Sulfur-nitrogen co-doped porous carbon supported ternary transition metal composite material and preparation method thereof

A technology of transition metals and composite materials, which is applied in the electrolysis process, electrodes, electrolysis components, etc., can solve the problems of complex catalyst preparation methods, use of toxic reagents, long synthesis cycle, etc., to reduce atomic aggregation, improve activity and stability, The effect of large specific surface area

Active Publication Date: 2021-08-06
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, such catalysts that have been reported have disadvantages such as complex preparation methods

Method used

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  • Sulfur-nitrogen co-doped porous carbon supported ternary transition metal composite material and preparation method thereof
  • Sulfur-nitrogen co-doped porous carbon supported ternary transition metal composite material and preparation method thereof
  • Sulfur-nitrogen co-doped porous carbon supported ternary transition metal composite material and preparation method thereof

Examples

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Example Embodiment

[0031] Example 1

[0032] A preparation method of a sulfur-nitrogen co-doped porous carbon-supported ternary transition metal composite material, comprising the following steps:

[0033] (1) Under the condition of 25 °C, 0.15 mmol of iron tetrafluoroborate Fe (BF 4 ) 2 , 0.15mmol cobalt nitrate Co(NO 3 ) 2 Dissolved in 40 mL of a mixed solution with a volume ratio of methanol and water of 1:1 to obtain a mixed solution with a concentration of iron precursor and cobalt precursor of 0.00375 mol / L, as solution A;

[0034] (2) Dissolve 3 mmol of surfactant K-29 type polyvinylpyrrolidone (PVP) and 0.3 mmol of organic ligand dipyridyl disulfide in 40 mL of a mixed solution with a volume ratio of methanol and water of 1:1, and ultrasonicate for 2 min to obtain a mixed solution. A mixed solution with a bulk concentration of 0.0075 mol / L was taken as solution B;

[0035] (3) 0.3 mmol K of potassium tetracyanonickelate 2 [Ni(CN) 4 ] was dissolved in 10 mL of water to obtain an aq...

Example Embodiment

[0045] Example 2

[0046] A preparation method of a sulfur-nitrogen co-doped porous carbon-supported ternary transition metal composite material, comprising the following steps:

[0047] (1) Under the condition of 25 °C, 0.1 mmol of iron tetrafluoroborate Fe (BF 4 ) 2 and 0.1 mmol cobalt nitrate Co(NO 3 ) 2 Dissolved in 40 mL of a mixed solution with a volume ratio of methanol and water of 1:1 to obtain a mixed solution of iron precursor and cobalt precursor concentration of 0.0025 mol / L, as solution A;

[0048] (2) Dissolve 4 mmol of surfactant K-29 type polyvinylpyrrolidone (PVP) and 0.2 mmol of organic ligand dipyridyl disulfide in 40 mL of a mixed solution with a volume ratio of methanol and water of 1:1, and ultrasonicate for 2 min to obtain a mixed solution. A mixed solution with a bulk concentration of 0.005 mol / L was taken as solution B;

[0049] (3) 0.2 mmol K of potassium tetracyanonickelate 2 [Ni(CN) 4 ] was dissolved in 10 mL of water to obtain an aqueous so...

Example Embodiment

[0055] Example 3

[0056] A preparation method of a sulfur-nitrogen co-doped porous carbon-supported ternary transition metal composite material, comprising the following steps:

[0057] (1) Under the condition of 25 °C, 0.2 mmol of iron tetrafluoroborate Fe (BF 4 ) 2 and 0.2 mmol cobalt nitrate Co(NO 3 ) 2 Dissolved in 40 mL of a mixed solution with a volume ratio of methanol and water of 1:1 to obtain a mixed solution with a concentration of iron precursor and cobalt precursor of 0.005 mol / L, as solution A;

[0058] (2) Dissolve 8 mmol of surfactant K-29 type polyvinylpyrrolidone (PVP) and 0.4 mmol of organic ligand dipyridyl disulfide in 40 mL of a mixed solution with a volume ratio of methanol and water of 1:1, and ultrasonicate for 2 min to obtain a mixed solution. A mixed solution with a bulk concentration of 0.01 mol / L was taken as solution B;

[0059] (3) 0.4 mmol K of potassium tetracyanonickelate 2 [Ni(CN) 4 ] was dissolved in 10 mL of water to obtain an aqueo...

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Abstract

The invention discloses a sulfur-nitrogen co-doped porous carbon supported ternary transition metal composite material. The chemical formula of the sulfur-nitrogen co-doped porous carbon supported ternary transition metal composite material is (Co,Ni,Fe)9S8/NSCSs; and (Co,Ni,Fe)9S8/NSCSs is spindle-shaped and comprises the following elements in percentage by mass: 1-2 wt% of N, 3-5 wt% of O, 3-4 wt% of S, 3-5 wt% of Fe, 4-5 wt% of Co and 6-8 wt% of Ni, with the balance being C. The invention further discloses a preparation method of the sulfur-nitrogen co-doped porous carbon supported ternary transition metal composite material. According to the ternary transition metal composite material prepared by the method, due to a unique electronic structure of a metal-sulfur bond, a synergistic effect among CoNiFe ternary components and N-and-S-heteroatom co-doped carbon, high-activity sites are provided, so the (Co,Ni,Fe)9S8 ternary metal sulfide has better electrochemical performance than a commercial RuO2 catalyst.

Description

technical field [0001] The invention relates to a ternary transition metal composite material and a preparation method thereof, in particular to a ternary transition metal composite material supported by sulfur and nitrogen co-doped porous carbon and a preparation method thereof. Background technique [0002] Hydrogen production by electrolysis of water is considered to be a clean and effective renewable energy approach to solve the energy crisis and severe environmental pollution caused by fossil fuels. Oxygen evolution reaction (OER), one of the half-reactions of electrolysis of water, due to its slow kinetics and high overpotential, leads to high energy consumption in practical applications, which seriously hinders the commercial development of hydrogen production technology by electrolysis of water. For a long time, electrocatalysts with high oxygen evolution activity are usually noble metal Ir, Ru-based materials. However, the rarity of these two elements determines th...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/04
CPCC25B11/04C25B1/04Y02E60/36
Inventor 袁爱华苏珊卞婷王浩权于涛
Owner JIANGSU UNIV OF SCI & TECH
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