Electrocatalytic material for converting nitrogen gas into ammonia gas

Abstract

The invention belongs to the field of preparation of nano materials and nitrogen reduction, and relates to an electrocatalytic material for converting nitrogen gas into ammonia gas. Pure Ti3C2Tx MXeneis prepared by using a Ti3AlC2 precursor at first and then improved through a solvothermal mode, and finally, the use method and catalytic effect of pure Ti3C2Tx MXene are verified; it is found thatthe ammonia production amount of a Ti3C2Tx / TiO2 nano composite can reach 32.17 micrograms h<-1>mg<-1>cat. at -0.55V, the Faraday efficiency of the composite reaches 16.07% at -0.45V,but the ammonia production amount of pure Ti3C2Tx MXene only reaches 22.19 micrograms h<-1>mg<-1>cat. at -0.55V, the Faraday efficiency of the composite reaches 7.09% at -0.45V, the ammonia production amount and Faraday efficiency of the Ti3C2Tx / TiO2 nano composite are 11 times and 69 times those of TiO2 nano particles respectively, and the catalytic efficiency of the Ti3C2Tx / TiO2 nano composite is higher than that of most of the current electrocatalysts; it is shown that the Ti3C2Tx / TiO2 nano composite is a very good nitrogen reduction material, can be applied to the field of nitrogen reduction, is simple andeasy to operate, the raw materials are easy to obtain, and the preparation cost is low; the preparation efficiency is high, the quality of the prepared product is high, the stability is high, the application environment is good, and the market prospect is broad.

Description

Technical field:

[0001] The invention belongs to the field of preparation of nanomaterials and nitrogen reduction, and relates to an electrocatalytic material for converting nitrogen into ammonia. 3 AlC 2 MAX was used as raw material, and Ti was synthesized by HF etching and ethanol thermal method 3 C 2 T x MXene nanosheets and Ti0 2 Composite of nanoparticles without adding any substrate and titanium source. Background technique:

[0002] Ammonia is an indispensable industrial chemical that plays an important role in fields such as plastics, the textile industry, agriculture and food production. It is seen as a renewable energy-intensive fuel that can contribute to low-carbon or carbon-free processes globally. Therefore, the huge demand for ammonia has promoted the exploration of nitrogen fixation. Nitrogen fixation is to convert a large amount of nitrogen in the atmosphere into ammonia, but the field of nitrogen fixation is greatly limited due to the large bond ene...

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