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Supported porous N-doped carbon nanomaterial as well as preparation method and application thereof

A carbon nanomaterial, supported technology, applied in the field of supported porous N-doped carbon nanomaterials and their preparation, can solve problems such as poor performance of catalytic materials, achieve good catalytic effect of electrolyzed water, improve OER performance, and improve HER active effect

Active Publication Date: 2021-11-26
CHANGZHOU INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problems of poor HER and OER performance of existing catalytic materials, a supported porous N-doped carbon nanomaterial and its preparation method and application are provided

Method used

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  • Supported porous N-doped carbon nanomaterial as well as preparation method and application thereof
  • Supported porous N-doped carbon nanomaterial as well as preparation method and application thereof
  • Supported porous N-doped carbon nanomaterial as well as preparation method and application thereof

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Embodiment 1

[0031] The preparation of porous N-doped carbon nanomaterials loaded with NiCo nanoparticles by derivation from Ni-ZIF-8@ZIF-67 includes the following steps:

[0032] (1) Synthesis of ZIF-8

[0033] Weigh 1.65gZn(NO 3 ) 2 ·6H 2 O was dissolved in 50mL of methanol, 1.5g of 2-methylimidazole and 3.5g of polyvinylpyrrolidone were dissolved in another 50mL of methanol, the two were mixed uniformly, stirred at room temperature for 5min, left to stand for 23h, and the product was collected by centrifugation, washed with methanol for two The product was washed over, and then the product was placed in a vacuum oven at 60° C. for 12 hours to obtain ZIF-8. The role of PVP can make ZIF-8 attached to PVP to make it more uniform, and PVP is also a source of carbon source.

[0034] (2) Synthesis of Ni-ZIF-8

[0035] Weigh 0.05g of nickel acetylacetonate and dissolve it in 7.5mL of ethanol, add 0.25g of ZIF-8, stir at room temperature for 30min to generate an adsorption reaction, collec...

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Abstract

The invention relates to a supported porous N-doped carbon nanomaterial as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) synthesizing ZIF-8 by adopting a dispersing agent in the synthesis process; (2) subjecting the ZIF-8 and nickel salt to an adsorption reaction to obtain Ni-ZIF-8; (3) synthesizing the Ni-ZIF-8, a cobalt salt and 2-methylimidazole, so as to obtain Ni-ZIF-8@ZIF-67; and (4) calcining the Ni-ZIF-8@ZIF-67, and cooling to obtain the supported porous N-doped carbon nanomaterial. The matrix of the obtained nano material is a porous N-doped carbon material, and the configuration of the matrix is a polyhedral nano frame structure; particulate matters are loaded on the configuration surface of the base body, and the components of the particulate matters comprise NiCo nano alloy particles. The material is prepared by an MOF material derivation method, and is used for an electrolytic water catalytic material, and when the current density is 10mA.cm<-2>, the overpotential of the HER reaction is 98mV, and the overpotential of the OER reaction is 195mV.

Description

technical field [0001] The invention relates to the technical field of carbon nanomaterials, in particular to a supported porous N-doped carbon nanomaterial and its preparation method and application. Background technique [0002] The challenges of the energy crisis and global warming have prompted scientific exploration of the process of water splitting. Obtaining hydrogen through hydrogen evolution reaction (HER) in electrolyzed water is an efficient and environmentally friendly method, and hydrogen is considered to be one of the most promising energy sources to replace traditional fossil fuels due to its non-polluting combustion and high energy density. [0003] However, many electrocatalysts have high overpotentials and large Tafel slopes during water electrolysis for hydrogen evolution, which make them exhibit slow HER kinetics. And in the process of exploring water splitting, the kinetics of oxygen evolution reaction (OER) is hysteresis due to its complex four-electro...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04B82Y40/00
CPCC25B11/091C25B1/04B82Y40/00Y02E60/50
Inventor 庞佳政柏寄荣戴仁童邓瑶瑶葛文政
Owner CHANGZHOU INST OF TECH
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