Preparation method and application of silver-doped copper nanosheet catalyst

Abstract

The invention provides a preparation method and application of a silver-doped copper nanosheet catalyst. According to the catalyst, carbon paper serves as a carrier, and the silver-doped copper nanosheet catalyst is prepared through an electrochemical deposition method; the corrugated Cu nanosheet obtained through electro-deposition provides a relatively high active area for reaction, and a relatively large number of active sites are exposed, so electron transfer is facilitated; trace Ag atoms doped into the copper nanosheet and Cu atoms around the trace Ag atoms have a synergistic effect to play a main catalytic role, so adsorption and desorption of nitrogen are facilitated; and the addition of the organic molecule 3,5-diamino-1,2,4-triazole as a surfactant is beneficial to the control of the morphology of the catalyst obtained by deposition. The obtained catalyst is good in morphology, high in ammonia yield, good in stability and high in selectivity, the Faraday efficiency can of the cataly exceed s 20%, and the catalyst shows excellent catalytic performance. The preparation method is simple in process, low in cost and high in repeatability, provides a new way for efficient electrochemical synthesis of ammonia, and has wide application prospects.

Description

Technical field: [0001] The invention relates to a preparation method of a silver-doped copper nanosheet catalyst and its application as a catalyst in electrocatalytic nitrogen reduction synthesis ammonia reaction. Background technique: [0002] The excessive exploitation and consumption of fossil energy has caused the world's energy shortage. At the same time, the environmental pollution and greenhouse effect caused by the burning of fossil energy have prompted people to look for sustainable, clean and renewable energy. Ammonia is produced globally at more than 145 million tons per year and is an important component of the global economy. At the same time, the ammonia economy is also a key link in my country's industrial production and national economic development. As an efficient and carbon-free energy carrier, ammonia plays an important role in the production of fertilizers, fuels, and pharmaceuticals. In addition, ammonia has a hydrogen content as high as 17.6 and is...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of low catalytic yield, low Faradaic efficiency, and low selectivity of the catalyst due to the hydrogen evolution reaction of the competing reaction of the existing nitrogen reduction catalysts, the present invention provides a high-efficiency electrochemical process using electrodeposition. Preparation method and application of silver-doped copper nanosheet catalyst for nitrogen reduction synthesis of ammonia

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