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Preparation method and application of ZIF8-graphene-based rhodium-loaded aerogel catalyst

A graphene-based, ZIF-8 technology applied in the field of electrochemical materials to achieve high efficiency, high conductivity, and good anti-aging performance

Active Publication Date: 2020-12-08
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are relatively few studies on ZIF-8 / graphene nanosheet composite catalysts in the prior art. It has good anti-poisoning ability and catalytic activity, and it is a good choice to supplement platinum with it, and compared with platinum Catalysts have a lot of room for research

Method used

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  • Preparation method and application of ZIF8-graphene-based rhodium-loaded aerogel catalyst
  • Preparation method and application of ZIF8-graphene-based rhodium-loaded aerogel catalyst
  • Preparation method and application of ZIF8-graphene-based rhodium-loaded aerogel catalyst

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Experimental program
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Effect test

Embodiment 1

[0035] A kind of preparation method of the airgel catalyst of ZIF8-graphene base loaded rhodium, such as figure 1 shown, including the following steps:

[0036] (1) 0.03mmol of Zn(NO 3 ) 2 and 0.06mmol of dimethylimidazole were dissolved in 3mL of methanol solution, and ultrasonically dispersed for 30min to obtain Zn(NO 3 ) 2 Methanol solution and dimethylimidazole methanol solution (ZIF-8 source solution); 10 mL of graphene oxide solution with a concentration of 2 mg / mL was dissolved in 5 mL of methanol solution, and ultrasonically dispersed for 30 minutes to obtain graphene oxide methanol solution.

[0037] (2) Zn(NO 3 ) 2 The methanol solution and the dimethylimidazole methanol solution were respectively added to the graphene oxide methanol solution at the same time, kept at room temperature and mechanically stirred for 48 hours to obtain a ZIF-8 / GO solution.

[0038] (3) The ZIF-8 / GO solution was centrifuged and washed with methanol solution at a speed of 6000 rpm fo...

Embodiment 2

[0046] A kind of preparation method of the airgel catalyst of ZIF8-graphene base loaded rhodium, such as figure 1 shown, including the following steps:

[0047] (1) 0.06mmol of Zn(NO 3 ) 2 and 0.12mmol of dimethylimidazole were dissolved in 3mL of methanol solution, and ultrasonically dispersed for 30min to obtain Zn(NO 3 ) 2 Methanol solution and dimethylimidazole methanol solution (ZIF-8 source solution); 10 mL of graphene oxide solution with a concentration of 2 mg / mL was dissolved in 5 mL of methanol solution, and ultrasonically dispersed for 30 minutes to obtain graphene oxide methanol solution.

[0048] (2) Zn(NO 3 ) 2 The methanol solution and the dimethylimidazole methanol solution were respectively added to the graphene oxide methanol solution at the same time, kept at room temperature and mechanically stirred for 48 hours to obtain a ZIF-8 / GO solution.

[0049] (3) The ZIF-8 / GO solution was centrifuged and washed with methanol solution at a speed of 6000 rpm fo...

Embodiment 3

[0057] A kind of preparation method of the airgel catalyst of ZIF8-graphene base loaded rhodium, such as figure 1 shown, including the following steps:

[0058] (1) 0.3mmol of Zn(NO 3 ) 2 and 0.6mmol of dimethylimidazole were dissolved in 3mL of methanol solution, and ultrasonically dispersed for 30min to obtain Zn(NO 3 ) 2 Methanol solution and dimethylimidazole methanol solution (ZIF-8 source solution); 10 mL of graphene oxide solution with a concentration of 2 mg / mL was dissolved in 5 mL of methanol solution, and ultrasonically dispersed for 30 minutes to obtain graphene oxide methanol solution.

[0059] (2) Zn(NO 3 ) 2 The methanol solution and the dimethylimidazole methanol solution were respectively added to the graphene oxide methanol solution at the same time, kept at room temperature and mechanically stirred for 48 hours to obtain a ZIF-8 / GO solution.

[0060] (3) The ZIF-8 / GO solution was centrifuged and washed with methanol solution at a speed of 6000 rpm for ...

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Abstract

The invention discloses a preparation method and application of a ZIF8 graphene-based rhodium-loaded aerogel catalyst. The method comprises the following steps: diluting a graphene oxide solution in methanol to prepare a graphene oxide dispersion liquid, doping a ZIF8 source solution into a bottom template to grow ZIF8 in situ, and preparing a ZIF8 / GO solution through a normal temperature synthesis method. The ZIF8 / graphene rhodium-loaded aerogel is obtained by a soft chemical method. According to the preparation method, the ZIF8 is doped to introduce holes, so that the inherent micropore property of graphene is well improved, and a composite material has more active sites by taking a composite product of the graphene and the ZIF8 as a bottom template. The prepared ZIF8 / graphene-based rhodium-loaded aerogel has good electrocatalytic performance and stability, effectively utilizes the porous characteristic of the ZIF8 material, has the advantages of environmental friendliness, high resource utilization rate, good feasibility and the like, and is expected to be applied to the field of methanol fuel cells.

Description

technical field [0001] The invention belongs to the technical field of electrochemical materials, in particular to a preparation method and application of a ZIF8-graphene-based airgel catalyst loaded with rhodium. Background technique [0002] Our country is facing a serious energy crisis and environmental pollution. To develop the national economy and improve people's living standards, we must use energy reasonably. At the same time, innovation and breakthroughs in energy and technology are bound to have a huge impact on the development and transformation of productivity and society. So far, fossil fuels such as coal, oil, and natural gas are still the main energy sources for human survival. People's demand for energy is mainly through the heat engine, which converts the chemical energy of fossil fuels into other forms of energy. However, this energy conversion method is not only affected by the Carnot cycle, but also has low energy conversion efficiency and requires a hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/86
CPCH01M4/8673H01M4/921H01M4/926Y02E60/50
Inventor 何海燕杜协奥黄华杰陈语娴王国军李伟华
Owner HOHAI UNIV
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