmol of Ni(NO 3 ) 2 ·6H 2 The powder mixture of O was poured into the prepolymer liquid, shaken to dissolve, and kept at 60°C until a solid polymer was formed. Take it out after polymerization and solidification to obtain a composite of melamine formaldehyde resin (MF) combined with inorganic metal salt, which is Co / Ni-MF;

[0046] S2, preparation of nitrogen-doped porous carbon-supported cobalt-nickel materials: Co / Ni-MF on N 2 Calcined at a constant temperature...

Embodiment 2

[0050] Example 2 of the present invention discloses a method for preparing nitrogen-doped porous carbon-supported cobalt phosphide, and the adopted technical scheme is as follows:

[0051] With the technical scheme of embodiment 1, in step S1 " with the Co(NO of 2.0mmol 3 ) 2 ·6H 2 O and 2.0mmol of Ni(NO 3 ) 2 ·6H 2 Powder mixture of O" was replaced by: 4.0mmol of Co(NO 3 ) 2 ·6H 2 O, without adding nickel salt, other steps are the same as in Example 1, and this example finally obtains Co x P y -NPC materials. Such as figure 2 As shown, the analysis confirmed the presence of cobalt phosphide. Do the same for LSV scanning, such as Figure 4 As shown, its η 10 is 158mV.

Embodiment 3

[0053] Embodiment 3 of the present invention discloses a preparation method of nitrogen-doped porous carbon-supported nickel phosphide, and the adopted technical scheme is as follows:

[0054] With the technical scheme of embodiment 1, in step S1 " with the Co(NO of 2.0mmol 3 ) 2 ·6H 2 O and 2.0mmol of Ni(NO 3 ) 2 ·6H 2 Powder mixture of O" was replaced by: 5.0 mmol of Ni(NO 3 ) 2 ·6H 2 O, do not add cobalt salt, other steps are identical with embodiment 1, and present embodiment finally obtains Ni x P y -NPC materials. Such as image 3 As shown, the analysis confirmed the presence of nickel phosphide. Do the same for LSV scanning, such as Figure 4 As shown, its η 10 is 176mV.

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Abstract

The invention discloses a preparation method of nitrogen-doped porous carbon loaded cobalt phosphide / nickel phosphide, the preparation method comprises the following specific steps: S1, mixing melamine and a formaldehyde aqueous solution, oscillating to obtain a clear prepolymer solution, pouring a mixture of cobalt salt and nickel salt into the prepolymer solution, oscillating, dissolving, preserving heat, polymerizing and curing a polymer, and taking out to obtain Co / Ni-MF; s2, calcining and carbonizing the Co / Ni-MF in an inert atmosphere, and naturally cooling the Co / Ni-MF to room temperature in a protective gas atmosphere to obtain Co / Ni-NPC; and S3, carrying out phosphating reaction on Co / Ni-NPC, cooling, washing, and carrying out vacuum drying to obtain CoxPy / NixPy-NPC. The catalyst prepared by the method has the characteristics of uniform material, good catalytic activity and the like.

Description

technical field [0001] The invention relates to the technical field of material science, and more specifically relates to a preparation method of nitrogen-doped porous carbon supported cobalt phosphide / nickel phosphide. Background technique [0002] In the preparation process of supported catalysts, improving the dispersion uniformity of catalyst active components and realizing the convenient adjustment of catalyst support components are one of the key tasks of research. Carbon is a commonly used support component for supported catalysts. Conventional supported solid catalysts are mostly prepared by impregnation and mixing methods, which cannot effectively solve the problem of uniform mixing. Precipitation method is also used to prepare catalysts, and there are also determinations such as that the activated carbon carrier is easily distributed unevenly in the solution. The homogeneous reaction of gas phase and liquid phase can effectively solve the problem of material inho...

Claims

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Application Information

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IPC IPC(8): C25B11/031C25B11/04C25B1/04
CPCC25B11/04C25B1/04Y02E60/36
Inventor 孙伟朱林黄玉豪王宝丽闫丽君邵波张艳
Owner HAINAN NORMAL UNIV
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