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Nano-rod array composite material as well as preparation method and application thereof

A nanorod array and composite material technology, applied in the field of nanorod array composite materials, can solve the problems of easy deactivation, low reserves, high price, etc., and achieve the effects of simple operation, large specific surface area, and high catalytic activity.

Active Publication Date: 2018-11-16
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most active hydrogen evolution reaction catalyst is Pt-based materials, while the highly active oxygen evolution reaction catalyst is RuO 2 and IrO x materials, but these noble metal materials have limited their large-scale application due to the disadvantages of low reserves, high price, and easy deactivation. Therefore, the controllable synthesis of non-noble metal-based nano-electrocatalysts has become a research hotspot.
In recent years, scientists at home and abroad have successfully synthesized various materials such as transition metal sulfides, phosphides, hydroxides, and phosphates, and have made some progress in the performance of catalytic hydrogen and oxygen production. There are still some problems in the synthesis method and other aspects

Method used

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  • Nano-rod array composite material as well as preparation method and application thereof
  • Nano-rod array composite material as well as preparation method and application thereof
  • Nano-rod array composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Foam nickel pretreatment: Soak a piece of 6cm×10cm foam nickel (NF, pore size 200-500μm, Shenzhen Tianchenghe Co., Ltd.) in 1M HCl for 20 minutes to remove surface oxides, then wash with water and ethanol, dry, weigh Heavy.

[0033] Weigh 0.843g CoSO 4 ·7H 2 O, 0.723g Na 2 MoO 4 2H 2 O and 0.685g CH 4 N 2 S (cobalt, molybdenum, sulfur molar ratio 1:1:3) was added to 80mL reactor, then 33mL water and 12.36g hydrazine hydrate aqueous solution (mass fraction 80%, volume 15mL) were added, after stirring for 30 minutes, NF was added to seal the reaction Reactor in an oven at 200°C for 24h. Cool naturally to room temperature, wash with water and ethanol alternately, and dry the product in a vacuum oven at 40°C for 24 hours to obtain a composite material, denoted as Co 9 S 8 / MoS 2 / Ni 3 S 2 / NF. Co in the composite 9 S 8 、MoS 2 and Ni 3 S 2 The total loading capacity is 1.85mg·cm -2 ).

Embodiment 2

[0035] Prepare Co according to the method of embodiment 1 9 S 8 / MoS 2 / Ni 3 S 2 / NF nanorod array composite material, the difference from Example 1 is: the nickel foam pretreatment process is: nickel foam (NF) is soaked in 0.8M HCl for 30 minutes.

Embodiment 3

[0037] Prepare Co according to the method of embodiment 1 9 S 8 / MoS 2 / Ni 3 S 2 / NF nanorod array composite material, the difference from Example 1 is: the nickel foam pretreatment process is: nickel foam (NF) is soaked in 1.2M HCl for 10 minutes.

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Abstract

The embodiment of the invention provides a Co9S8 / MoS2 / Ni3S2 / NF nano-rod array composite material which is characterized in that foamed nickel is taken as a substrate and is partially vulcanized to form a Ni3S2 nano-rod, and the Ni3S2 nano-rod is arranged to grow on the foamed nickel substrate; Co9S8 and MoS2 respectively grow on the Ni3S2 nano-rod in the form of ultra-thin nano-sheets. The Co9S8 / MoS2 / Ni3S2 / NF nano-rod array composite material provided by the invention can simultaneously catalyze the OER and HER reaction and is a bifunctional catalyst; as the material is assembled by the ultra-thin nano-sheets, the material has large specific surface area and multiple exposed active sites; meanwhile, the foamed nickel with good electrical conductivity is introduced as the substrate, so thathe electrical conductivity is good, and the catalytic activity is high; the composite material is synthesized by a one-step hydrothermal process and is simple and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of nanorod array composite materials, in particular to a Co 9 S 8 / MoS 2 / Ni 3 S 2 / NF nanorod array composite material and its preparation method and application. Background technique [0002] Hydrogen and oxygen are produced by electrolysis of water, which efficiently stores a large amount of electrical energy in chemical bonds, solves the difficulty of storing electrical energy, and also obtains zero pollution, high calorific value, and recyclable hydrogen energy. It is an efficient preparation of clean, Technologies for sustainable energy. However, the occurrence of the two half-reactions (hydrogen evolution reaction HER and oxygen evolution reaction OER) of the water splitting reaction requires a large activation energy barrier, and suitable catalysts are needed to reduce the energy barrier and overpotential of these two half-reactions. [0003] At present, the most active hydrogen evolution react...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/10C25B11/06C25B1/04
CPCC25B1/04C25B11/04B01J27/0515B01J35/33B01J35/61Y02E60/36
Inventor 马淑兰杨燕史可人孙根班
Owner BEIJING NORMAL UNIVERSITY
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