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Lamellar micron flower-like MoS2/Ni3S2/NiFe-LDH/NF material, synthesis method and application thereof

A synthesis method and sheet-layer technology, applied in the synthesis and application of electrocatalytic materials, can solve the problems of high-cost industrial production of noble metal-based catalysts, and achieve good dual-functional catalytic activity, good application prospects, high catalytic activity and stability Effect

Active Publication Date: 2019-10-15
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ir (or Ru) and Pt-based catalysts are excellent OER and HER catalysts, respectively, but the scarcity and high cost of noble metal-based catalysts prevent them from being widely used in industrial production

Method used

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  • Lamellar micron flower-like MoS2/Ni3S2/NiFe-LDH/NF material, synthesis method and application thereof
  • Lamellar micron flower-like MoS2/Ni3S2/NiFe-LDH/NF material, synthesis method and application thereof
  • Lamellar micron flower-like MoS2/Ni3S2/NiFe-LDH/NF material, synthesis method and application thereof

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Embodiment 1

[0054] A kind of sheet-layer micro-flower-like MoS of this embodiment 2 / Ni 3 S 2 The synthetic method of / NiFe-LDH / NF material comprises the steps:

[0055] (1) Foam nickel (NF) pretreatment

[0056] Cut the nickel foam into 2*4cm, ultrasonically clean it with 3M HCl, acetone, ultrapure water, and ethanol for 15 minutes, and dry it in vacuum at 60°C for later use.

[0057] (2) Nanorod array MoS 2 / Ni 3 S 2 Synthesis of / NF

[0058] 0.5 mmol sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) and 2 mmoles of thiourea (CS(NH 2 ) 2 ) into 60 milliliters of ultrapure water, magnetically stirred to form a homogeneous solution, then transferred to 100 milliliters of reactor, then added the pretreated nickel foam in the solution in step (1), the reactor After sealing, put it into a blast drying oven, set the reaction temperature to 200°C, and react at a constant temperature for 24 hours. After the temperature dropped to room temperature, the reacted nickel foam was taken out,...

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Abstract

The invention discloses a lamellar micron flower-like MoS2 / Ni3S2 / NiFe-LDH / NF material, a synthesis method and application thereof. The method includes: taking nickel foam as the substrate and nickel source, firstly synthesizing a MoS2 / Ni3S2 / NF nanorod array under a 180-220DEG C hydrothermal condition, then introducing a nickel-iron double-layer hydroxide under a 120-160DEG C hydrothermal condition, thus finally forming the lamellar micron flower-like MoS2 / Ni3S2 / NiFe-LDH / NF material. The target product prepared according to the invention has good catalytic properties in the anodic urea oxidation reaction and cathodic hydrogen evolution reaction in an alkaline solution, and shows good bifunctional catalytic activity. At the same time, in an alkaline double-electrode electrolytic tank systemcontaining urea, only a 1.408V (vs.RHE) tank pressure is needed for reaching an electric current density of 100mA cm<-2>, and is far lower than that of a precious metal double-electrode system in an alkaline electrolyte solution. Therefore, the material is expected to replace precious metals for application in efficient urea oxygenolysis and electrocatalytic hydrogen evolution.

Description

technical field [0001] The invention relates to the technical field of synthesis and application of electrocatalytic materials, in particular to a flake micron flower-like MoS 2 / Ni 3 S 2 / NiFe-LDH / NF material and its synthesis method and application. Background technique [0002] Hydrogen production by electrolysis of water is a simple and effective way to obtain hydrogen and oxygen. The electrolysis of water consists of two half-reactions, the cathode hydrogen evolution reaction (Hydrogen Evolution Reaction, HER) and the anode oxygen evolution reaction (Oxygen Evolution Reaction, OER), and the theoretical decomposition voltage is 1.23v. However, during the anodic reaction, OER involving the transfer of four electrons to form an O–O bond is a kinetically slow process, and the actual potential is much larger than 1.23 V. Using an anodic reaction with a lower theoretical potential, such as urea oxidation reaction (UOR), to replace the slow OER can achieve more efficient h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C25B11/06C25B1/04
CPCB01J27/0515C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 吴慧敏贺茂晓冯传启王石泉张燕青
Owner HUBEI UNIV
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