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Trimetal-based Ni-Co-Zn-N co-doped porous carbon catalyst as well as preparation method and application thereof

A technology of co-doping and porous carbon, applied in electrical components, battery electrodes, circuits, etc.

Inactive Publication Date: 2020-12-25
GUANGXI NORMAL UNIV
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  • Application Information

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Problems solved by technology

However, nickel, cobalt doped zinc-based zeolitic imidazole framework (Ni-Co-ZIF-8) precursors were synthesized by coordination of nickel nitrate, cobalt nitrate, and zinc nitrate with 2-methylimidazole, followed by pyrolysis to prepare trimetallic Ni - Co-Zn-N co-doped porous carbon catalysts and their application in fuel cells and metal-air battery cathode oxygen reduction reactions have not yet been reported in literature and patents

Method used

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  • Trimetal-based Ni-Co-Zn-N co-doped porous carbon catalyst as well as preparation method and application thereof
  • Trimetal-based Ni-Co-Zn-N co-doped porous carbon catalyst as well as preparation method and application thereof
  • Trimetal-based Ni-Co-Zn-N co-doped porous carbon catalyst as well as preparation method and application thereof

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Embodiment

[0022] refer to figure 1 , a kind of preparation method of trimetallic base Ni-Co-Zn-N co-doped porous carbon catalyst, comprises the steps:

[0023]1) Add 5-30 mmol 2-methylimidazole to a container containing 35 mL of methanol, ultrasonically disperse evenly and add to 35 mL containing 0.05-1 mmol nickel nitrate, 0.05-1 mmol cobalt nitrate and 1-10 mmol zinc nitrate In the methanol solution, continue to sonicate for 10 minutes and then magnetically stir for 12 hours, centrifuge, wash, and dry to obtain a light purple nickel-cobalt doped zinc-based zeolite imidazole framework, that is, the Ni-Co-ZIF-8 precursor;

[0024] 2) Place the obtained precursor Ni-Co-ZIF-8 sample in a quartz tube furnace under N 2 The Ni-Co-Zn-N co-doped porous carbon catalyst, namely Ni-Co-Zn-N-PC, can be prepared by thermally decomposing at 600-1000° C. for 1-3 hours under protection.

[0025] Ni-Co-Zn-N co-doped porous carbon catalyst Ni-Co-Zn-N-PC prepared by the above preparation method.

[002...

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Abstract

The invention discloses a trimetal-based Ni-Co-Zn-N co-doped porous carbon catalyst as well as a preparation method and application thereof. According to the method, nickel nitrate, cobalt nitrate andzinc nitrate are used as transition metal sources and coordinated with 2-methylimidazole to synthesize a nickel-and-cobalt-doped zinc-based zeolite imidazole framework (Ni-Co-ZIF-8) precursor, and then the trimetal-based Ni-Co-Zn-N co-doped porous carbon catalyst can be prepared through pyrolysis. The method is simple in technological process, rich in raw material source and low in cost, and theprepared catalyst shows oxygen reduction reaction activity comparable to commercial Pt / C and better electrochemical stability and methanol resistance, and has a good application prospect in cathode oxygen reduction reaction of fuel cells and metal-air cells.

Description

technical field [0001] The invention relates to the fields of electrocatalysis, fuel cells and metal-air batteries, in particular to a trimetallic Ni-Co-Zn-N co-doped porous carbon catalyst, a preparation method and application thereof. Background technique [0002] Fuel cells and metal-air batteries stand out among many potential new energy technologies due to their advantages of environmental protection and high efficiency. However, the slow kinetics of the cathodic oxygen reduction reaction (ORR) is still a key factor restricting its commercial application. So far, noble metal materials such as Pt, Pd, and Ir have been considered as the most suitable ORR catalysts, but their large-scale application is limited by the disadvantages of high cost of noble metals, scarcity of raw materials, and poor stability. Therefore, the development of low-cost, high-performance and highly stable non-precious metal catalysts is one of the effective ways to solve the above problems. [00...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9041H01M4/9083Y02E60/50
Inventor 樊友军张琬卿容楚艳黄科薪陈卫
Owner GUANGXI NORMAL UNIV
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