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Ferro-cobalt bimetallic phosphating nano-particles with nitrogen-doped carbon as substrate and preparation method and application of ferro-cobalt bimetallic phosphating nano-particles

A bimetallic nano, nitrogen-doped carbon technology, applied in the field of electrocatalytic materials, can solve the problems of low conductivity, complex parameters, complex preparation of multi-component phosphides, etc., achieving low cost, wide sources, good cycle stability and electrical The effect of catalytic performance

Active Publication Date: 2022-07-08
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lower conductivity limits its application. Nitrogen-doped carbon and phosphating materials can effectively improve the conductivity of materials, such as nickel-based phosphides, nickel-cobalt-based phosphides, and iron-doped nickel / cobalt-based phosphides, etc. , compared to mono- and binary metal phosphides, multi-metal phosphides with doped components can provide more abundant redox active sites and better conductivity
However, the preparation of multi-component phosphides is also more complicated, because there are more elements involved, and the parameters to be controlled are also more complicated.

Method used

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  • Ferro-cobalt bimetallic phosphating nano-particles with nitrogen-doped carbon as substrate and preparation method and application of ferro-cobalt bimetallic phosphating nano-particles
  • Ferro-cobalt bimetallic phosphating nano-particles with nitrogen-doped carbon as substrate and preparation method and application of ferro-cobalt bimetallic phosphating nano-particles
  • Ferro-cobalt bimetallic phosphating nano-particles with nitrogen-doped carbon as substrate and preparation method and application of ferro-cobalt bimetallic phosphating nano-particles

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Embodiment 1

[0026] This embodiment is as follows figure 1 The shown method prepares cobalt-iron bimetallic phosphating nanoparticles based on nitrogen-doped carbon, and the steps are as follows:

[0027] Step 1. Preparation of nitrogen-doped carbon matrix: 1.5g of zinc nitrate hexahydrate, 0.5g of glucose, and 1mg / ml of carbon nanotubes were dissolved in 50ml of ethanol, the solution was sonicated for 5 minutes, stirred for half an hour, and the tube type under the protection of argon Heated to 200°C in a furnace with a heating rate of 5°C min -1 , the holding time was 2 hours, and the obtained black solid was soaked in hydrochloric acid, washed with ethanol and purified water by suction filtration, and dried overnight to obtain a nitrogen-doped carbon matrix.

[0028] Step 2. Preparation of cobalt-iron bimetallic nanoparticles: using 40mg nitrogen-doped carbon matrix and 0.4ml with a concentration of 0.6molL -1 of cobalt acetate, 0.4ml concentration is 0.6mol L -1 ferric acetate, 1ml ...

Embodiment 2

[0031] The present embodiment prepares cobalt-iron bimetallic phosphating nanoparticles, and the steps are as follows:

[0032] Step 1. Preparation of cobalt-iron bimetallic nanoparticles: use 0.4ml with a concentration of 0.6mol L -1 of cobalt acetate, 0.4ml concentration is 0.6mol L -1 ferric acetate, 1ml of ammonia water, 48ml of ethanol, etc. to form a solution, stirred overnight, and then put into a high-pressure reactor for hydrothermal reaction. Ethanol was filtered, washed and dried overnight to obtain cobalt-iron bimetallic nanoparticles.

[0033] Step 2. Preparation of cobalt-iron bimetallic phosphide nanoparticles: 40 mg of cobalt-iron bimetallic phosphide nanoparticles and 400 mg of sodium hypophosphite were heated and kept in a tube furnace under argon protection, the reaction temperature was 350 °C, and the heating rate was 4 °C min -1 , the holding time is 2 hours, and cobalt-iron bimetallic phosphating nanoparticles are finally obtained.

Embodiment 3

[0035] This embodiment is as follows figure 1 The shown method prepares cobalt-iron bimetallic phosphating nanoparticles based on nitrogen-doped carbon, and the steps are as follows:

[0036] Step 1. Preparation of nitrogen-doped carbon matrix: 1.5g of zinc nitrate hexahydrate, 0.5g of glucose, and 1mg / ml of carbon nanotubes were dissolved in 50ml of ethanol, the solution was sonicated for 5 minutes, stirred for half an hour, and the tube type under the protection of argon Heated to 200°C in a furnace with a heating rate of 5°C min -1 , the holding time was 2 hours, and the obtained black solid was soaked in hydrochloric acid, washed with ethanol and purified water by suction filtration, and dried overnight to obtain a nitrogen-doped carbon matrix.

[0037] Step 2. Preparation of cobalt-iron bimetallic nanoparticles: using 40mg nitrogen-doped carbon matrix and 0.2ml concentration of 0.6molL -1 of cobalt acetate, 0.6ml concentration is 0.6mol L -1 Ferric acetate, 1ml ammonia...

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Abstract

The invention discloses ferrocobalt bimetallic phosphating nano-particles with nitrogen-doped carbon as a substrate and a preparation method and application of the ferrocobalt bimetallic phosphating nano-particles, and belongs to the field of electro-catalytic materials. The preparation method comprises the following steps: preparing a spongy nitrogen-doped carbon matrix by adopting high-temperature carbonization, directly growing and preparing ferrocobalt bimetallic nanoparticles on the carbon matrix by adopting a solvothermal method, and then phosphorizing at low temperature. The ferrocobalt bimetallic phosphating nano-particles with the nitrogen-doped carbon as the substrate serve as an electro-catalysis material to be applied to an electro-catalysis hydrogen evolution reaction of an acid electrolyte and an alkaline electrolyte, the hydrogen evolution performance in the acid electrolyte of 0.5 M sulfuric acid reaches 150 mV, and the hydrogen evolution performance in the alkaline electrolyte of 1.0 M potassium hydroxide reaches 193 mV; moreover, the catalyst has good complete water splitting and cycling stability, the preparation process is simple, and industrial application is facilitated.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and in particular relates to cobalt-iron bimetallic phosphating nanoparticles based on nitrogen-doped carbon and a preparation method and application thereof. Background technique [0002] Electrocatalysis is a kind of catalysis that accelerates the reaction by charge transfer at the interface of electrode and electrolyte. The scope of electrode catalysts is limited to electrical materials such as metals and semiconductors. Electrocatalysis researches are mostly nickel skeleton, nickel boride, tungsten carbide, sodium tungsten bronze, spinel-type and tungsten-type semiconductor oxides, as well as various metal compounds and catalysts such as phthalocyanine. Electrocatalytic treatment of organic sewage, electrocatalytic degradation of chromium-containing wastewater, electrolytic desulfurization of flue gas and raw coal, electrolytic reduction of carbon dioxide and nitrogen, etc. With the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/057C25B11/091
CPCC25B1/04C25B11/091C25B11/057Y02W10/37Y02E60/36
Inventor 徐书生文艺史雪荣邵晓璇
Owner SHANGHAI UNIV OF ENG SCI
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