Transition metal embedded porous nitrogen-phosphorus-doped carbon material and preparation method and application thereof

A transition metal, embedded technology, used in carbon preparation/purification, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low doping efficiency and poor electrocatalytic performance of materials, and achieve high specific surface area, Good dispersion, the effect of accelerating the reaction process

Active Publication Date: 2017-06-09
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, at present, there are still some defects in the relevant research in the prior art, such as the lo...

Method used

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  • Transition metal embedded porous nitrogen-phosphorus-doped carbon material and preparation method and application thereof
  • Transition metal embedded porous nitrogen-phosphorus-doped carbon material and preparation method and application thereof
  • Transition metal embedded porous nitrogen-phosphorus-doped carbon material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) A certain amount of nickel nitrate hexahydrate and iron nitrate nonahydrate (two kinds of metal salts) must be dissolved in distilled water.

[0040] (2) Add EDTMPA solution to the metal salt solution to form a clear and transparent emerald green solution, and control the content of nitrogen and phosphorus at 5-80%.

[0041] (3) Put the agar powder in a beaker, add distilled water, the mass ratio of agar to distilled water (1-80): 100, and heat to 90°C to completely dissolve the agar.

[0042](4) Add the solution obtained in step (2) into the agar solution, stir, and cool naturally at room temperature to form a gel. Put it into the freezer for pre-freezing, and then put it into the freeze dryer to dry in vacuum to form a dry glue. Wherein the conditions of the freeze dryer are: the temperature of the freeze dryer is -55° C., and the air pressure is 80 Pa.

[0043] (5) Put the dry glue obtained in step (4) into a tube furnace, and perform high-temperature heat trea...

Embodiment 2

[0046] Same as Example 1, except that the metal salt used is nickel nitrate.

Embodiment 3

[0048] Same as Example 1, except that the metal salt used is potassium trioxalate ferrate.

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Abstract

The invention provides a transition metal embedded porous nitrogen-phosphorus-doped carbon material, employing agar as a carbon source, metal ions as a fixing agent, and EDTMPA (ethylene diamine tetramethylene phosphoric acid) as a nitrogen and phosphorus source; the porous nitrogen-phosphorus-doped carbon material prepared has co-existing microscopic and mesoscopic structures and metal particles evenly distributed in a carbon carrier. Compared with the prior art, the preparation method according to the invention is simple, the cost of raw materials is low, nitrogen and phosphorus doping efficiency can be improved effectively, the specific surface area of the catalyst nanoparticles can be enlarged effectively, and the prepared porous nitrogen-phosphorus-doped carbon material has high surface active area and high graphitizing degree, is capable of increasing current intensity when the catalyst engages in catalytic reaction, and has excellent electrocatalytic activity and fast dynamical progress.

Description

technical field [0001] The invention discloses a transition metal-embedded porous nitrogen-phosphorus-doped carbon material and a preparation method and application thereof, belonging to the technical field of doped carbon nanometer materials. Background technique [0002] With the increasing demand for energy, people's attention to renewable energy is gradually increasing. As a renewable clean energy with high energy density, hydrogen is expected to replace fossil fuels as a new energy source. Considering the cost and purity of hydrogen production, the most effective way is photolysis of water. However, the production of hydrogen is determined by its key half-reaction, the oxygen evolution reaction (OER). OER is a process with extremely slow kinetics, which requires catalysts to accelerate the reaction and reduce the overpotential, so as to obtain higher energy conversion efficiency. In the past few decades, noble metal catalysts such as RuO 2 , IrO 2 They are consider...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M4/90C01B32/05
CPCB01J27/24B01J35/0033H01M4/9083Y02E60/50
Inventor 徐林吴嘉言邓思辉唐亚文孙冬梅
Owner NANJING NORMAL UNIVERSITY
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