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lamellar micro flower-like mos 2 /ni 3 the s 2 /nife-ldh/nf material and its synthesis method and application

A synthesis method and lamellar technology are applied in the synthesis and application fields of electrocatalytic materials, which can solve the problems of high-cost industrial production of noble metal-based catalysts, and achieve good bifunctional catalytic activity, good application prospects, high catalytic activity and stability. Effect

Active Publication Date: 2022-03-18
HUBEI UNIV
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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 micro flower-like mos <sub>2</sub> /ni <sub>3</sub> the s <sub>2</sub> /nife-ldh/nf material and its synthesis method and application
  • lamellar micro flower-like mos <sub>2</sub> /ni <sub>3</sub> the s <sub>2</sub> /nife-ldh/nf material and its synthesis method and application
  • lamellar micro flower-like mos <sub>2</sub> /ni <sub>3</sub> the s <sub>2</sub> /nife-ldh/nf material and its synthesis method and application

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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 the reaction kettle, then adding the pretreated nickel foam in the solution in step (1), the reaction kettle 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...

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Abstract

In the present invention, nickel foam is used as the substrate and nickel source, and MoS is first synthesized under hydrothermal conditions of 180-220°C 2 / Ni 3 S 2 / NF nanorod array, and then introduce nickel-iron double-layer hydroxide under hydrothermal conditions at 120-160 °C, and finally form a sheet-like micro-flower-like MoS 2 / Ni 3 S 2 / NiFe‑LDH / NF material. The target product prepared by the present invention has good catalytic properties in the urea oxidation reaction of the anode and the hydrogen evolution reaction of the cathode in the alkaline solution, and exhibits good bifunctional catalytic activity. At the same time, in the alkaline double-electrode electrolytic cell system containing urea, it can reach 100mA cm ‑2 The current density only requires a cell voltage of 1.408V (vs RHE), which is far lower than that of the noble metal double-electrode system in alkaline electrolyte. Therefore, this material is expected to replace noble metals in the application of high-efficiency urea oxidative decomposition 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 Patents(China)
IPC IPC(8): C25B11/091C25B1/04
CPCB01J27/0515B01J35/0033C25B1/04C25B11/091Y02E60/36
Inventor 吴慧敏贺茂晓冯传启王石泉张燕青
Owner HUBEI UNIV
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