Micro-oxidized conductive carbon black supported nano metal bismuth catalyst and application thereof

Abstract

The invention belongs to the field of catalysis chemistry and relates to a micro-oxidized conductive carbon black supported nano metal bismuth catalyst and an application thereof. In the catalyst, firstly, micro-oxidized conductive carbon black is prepared with an improved Hammer's method and then added to ethylene glycol or glycerol and sufficiently dispersed, then, bismuth nitrate pentahydrate is added, the mixture is stirred, a mixed dispersion liquid is obtained, and finally, the catalyst is obtained after the reaction in an airtight autoclave. Through ingenious micro oxidation treatment of the conductive carbon black, rich oxygen-containing functional groups are introduced on the surface while the conductivity is guaranteed, micro-oxidized conductive carbon black supported metal bismuth nanoparticles with uniform sizes are synthesized with a one-step solvothermal method and have excellent activity of electro-catalytic synthesis ammonia.

Description

technical field [0001] The invention belongs to the field of catalytic chemistry, and relates to a micro-oxidized conductive carbon black-loaded nano-metal bismuth catalyst and its application. Background technique [0002] The electrocatalytic ammonia synthesis reaction can reduce nitrogen in the atmosphere to ammonia substances that can be absorbed by plants at normal temperature and pressure. This kind of reaction can use water as a proton source and be driven by electricity generated by clean energy, so it is more energy-saving and environmentally friendly than the traditional Haber method (high temperature and high pressure reaction), showing great academic research value and application prospects. [0003] However, the existing electrocatalytic ammonia synthesis catalysts all show very low ammonia synthesis selectivity (10%) and reaction rate, which makes these electrocatalytic systems lack real practical value. There are two main reasons for the low selectivity, ener...

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Problems solved by technology

[0003] However, the existing electrocatalytic ammonia synthesis catalysts all show very low ammonia synthesis selectivity (10%) and reaction rate, making these electrocatalytic systems lack real practical value

There are two main reasons for the low selectivity, energy efficiency and reaction rate of the existing electrochemical ammonia synthesis system: one is the low activation ability of nitrogen molecules in the existing catalysts, and the other is the strong competition of the hydrogen evolution reaction in the aqueous solution.

The methods reported so far cannot solve the above problems well, so it is impossible to achieve highly selective and efficient electrocatalytic synthesis of ammonia.

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