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Preparation of heteroatom-doped carbon material/Ni-MOF composite electrocatalyst

An electrocatalyst and heteroatom technology, which is applied in the field of preparation of heteroatom-doped carbon materials/Ni-MOF composite electrocatalysts, can solve the problems of high price and limited platinum storage capacity, and achieve improved activity, water electrolysis performance, The effect of improving the activity of electrolyzed water

Active Publication Date: 2019-01-11
CHANGZHOU UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the main HER and OER catalysts are platinum-based catalysts, but due to the limited actual storage capacity of platinum and the extremely high price, it is impossible to carry out large-scale commercial applications. Therefore, it is necessary to explore and find alternatives. Platinum has an excellent catalytic effect and an inexpensive catalyst has important practical significance

Method used

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  • Preparation of heteroatom-doped carbon material/Ni-MOF composite electrocatalyst
  • Preparation of heteroatom-doped carbon material/Ni-MOF composite electrocatalyst

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specific Embodiment approach 1

[0012] Embodiment 1: The preparation of a heteroatom-doped carbon material / Ni-MOF composite electrocatalyst of this embodiment is carried out according to the following steps:

[0013] (1) Weigh glucose and thiourea according to a certain molar ratio, add 4.5g of zinc chloride and place it in a beaker, add 16mL of deionized water, stir with a glass rod until dissolved, and place it in a hydrothermal reactor at a certain temperature to react for a certain period of time , ethanol, water repeated suction filtration washing, oven drying at 110°C, and then placed in a tube furnace under an inert atmosphere for carbonization at a certain temperature for a certain period of time to obtain a heteroatom-doped porous carbon material, marked as SNPC;

[0014] (2)C 4 h 6 NiO 4 4H 2 O and trimesic acid (H 3 BTC) was weighed according to a certain molar ratio, adding a certain amount of sulfur and nitrogen doped porous carbon material (SNPC), then adding 32mL DMF and 20mL ethanol, stir...

specific Embodiment approach 2

[0015] Embodiment 2: This embodiment differs from Embodiment 1 in that in step (1), glucose and thiourea are weighed in a molar ratio of 3:1, hydrothermally reacted at 140°C for 10 hours, and carbonized at 700°C for 2 hours. Others are the same as the first embodiment.

specific Embodiment approach 3

[0016] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step (2), it is weighed according to the molar ratio of 2:1, 5 mg of SNPC is added, and it is hydrothermally reacted at 180° C. for 10 h. Others are the same as those in Embodiment 1 or 2.

[0017] The preparation of a heteroatom-doped carbon material / Ni-MOF composite electrocatalyst is specifically illustrated by the following examples and comparative examples.

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Abstract

The invention especially relates to preparation of a heteroatom-doped carbon material / Ni-MOF composite electrocatalyst, belonging to the technical field of novel energy. According to the invention, the synergistic effect of co-doping of N and S elements is mainly utilized for changing the charge density of adjacent carbon atoms, which resulting in redistribution of the spin density of a matrix material; so rich active sites are formed in a prepared composite catalyst material, which is favorable for the progress of a catalytic reaction; and thus, the catalytic performance of a MOF-based material is improved. Glucose is used as a carbon source, thiourea is used as a sulfur source and nitrogen source, and zinc chloride is used as a structure-directing agent; a carbon material is preliminarily synthesized by using a hydrothermal method and then subjected to dezincification; and the dezincified carbon material is washed, then dried at 110 DEG C, and then subjected to high-temperature carbonization in a tubular furnace so as to obtain a sulfur-and-nitrogen-doped porous carbon (SNPC) material. The composite electrocatalyst (SNPC / Ni-MOF) of the heteroatom-doped carbon material and Ni-MOFis then prepared by using the hydrothermal method. Test results show that the composite electrocatalyst is obviously improved in the performance of electrolysis of water.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to the preparation of a heteroatom-doped carbon material / Ni-MOF composite electrocatalyst. Background technique [0002] Human beings have entered the 21st century, the level of civilization has been greatly improved, and human awareness of environmental protection is also increasing. However, how to realize the harmonious coexistence of man and nature and the sustainable development of the economy is still a big problem. At present, people still mainly use fossil fuels. Due to the rapid development of science and technology, the demand for energy is increasing day by day, which leads to the rapid depletion of available fossil fuels, and the human living environment has been greatly damaged, such as global warming, melting glaciers and rising sea levels. . It is considered that hydrogen energy is the most environmentally friendly energy source, mainly because when it is burned as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J31/2239B01J35/33Y02E60/36
Inventor 谢爱娟陶凤罗士平杜佳雯涂颖余祥浪熊志宸许成飞潘菲陶宇炜
Owner CHANGZHOU UNIV
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