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FeCo LDH/Ti3C2 MXene/NF composite material as well as preparation method and application thereof

A composite material, s-ti3c2 technology, applied in the field of FeCoLDH/Ti3C2MXene/NF composite material and its preparation, can solve the problems of gas diffusion channel coverage, slow electron transfer rate, few active sites, etc., to achieve optimized binding energy, excellent Hydrophilic, rich end-group effect

Active Publication Date: 2021-11-12
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 3D nano-micro-heterostructure on foamed nickel constructed by the present invention combines two-dimensional sheet-layer conductive materials with one-dimensional nanowires to construct a three-dimensional porous structure based on foamed nickel, thereby solving the problem of slow electron transport rate and active site The problem of few points and gas diffusion channels being covered and blocked

Method used

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  • FeCo LDH/Ti3C2 MXene/NF composite material as well as preparation method and application thereof
  • FeCo LDH/Ti3C2 MXene/NF composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A FeCo LDH / Ti 3 C 2 The preparation method of MXene / NF composite material and application thereof, comprises the following steps:

[0038] S1: Add 1g LiF powder in 20mL 9M HCl solution, then slowly add Ti 3 AlC 2 powder, stirred and etched in an oil bath at 35°C for 24 hours, then repeatedly centrifuged and washed with deionized water until PH = 6 to obtain multilayer Ti 3 C 2 T x precipitation. Ti 3 C 2 T x The precipitate was redispersed in deionized water, and the monolayer s-Ti stripped from the upper layer was collected by centrifugation 3 C 2 suspension, and the s-Ti was collected by centrifugation 3 C 2 Precipitate to get s-Ti 3 C 2 solid;

[0039] S2: put s-Ti 3 C 2 Solid redispersed to form 4mg mL -1 Suspension, immerse foam nickel (NF), form MXene / NF by electrostatic self-assembly; MXene / NF, 1.5mmolFeCl 3 , 1.5mmol CoCl 2 ·6H 2 0. Add 12mmol of urea to the mixed solution of 40mL deionized water and ethanol, transfer it to the reactor for ...

Embodiment 2

[0043] A FeCo LDH / Ti 3 C 2 The preparation method of MXene / NF composite material and application thereof, comprises the following steps:

[0044] S1: Add 1g LiF powder in 20mL 9M HCl solution, then slowly add Ti 3 AlC 2 powder, stirred and etched in an oil bath at 35°C for 24 hours, then repeatedly centrifuged and washed with deionized water until PH = 6 to obtain multilayer Ti 3 C 2 T x precipitation. Ti 3 C 2 T x The precipitate was redispersed in deionized water, and the monolayer s-Ti stripped from the upper layer was collected by centrifugation 3 C 2 suspension, and the s-Ti was collected by centrifugation 3 C 2 Precipitate to get s-Ti 3 C 2 solid;

[0045] S2: put s-Ti 3 C 2 Solid redispersed to form 5mg mL -1 Suspension, immerse foam nickel (NF), form MXene / NF by electrostatic self-assembly; MXene / NF, 1.5mmolFeCl 3 , 1.5mmol CoCl 2 ·6H 2 0. Add 12mmol of urea to the mixed solution of 40mL deionized water and ethanol, transfer it to the reactor for ...

Embodiment 3

[0048] A FeCo LDH / Ti 3 C 2 The preparation method of MXene / NF composite material and application thereof, comprises the following steps:

[0049] S1: Add 1g LiF powder in 20mL 9M HCl solution, then slowly add Ti 3 AlC 2 powder, stirred and etched in an oil bath at 35°C for 24 hours, then repeatedly centrifuged and washed with deionized water until PH = 6 to obtain multilayer Ti 3 C 2 T x precipitation. Ti 3 C 2 T x The precipitate was redispersed in deionized water, and the monolayer s-Ti stripped from the upper layer was collected by centrifugation 3 C 2 suspension, and the s-Ti was collected by centrifugation 3 C 2 Precipitate to get s-Ti 3 C 2 solid;

[0050] S2: put s-Ti 3 C 2 Solid redispersed to form 6mg mL -1 Suspension, immerse foam nickel (NF), form MXene / NF by electrostatic self-assembly; MXene / NF, 1.5mmolFeCl 3 , 1.5mmol CoCl 2 ·6H 2 0. Add 12mmol of urea to the mixed solution of 40mL deionized water and ethanol, transfer it to the reactor for ...

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Abstract

The invention relates to a FeCo LDH / Ti3C2 MXene / NF composite material as well as a preparation method and application thereof. The method comprises the steps of adding LiF powder into an HCl solution, then adding Ti3AlC2 powder, carrying out oil bath stirring etching, and carrying out centrifugal washing to obtain a multi-layer Ti3C2Tx precipitate; re-dispersing the Ti3C2Tx precipitate in deionized water, collecting a single-layer s-Ti3C2 suspension liquid stripped on the upper layer in a centrifugal mode, and then collecting the s-Ti3C2 precipitate in a centrifugal mode to obtain a stripped single-layer s-Ti3C2 solid; dispersing the s-Ti3C2 solid again to form a solution, immersing foamed nickel in the solution, and forming MXene / NF through electrostatic self-assembly; and carrying out one-step hydrothermal reaction on the MXene / NF, FeCl3, CoCl2.6H2O and urea, cooling, washing and drying to obtain the FeCo LDH / Ti3C2 MXene / NF composite material. Compared with the prior art, the FeCo LDH / Ti3C2MXene / NF composite material prepared by the invention has a unique sea urchin type filamentous structure and provides effective active sites, and the high porosity of the three-dimensional porous foamed nickel can promote the diffusion of electrolyte and the transfer of electrons.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a FeCo LDH / Ti 3 C 2 MXene / NF composites and their preparation methods and applications. Background technique [0002] Electrochemical water splitting hydrogen production technology (2H 2 O=O 2 +2H 2 ) is considered to be one of the most promising energy storage and conversion methods. The electrochemical water splitting process consists of two half-reactions, the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER). Slow OER kinetics due to multi-proton process and high energy barrier will become the bottleneck of electrochemical water splitting hydrogen production technology. Given this situation, the development of highly efficient electrocatalysts is essential. [0003] RuO 2 / IrO 2 Based electrocatalysts show the best OER activity. However, unaffordable cost and poor durability further hinder the development of electrocata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B11/061C25B11/054C25B1/04
CPCC25B11/091C25B11/061C25B11/054C25B1/04Y02E60/36
Inventor 蒋继波李明晶许文秀孙冉黄星李雨露魏影陈晓敏李婷婷周少博宣宇娜王云云丛海山唐佳斌韩生
Owner SHANGHAI INST OF TECH
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