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Preparation method of Ni-based nonmetal doped catalyst

A non-metal and catalyst technology, which is applied in the field of preparation of Ni-based non-metal doped catalysts, can solve the problems of cumbersome preparation method of direct calcination method, difficult Ni-based sulfide, and harsh reaction conditions, so as to avoid inflammable, explosive and toxic , low cost and simple method

Pending Publication Date: 2021-07-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The microwave heating method requires extremely high equipment, and the preparation method of the direct calcination method is cumbersome, and the reaction time is long, the reaction conditions are relatively harsh, and because there are many valence states of Ni and S, it is not easy to successfully synthesize pure-phase Ni-based sulfides.
Most of the methods for preparing nickel nitride use ammonia gas as the nitrogen source, and Ni-based nitrides are obtained by high-temperature reduction. However, ammonia gas is easy to burn, explode and has high toxicity at high temperatures, which is not conducive to industrialization.

Method used

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  • Preparation method of Ni-based nonmetal doped catalyst
  • Preparation method of Ni-based nonmetal doped catalyst
  • Preparation method of Ni-based nonmetal doped catalyst

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preparation example Construction

[0081] As an aspect of the present invention, a preparation method of a Ni-based non-metal doped catalyst of the present invention comprises the following steps:

[0082] S1, ultrasonically clean the NF pieces in hydrochloric acid with a concentration of 5-20wt% for 5-10min, then place them in water for ultrasonic cleaning for 5-10min, and finally place them in ethanol for ultrasonic cleaning for 5-10min to remove impurities on the surface of NF. After completion, take out the vacuum drying to obtain clean NF;

[0083] S2, using Ni salt, organic alcohol and N,N-dimethylformamide (abbreviation: DMF) as raw materials, ultrasonically stir evenly and transfer to a polytetrafluoroethylene reaction kettle; place the clean NF obtained in step S1 in the reaction kettle , the reaction was sealed and heated, then cooled to room temperature, and the Ni(OH) was washed with ultrapure water and absolute ethanol. 2 / NF precursor and vacuum drying to obtain Ni(OH) 2 / NF precursor;

[0084]...

Embodiment 1

[0137] A preparation method of Ni-based non-metal doped catalyst, preparing NiO / NF, comprising the following steps:

[0138] 1) One piece of NF with a thickness of 2*3cm, a thickness of 1mm and a porosity of 90% was ultrasonically cleaned for 5 minutes in a beaker containing 20ml of dilute hydrochloric acid with a mass fraction of 5%, and then placed in a beaker containing 20ml of deionized water. Ultrasonic cleaning was carried out for 5 minutes, and finally ultrasonic cleaning was carried out in a beaker containing 20 ml of absolute ethanol for 5 minutes.

[0139] 2) Weigh 150mg of nickel nitrate hexahydrate and place it in a beaker, add 15ml of methanol and 1ml of DMF, and after stirring, transfer the light green clear solution to the lining of a 25ml polytetrafluoroethylene hydrothermal kettle, and place the clean and dry NF in a In the inner lining, after sealing, put it in a drying box at 120 °C for 8 hours, and after cooling to room temperature, rinse it with deionized ...

Embodiment 2

[0142] Example 1 was repeated, except that, in step 1), the temperature was raised to 350° C. at a heating rate of 3° C. / min.

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Abstract

The invention discloses a preparation method of a Ni-based nonmetal doped catalyst. The preparation method can synthesize NiO / NF, NiS2 / NF and Ni3N / NF. The method comprises the following steps of: taking reticular porous foamed nickel as a structural framework, synthesizing a Ni (OH) 2 / NF precursor by a hydrothermal method; and then vertically growing a NiO nanosheet (NiO / NF for short), a NiS2 nanosheet (NiS2 / NF for short) and a Ni3N nanoflower (Ni3N / NF for short) on the surface of the foamed nickel in a tubular furnace calcination form. The method is simple to operate and mild in preparation condition, adopts the S source, the N source and transition metal raw materials, and is relatively low in cost. The prepared Ni-based non-metal doped catalyst can be used in the fields of electrochemical catalysis, such as oxygen evolution reaction, hydrogen evolution reaction, oxygen reduction reaction, electrocatalysis, CO2 reduction, zinc-air batteries, lithium batteries and industrial catalysis, so as to treat industrial wastewater and waste gas.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a preparation method of a Ni-based non-metal doped catalyst. Background technique [0002] Ni-based non-metal doped catalysts such as Ni nitrides, sulfides, oxides, phosphides, etc. are used in electrocatalysis such as oxygen evolution reaction (OER), hydrogen evolution reaction (HER), CO 2 Reduction and other fields such as industrial treatment of waste water and waste gas, semiconductor fields have a wide range of application value. [0003] Ni oxides such as NiO have good catalytic properties, sensing properties, good thermal and gas-sensing properties, and can be used in anode electrochromic materials, industrial wastewater treatment, semiconductor fields, gas sensors, electrochemical hydrogen evolution reaction, super Capacitors, lithium-ion batteries, solar cells and other fields. [0004] Ni sulfides such as nickel disulfide are considered to be ideal materials for li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J27/043B01J23/755
CPCB01J27/24B01J27/043B01J23/755
Inventor 程道建刘宁曹东吴登峰
Owner BEIJING UNIV OF CHEM TECH