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, long synthesis cycle, low efficiency, and use of toxic reagents, which limit their industrial applications.

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

Experimental program
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Effect test

Embodiment 1

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

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

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

[0035] (3) Potassium tetracyanonickelate 0.3mmol K 2 [Ni(CN) 4 ] was dissolved in 10mL water to obtain an aqueous solution with a nickel precursor concentration o...

Embodiment 2

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

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

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

[0049] (3) Potassium tetracyanonickelate 0.2mmol K 2 [Ni(CN) 4 ] was dissolved in 10mL water to obtain an aqueous solution with a nickel precursor co...

Embodiment 3

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

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

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

[0059] (3) Potassium tetracyanonickelate 0.4mmol K 2 [Ni(CN) 4 ] was dissolved in 10mL water to obtain an aqueous solution with a nickel precursor conc...

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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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