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Nickel-iron-based catalyst as well as preparation and application thereof

A nickel-iron-based catalyst technology, applied in the field of electrochemistry, can solve problems such as high price, low reserves, and restricted development, and achieve excellent results, simple synthesis methods, and low overpotential effects

Active Publication Date: 2022-04-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently commercialized electrocatalytic oxygen evolution catalysts are Ru-based noble metal catalysts, which restrict their development due to their low natural reserves and high prices.

Method used

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  • Nickel-iron-based catalyst as well as preparation and application thereof
  • Nickel-iron-based catalyst as well as preparation and application thereof
  • Nickel-iron-based catalyst as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1, High Performance NIFE Base Power Catalytic Oxygen Catalyst NIFE 0.2 (OOH) 1.2 Preparation and electrical catalytic epoxy test

[0050] 1) Precarrier NIFE 0.2 -FE PBA preparation

[0051] First take 987.8mg K 3 [Fe (CN) 3 ] Soluble in a beaker with 300 ml ultrapure water volume of 500 ml (10moll -1 ), Ultrasound makes it fully dissolved; followed by Ni 3+ (Moor) of nickel ions in metal nickel salt): Fe 3+ (Metal iron salt in iron ion): [FE (CN) 6 ] 3+ (Mole) of Cryanate in Cyanate) = 1: M: (M + 2 / 3) ratio, value m = 0.2, configure NICL 2 · 6h 2 O and FECL 3 · 6h 2 O. Mixed solution, ie 822.8 mg NiCl, respectively 2 · 6h 2 O and 300mg 197.1mg fecl 3 · 6h 2 O Soluble in a 1L beaker in 300ml, while adding the reactant (K 3 [Fe (CN)3 ], NICL 2 · 6h 2 O and FECL 3 · 6h 2 O) 8% of total mass (accounted for NICL 2 · 6h 2 O and FECL 3 · 6h 2 O metal salt mass 15.7%) of the conductive material 161mg (a carbon nanotube having an outer diameter of 10-20 μm, length of 5-15 μm...

Embodiment 2

[0067] Example 2, High Performance NIFE Base Power Catalytic Oxygen Catalyst NIFE 0.25 (OOH) 1.25 Preparation and electrical catalytic epoxy test

[0068] 1) Precarrier NIFE 0.25 -FE PBAS preparation

[0069] First take 987.8mg K 3 [Fe (CN) 3 ] Soluble in a beaker with 300 ml ultrapure water volume of 500 ml (10moll -1 ), Ultrasound makes it fully dissolved; followed by Ni 3+ (Moor) of nickel ions in metal nickel salt): Fe 3+ (Metal iron salt in iron ion): [FE (CN) 6 ] 3+ (Mole) of Cryanate in Cyanate) = 1: M: (M + 2 / 3) ratio, value m = 0.2, configure NICL 2 · 6h 2 O and FECL 3 · 6h 2 O The mixed solution, ie 777.9mg NiCl, respectively. 2 · 6h 2 O and 300mg 221.2mg fecl 3 · 6h 2 O Soluble in a 1L beaker in 300ml, while adding the reactant (K 3 [Fe (CN) 3 ], NICL 2 · 6h 2 O and FECL 3 · 6h 2 O) 8% of total mass (accounted for NICL 2 · 6h 2 O and FECL 3 · 6h 2 The total mass of the total mass of the metal is 159.0mg (the outer diameter of 10-20 μm, the length of 5-15 μm is 5-15 μm) ...

Embodiment 3

[0085] Example 3, High Performance NIFE Base Power Catalytic Oxygen Catalyst NIFE 0.11 (OOH) 1.11 Preparation and electrical catalytic epoxy test

[0086] Example 3 Exploring the precursor NIFE 0.11 -FE PBA synthetic reactant Ni 3+ (Moor) of nickel ions in metal nickel salt): Fe 3+ (Metal iron salt in iron ion): [FE (CN) 6 ] 3+ (Mole) = 1: M: (M + 2 / 3) ratio of C C cyssate is the same as in Example 1, and the remaining steps are the same as in Example 1 (K 3 [Fe (CN) 3 ] The amount is unchanged). The value M = 0.11 is taken in this embodiment.

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Abstract

The invention relates to preparation and application of an electrocatalytic material for electrocatalytic oxygen evolution reaction (water oxidation reaction). The catalytic material is mainly a nickel-iron-based catalytic material (NiFemm (OOH) 1 + m), and the material is obtained by performing ion exchange on a synthesized Prussian blue analogue precursor under an alkaline condition and then further activating. The structure of the material is nickel-iron oxyhydroxide, and the material is applied to an electrolytic water reaction anode electro-catalysis oxygen evolution reaction. According to the method, the overpotential of the anode oxygen evolution reaction in the electrolyzed water is greatly reduced (the overpotential is only 263 mV when the current density reaches 10 mAcm <-2 >, and the Tafel slope is only 35 mV dec-1), the catalyst performance is remarkably improved, and the method is obviously superior to a commercial noble metal RuO2 catalyst and is better than a NiFe-based hydroxide catalyst generated by a conventional means. The cost of hydrogen production through water electrolysis can be effectively reduced, and the requirements of commercial production are completely met.

Description

Technical field [0001] The present invention belongs to the electrochemical field, and more particularly to the preparation method of nickel-iron-based catalyst of electrolytic water anodation (water oxidation). Background technique [0002] The shortage of non-renewable fossil energy and increasingly prominent environmental problems have forced people to seek alternative new energy. Hydrogen is used as an efficient, non-polluting new energy, which has attracted attention in new energy sectors such as fuel cells. However, high-purity hydrogen production is subject to high cost, but it is difficult to have a large-scale commercial application. Electrolytic water hydrogen can utilize solar energy, wind energy, etc. It cannot be used as an energy source, directly generate high purity hydrogen and oxygen to meet the needs of new energy markets. [0003] The anode oxygen-based oxygen reaction of electrolytic water hydrogen has a high over-potential with respect to the cathode hydrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/34B01J37/30C25B1/04C25B11/075
CPCY02E60/36
Inventor 匡智崇王军虎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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