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Self-supporting layered bimetallic phosphide-graphdiyne composite catalyst as well as preparation method and application thereof

A composite catalyst, layered bimetallic technology, applied in the field of electrocatalysis, can solve the problems of low storage capacity, limited precious metal catalysts, high price, etc., to improve speed and stability, enrich active sites, and improve electronic interactions. Effect

Active Publication Date: 2022-02-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although noble metal catalysts such as Pt, RuO2, and IrO2 are currently the most effective catalysts for electrochemical hydrogen evolution reaction (OER) and oxygen evolution reaction (OER), their Low storage and high price limit the practical application of these noble metal catalysts

Method used

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  • Self-supporting layered bimetallic phosphide-graphdiyne composite catalyst as well as preparation method and application thereof
  • Self-supporting layered bimetallic phosphide-graphdiyne composite catalyst as well as preparation method and application thereof
  • Self-supporting layered bimetallic phosphide-graphdiyne composite catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Step 1. Carrier pretreatment: before use, cut the nickel foam into small pieces with an area of ​​(1cm×2cm), wash with hydrochloric acid, water, and acetone for 10 minutes each, and blow dry with Ar flow.

[0065] Step 2. Supporting double metal oxides: During the synthesis process, 2mmol Cu(NO 3 ) 2 ·3H 2 O with 2mmol NiCl 2 ·6H 2 O with 12mmol NH 4 Stir and mix F and 18mmol urea, immerse 2 pieces of nickel foam (about 160mg) into the solution, pour the mixture into a 100mL stainless steel reactor, seal the reactor, and heat at 180°C for 12 hours. After the reaction was naturally cooled to room temperature, the sample was washed with water and ethanol, and dried under vacuum at 60°C for 12 hours.

[0066] Step 3. Preparation of double metal oxide-graphyne composite material: then the mixed solution (THF:TMEDA=4:1) of step 2 product and tetrahydrofuran (THF) and tetramethylethylenediamine (TMEDA) is put into three necks Into the bottle, slowly add 8 mg of hexaethy...

Embodiment 2

[0069] Other steps are identical with embodiment 1, and difference is only in step 1 with 3mmol Cu (NO 3 ) 2 ·3H 2 O with 1mmol NiCl 2 ·6H 2 O with 12mmol NH 4 F and 18mmol urea were stirred and mixed to prepare a composite catalyst.

Embodiment 3

[0071] Other steps are identical with embodiment 1, difference is only in step 1 with 1mmol Cu(NO 3 ) 2 ·3H 2 O with 3mmol NiCl 2 ·6H 2 O with 12mmol NH 4 F and 18mmol urea were stirred and mixed to prepare a composite catalyst.

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Abstract

The invention relates to a self-supporting layered bimetallic phosphide-graphdiyne composite catalyst. The catalyst comprises a carrier and an active component, and the active component is a self-supporting layered composite material formed by uniformly dispersing bimetallic phosphide nano particles on graphdiyne; the composite material has a multi-stage ordered structure, and an atomic-scale heterojunction structure is arranged between bimetallic phosphides; the carrier is selected from one or more of foamed nickel, foamed copper, carbon cloth, aluminum oxide and titanium oxide; and the double metals are selected from two of copper, nickel, iron, cobalt, manganese, zinc and molybdenum. The nano electrocatalyst has abundant interface defects and vacancies, enriches active sites, improves the electron interaction, and improves the electrocatalytic performance. In the whole water separation process, the stability is excellent, attenuation will not happen within 24 hours, and the catalyst is suitable for the fields of HER, OER and electrochemical complete water splitting.

Description

technical field [0001] The invention belongs to the field of electrocatalysis, and in particular relates to a composite catalyst of a self-supporting layered bimetallic phosphide and graphyne, a preparation method and an application thereof. Background technique [0002] Electrochemical hydrolysis is currently considered as a promising approach to address the energy shortage caused by the depletion of fossil fuels. High-purity hydrogen produced in electrochemical hydrolysis reactions has received increasing attention as an efficient energy carrier due to its high energy density and environmentally friendly combustion process. Although Pt and RuO 2 , IrO 2 Noble metal catalysts such as noble metals are currently the most efficient catalysts for electrochemical hydrogen evolution reaction (OER) and oxygen evolution reaction (OER), but their low storage capacity and high price limit the practical application of these noble metal catalysts. Therefore, it is an urgent problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04
CPCC25B11/091C25B1/04Y02E60/36
Inventor 高娟马玉荣李雅昕
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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