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Silver selenide nano-catalyst as well as preparation method and application thereof

A nano-catalyst, silver selenide technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of low selectivity and poor stability of reduced carbon dioxide products, achieve excellent electrocatalytic carbon dioxide catalytic performance, low production cost, and achieve The effect of controlled preparation

Active Publication Date: 2022-03-25
RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of silver selenide nano-catalyst and its preparation method and application, by the silver-based catalyst Study on phase-dependent catalytic behavior, and use structural properties to obtain highly efficient silver-based electrocatalysts to solve the technical problems of low selectivity and poor stability of the existing electrocatalytic reduction of carbon dioxide products

Method used

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  • Silver selenide nano-catalyst as well as preparation method and application thereof
  • Silver selenide nano-catalyst as well as preparation method and application thereof
  • Silver selenide nano-catalyst as well as preparation method and application thereof

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Embodiment 1

[0040] A preparation method of silver selenide nano catalyst, comprising the following steps:

[0041] Step 1: Using high temperature pyrolysis method, 1mmol AgNO 3 , 0.5mmol selenium powder, 10mmol hexadecylamine and 1mL oleylamine were stirred and mixed evenly at room temperature to obtain a mixed solution; wherein AgNO 3 The concentration in the mixed solution is 0.25mmol / mL;

[0042] Step 2: Stir the mixed solution under a nitrogen atmosphere to heat up to the end of the reaction, then cool to room temperature, and centrifuge at a speed of 7000rpm for 5min to obtain a precipitate;

[0043] Step 3: wash the precipitate twice with deionized water and once with absolute ethanol, and then anneal at 400° C. for 3 hours to obtain a silver selenide nanocatalyst with a specific crystal plane orientation.

[0044] figure 1 Shown is the X-ray diffraction spectrum of the silver selenide nanocatalyst that embodiment 1 prepares, from the X-ray diffraction spectrum of product as can ...

Embodiment 2

[0050] According to the method for embodiment 1, difference is that metal silver salt used in step (1) is silver chloride, and all the other are identical with embodiment 1, obtain a kind of silver selenide nano-catalyst.

Embodiment 3

[0052] According to the method for embodiment 1, difference is that metal silver salt used in step (1) is silver sulfate, and all the other are identical with embodiment 1, obtain a kind of silver selenide nano-catalyst.

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Abstract

The invention discloses a silver selenide nano-catalyst as well as a preparation method and application thereof, belongs to the technical field of new energy materials and electrochemical catalysis, and solves the technical problems of low selectivity and poor stability when a carbon dioxide product is subjected to electrocatalytic reduction in the prior art. When the silver selenide nano-catalyst disclosed by the invention is used for electrocatalytic reduction of carbon dioxide, the highest Faraday efficiency of generating carbon monoxide can reach 98.1%, the sustainable electrolysis time is long, and the silver selenide nano-catalyst has an excellent carbon dioxide electrocatalytic effect; meanwhile, the invention discloses a preparation method of the silver selenide nano-catalyst, according to the method, a silver-based catalyst is prepared through a simple experiment, and the silver-based catalyst has high catalytic activity and product selectivity in electrocatalytic carbon dioxide reduction; the preparation method is simple to operate and easy to implement, and the prepared silver selenide nano-catalyst has excellent carbon dioxide reduction performance.

Description

technical field [0001] The invention belongs to the technical field of new energy materials and electrochemical catalysis, and in particular relates to a silver selenide nano-catalyst and its preparation method and application. Background technique [0002] Global warming and energy crisis are two major challenges facing human society. Atmospheric CO 2 Concentrations of carbon dioxide continue to rise, triggering the "greenhouse effect", which greatly endangers the environment on which we live. reduce CO 2 Emissions, efficient use of CO 2 , building an environment-friendly, energy-saving low-carbon economy has become a hot spot of extensive research at home and abroad. CO 2 as a C 1 resources, if it can be reduced to synthesize various chemicals and fuels (hydrocarbons, alcohols, etc.), both CO 2 The effective reduction of emissions can also be obtained as a reusable resource, which further promotes the deep integration of technological innovation and economic and soc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/042C25B1/23
CPCC25B11/042C25B1/23
Inventor 马对谢科予金婷沈超
Owner RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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