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Catalyst for electrocatalytic reduction of nitrate as well as preparation method and application thereof

A nitrate, electrocatalysis technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high catalyst cost and low catalytic performance Ru, and achieve improved catalytic performance, high current The effect of density, preparation method and simple process

Pending Publication Date: 2021-01-19
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Other catalysts include Cu-based, Ti-based and Co-based catalysts, but the catalytic performance is lower than that of Ru
In addition, since Ru is a noble metal, there is also the problem of high catalyst cost.

Method used

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  • Catalyst for electrocatalytic reduction of nitrate as well as preparation method and application thereof
  • Catalyst for electrocatalytic reduction of nitrate as well as preparation method and application thereof
  • Catalyst for electrocatalytic reduction of nitrate as well as preparation method and application thereof

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Experimental program
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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0029] Such as Figure 1 to Figure 6 Shown, a kind of catalyst preparation method of electrocatalytic reduction of nitrate comprises the steps:

[0030] Using nickel foam as a substrate, a nickel oxide layer is formed on the surface of nickel foam to obtain a composite; using ruthenium trichloride solution, ruthenium nanoparticles are deposited on the composite by electrochemical cyclic voltammetry to obtain a Ni-Ru composite catalyst. Nickel foam is used as a substrate to provide a high electrochemically active surface area for electrochemical reactions; an oxide layer is introduced on the surface of nickel foam to effectively improve the catalytic performance of the catalyst for nitrate reduction.

[0031] In the step of using nickel foam as a substrate to form a nickel oxide layer on the su...

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PUM

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Abstract

The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a catalyst for electrocatalytic reduction of nitrate. The method comprises the followingsteps: by using foamed nickel as a substrate, forming a nickel oxide layer on the surface of the foamed nickel to obtain a compound; and depositing ruthenium nanoparticles on the compound by adoptinga ruthenium trichloride solution and adopting an electrochemical cyclic voltammetry to obtain the NiRu composite catalyst. According to the preparation method of the catalyst for electrocatalytic reduction of nitrate, the preparation method is simple in process, the catalyst load Ru amount is low, and the catalyst cost is low; the invention also provides an application of the catalyst for electrocatalytic reduction of nitrate. The catalyst has higher current density, higher current Faraday efficiency and higher nitrate elimination rate of synthetic ammonia in a wide voltage range.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst for electrocatalytic reduction of nitrate, a preparation method and application thereof. Background technique [0002] In the process of industrial production, most industries will directly or indirectly produce nitrate, such as: ammonia waste discharged from food, fuel refining and other factories, which will form nitrate after biological and chemical conversion; thermal power plants, automobiles, ships A large amount of nitrogen oxides produced in the combustion process are leached by precipitation to form nitrates; ammonium nitrate, calcium nitrate, potassium nitrate, sodium nitrate rich in artificial fertilizers and urea rich in textile industry fuels; acid in the electroplating industry Nitric acid produced during washing, stripping, etching and other processes. Nitrate is very soluble in water, and is relatively stable, and it is not easy to form co...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/08B01J37/14B01J37/34C25B1/27C25B11/031C25B11/061C25B11/053C25B11/091C23C8/12C25D3/50C02F1/461C02F101/16
CPCB01J23/892B01J37/08B01J37/14B01J37/348C25B1/00C23C8/12C25D3/50C02F1/4676C02F2101/163B01J35/23B01J35/33
Inventor 周凤玲孙成华李勤干
Owner DONGGUAN UNIV OF TECH
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