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A kind of preparation method and application of efficient and stable bifunctional catalyst

A bifunctional catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of rare reports on bifunctional catalysts

Active Publication Date: 2022-03-29
WUHAN HYNERTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on bifunctional catalysts for electrocatalytic hydrogen evolution and oxygen reduction reactions.

Method used

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  • A kind of preparation method and application of efficient and stable bifunctional catalyst
  • A kind of preparation method and application of efficient and stable bifunctional catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 30g of manganese nitrate and 10g of nickel nitrate, then stir and mix with 40g of polyethylene glycol, and stir at 60°C for 48h; after stirring, add dilute nitric acid with a mass ratio of 10% dropwise to adjust the pH of the solution to 2;

[0023] (2) Load the mixed solution into a hydrothermal reaction kettle, and conduct hydrothermal reaction at 200°C for 48h;

[0024] (3) the hydrothermal reaction finishes, suction filtration and wash the reactant to neutrality with ultrapure water and ethanol, and fully dry at 60°C;

[0025] (4) calcining the dried product at high temperature for 2h to obtain a bimetallic oxide product;

[0026] (5) put the product into the high temperature and high pressure reaction kettle, 150 ℃, 3MPa hydrogen pressure, heating reaction for 2h to obtain H 0.3 Mn 0.66 Ni 0.34 O 3 .

[0027] (6) 10g H 0.3 Mn 0.66 Ni 0.34 O 3 Disperse into 50mL of ethylene glycol / water solution, add 1.1mL of chloroplatinic acid solution 1g / mL dro...

Embodiment 2

[0029] (1) Weigh 10g of manganese nitrate, 6.6g of nickel nitrate and 12.7g of chromium nitrate, then stir and mix with polyethylene glycol, and stir at 60°C for 48h; after stirring, add dilute nitric acid with a mass ratio of 10% dropwise to adjust the pH of the solution to 2;

[0030] (2) Load the mixed solution into a hydrothermal reaction kettle, and conduct hydrothermal reaction at 200°C for 48h;

[0031] (3) the hydrothermal reaction finishes, suction filtration and wash the reactant to neutrality with ultrapure water and ethanol, and fully dry at 60°C;

[0032] (4) calcining the dried product at high temperature for 2h to obtain a trimetallic oxide product;

[0033] (5) put the product into the high temperature and high pressure reaction kettle, 150 ℃, 3MPa hydrogen pressure, heating reaction for 4h to obtain H 0.5 Mn 0.2 Ni 0.2 Cr 0.6 O 3 .

[0034] (6) 10g H 0.5 Mn 0.2 Ni 0.2 Cr 0.6 O 3 Disperse into 50mL of ethylene glycol / water solution, add dropwise 0.42...

Embodiment 3

[0036] 1. Pt / H 0.3 Mn 0.66 Ni 0.34 O 3 Preparation method of catalyst solution

[0037] Weigh 2.0mg Pt / H 0.3 Mn 0.66 Ni 0.34 O 3 The catalyst (hereinafter referred to as the catalyst) was dispersed in 1 mL of absolute ethanol, 11.2 μL of 5.0 wt% Nafion solution was added, and sonicated for 1 h to make the catalyst dispersed uniformly.

[0038] 2. Electrode spraying method

[0039] The treated glassy carbon electrode is fixed, and the ultrasonic catalyst solution is evenly added dropwise to the glassy carbon electrode to make it evenly distributed in the effective area of ​​the glassy carbon electrode. For follow-up testing.

[0040] 3. Activation of the catalyst

[0041] Using a three-electrode system, the working electrode is the prepared carbon paper electrode; the counter electrode is a carbon rod; the reference electrode is a saturated calomel electrode; the electrolyte is 0.5mol / L H 2 SO 4 solution;

[0042] CV activation: using Gamry electrochemical workstat...

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Abstract

The invention discloses a preparation method of a binary and ternary transition metal hydride catalyst and its application in electrocatalytic hydrogen evolution and fuel cells. The molecular formula of the catalyst is Pt / H x m a R b Y c o 3 , where M, R, Y are three different transition metals, x value is 0.01~1, 0≤a<1, 0≤b<1, 0≤c<1, a+b+c=1, in the catalyst The mass content of Pt is 0.01%-20%. Pt / H for this application x m a R b Y c o 3 As a catalyst for electrolysis of water, its electrochemical performance in acidic electrolytes is comparable to that of commercial carbon-supported platinum catalysts, and the Pt / H x m a R b Y c o 3 It has extremely high stability, and the preparation process is simple and easy to scale up. Therefore, it can be used as a substitute for carbon-supported platinum catalysts to effectively reduce the cost of hydrogen production. Such bifunctional catalysts with electrocatalytic hydrogen evolution and oxygen reduction reactions have never been reported.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a preparation method of binary and ternary transition metal hydrides and its application in electrocatalytic hydrogen evolution and fuel cells. Background technique [0002] Hydrogen energy is the most ideal green energy in the 21st century, with the characteristics of cleanness and high efficiency. At present, there are three main technologies for the preparation of hydrogen energy, namely hydrogen production from fossil fuels, hydrogen production from water splitting and hydrogen production from biomass raw materials. Among them, electrolyzed water hydrogen production technology has become the research focus of countries around the world because of its simple process, no pollution, high product purity, and strong applicability. Renewable energy water is used as the most basic raw material for water electrolysis to produce hydrogen. At present, the production of hydrogen pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92B01J23/89
CPCY02E60/50
Inventor 程寒松杨泽惠
Owner WUHAN HYNERTECH CO LTD
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