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Transition metal nitrogen-doped phosphide catalyst as well as preparation method and application thereof

A transition metal and catalyst technology, applied in the field of transition metal nitrogen-doped phosphide catalysts and their preparation, can solve the problems of inability to make full use of nitrogen gas for simultaneous nitriding, increase active sites and electron transport capabilities, and improve electrocatalytic performance , Increase the effect of reactivity

Inactive Publication Date: 2020-11-13
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses nitrogen as a protective gas, which can only be used for phosphating, and cannot make full use of nitrogen to achieve simultaneous nitriding

Method used

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  • Transition metal nitrogen-doped phosphide catalyst as well as preparation method and application thereof
  • Transition metal nitrogen-doped phosphide catalyst as well as preparation method and application thereof
  • Transition metal nitrogen-doped phosphide catalyst as well as preparation method and application thereof

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Embodiment 1

[0037] Step 1: First, ultrasonically clean the foamed nickel-cobalt iron with a size of 1cm×1cm×1cm with acetone, then wash with ethanol and deionized water three times respectively, put it in a vacuum drying oven and dry it to obtain the pretreated Transition metal foam.

[0038] Step 2: Transfer the treated metal foam together with 35 mL of deionized water to a Teflon autoclave for hydrothermal reaction. The hydrothermal temperature is 200° C. and the hydrothermal time is 24 hours. After the reaction, the samples were taken out, washed three times with ethanol and deionized water, and then dried in a vacuum oven.

[0039] Step 3, along the direction of the airflow, place the dried sample on a porcelain boat and place it downstream of the tube furnace. Then weigh 0.2g of red phosphorus and spread it on the bottom of another porcelain boat, and place it upstream of the tube furnace. Set the temperature rise control program.

[0040] Step 4, enter N 2 Gas 10min, gas flow rate...

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Abstract

The invention discloses a transition metal nitrogen-doped phosphide catalyst and a preparation method thereof and application of the transition metal nitrogen-doped phosphide catalyst as a hydrogen production catalyst or an oxygen production catalyst. The preparation method comprises the following steps: (1) adding transition metal foam into deionized water, then carrying out a hydrothermal reaction at 160-250 DEG C, and after the reaction is finished, carrying out washing and drying to obtain a transition metal hydroxide catalyst; and (2) putting the obtained transition metal hydroxide catalyst and red phosphorus at two different positions in the same tubular furnace, raising a temperature to 400-700 DEG C in a protective atmosphere, conducting vacuumizing at the temperature until an airpressure in the tubular furnace is 5-100 Pa, then adjusting the power of a radio frequency power supply to 50-200W, carrying out glow discharge on gas in the tubular furnace to generate plasma-assisted phosphorization, and conducting cooling to obtain the transition metal nitrogen-doped phosphide catalyst, wherein the protective atmosphere is nitrogen or mixed gas of nitrogen and rare gas.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a transition metal nitrogen-doped phosphide catalyst and a preparation method and application thereof. Background technique [0002] In recent years, transition metal phosphides have attracted the attention of many researchers due to their excellent electrochemical catalytic performance. However, the traditional preparation methods of precursors all add metal salts for hydrothermal reaction and support them on transition metal foams, resulting in poor stability of electrocatalysts. In addition, if it is widely used in industrial production, the residual metal salt ions will cause environmental pollution. In addition, the catalytic performance of transition metal phosphide catalysts reported so far is still inferior to that of platinum carbon with the same loading. [0003] The patent specification with publication number CN 109208028 A discloses a preparation method of nitrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/10B01J37/28B01J37/34C25B11/06C25B1/04
CPCB01J27/24B01J37/28B01J37/10B01J37/349C25B1/04B01J35/33Y02E60/36
Inventor 陈光良金荣仙
Owner ZHEJIANG SCI-TECH UNIV
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