Method of electrocatalysing nitrogen reduction catalyst

Abstract

The invention belongs to the technical field of electro-catalytic ammonia production, and discloses a method of electrocatalysing nitrogen reduction catalyst. The method comprises the following steps:firstly, introducing telluride into electro-catalytic nitrogen reduction by utilizing the hydrogen storage capacity of the telluride, selecting elements with favorable adsorption action on nitrogen,and realizing higher ammonia yield at 0V by virtue of the hydrogen storage property of the telluride, wherein the telluride is prepared from Sb2Te3, Bi3Te4, CoTe and CdTe2; taking Sb2Te3 as an example, the synthesis method of the Sb2Te3 comprises the following steps: SbCl3 is dissolved in water, then 25mg of sodium tartrate, 25mL of ammonia water, 22mg of potassium tellurite and 10mL of hydrazineare sequentially added and stirred for 5min, and the mixture is put into a reaction kettle to react at 180 DEG C for 5h; the nitrogen reduction properties of Sb2Te3, Bi3Te4, CoTe and CdTe are compared, and it is found that telluride has a great prospect in nitrogen reduction under low voltage.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic ammonia production, and in particular relates to an electrocatalytic nitrogen reduction catalyst method. Background technique [0002] Ammonia synthesis has always been one of the most important industrial processes, and its product ammonia is not only a widely used industrial product, but also an ideal clean energy carrier. The traditional synthesis of ammonia uses the Haber-Bosch method to promote the reaction of high-purity hydrogen and nitrogen to form ammonia through extreme conditions such as high temperature and high pressure. The process is energy-intensive and emits large amounts of greenhouse gases. It is not conducive to the current green and sustainable development strategy. [0003] Therefore, it is particularly important to develop green and sustainable alternatives. The current methods of producing ammonia include photocatalytic nitrogen reduction, electrocatalytic nitro...

AI Technical Summary

Problems solved by technology

[0008] (1) In the prior art, it is difficult for most catalysts to achieve high ammonia production at lower voltages

[0009] (2) At present, some catalysts can produce ammonia under low voltage, but they are all precious metals, which are expensive and have scarce reserves, which have certain limitations in industrial production

[0013] (2) Due to the low solubility of nitrogen, the strong hydrogen evolution competition reaction and the high energy barrier to be overcome in the hydrogenation reduction of nitrogen reduction, the speed is slow, so the catalytic effect of the current catalyst is mainly concentrated at high voltage, so a catalyst is designed to increase Nitrogen adsorption, inhibiting hydrogen evolution, accelerating reduction, and achieving high ammonia production at low voltage are very important

However, as a promising catalyst, its contribution in nitrogen reduction to ammonia production has not been studied

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