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A kind of preparation method and application of nanometer cu-bi alloy catalyst

An alloy catalyst, cu-bi technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of poor stability and low product selectivity, etc. Achieve good nanostructure, improve product selectivity, inhibit the formation of ethylene and the effect of competition for hydrogen evolution

Active Publication Date: 2022-03-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the invention is to solve the existing Cu catalytic reduction of CO 2 There are problems of low product selectivity and poor stability; and a preparation method and application of a nano-Cu-Bi alloy catalyst are provided

Method used

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  • A kind of preparation method and application of nanometer cu-bi alloy catalyst
  • A kind of preparation method and application of nanometer cu-bi alloy catalyst
  • A kind of preparation method and application of nanometer cu-bi alloy catalyst

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specific Embodiment approach 1

[0025] Specific embodiment one: this embodiment is a kind of preparation method of nano-Cu-Bi alloy catalyst, specifically completes according to the following steps:

[0026] 1. Preparation of precursor salt solution: dissolve the surfactant in an alcohol-containing organic solvent to obtain a surfactant-alcohol-containing organic solvent, and dissolve the copper salt and bismuth salt in the surfactant-alcohol-containing organic solvent under the protection of an inert gas. In the solvent, the precursor salt solution is obtained; the volume ratio of the amount of the surfactant to the alcohol-containing organic solvent is (0.002~2) mmol: 20mL; the copper element in the copper salt and the bismuth element in the bismuth salt The molar ratio is 1 to 9:1; the volume ratio of the sum of the amounts of copper in the copper salt and bismuth in the bismuth salt to the alcohol-containing organic solvent is (0.02 to 0.2) mmol: 20 mL;

[0027] 2. Reduction: Dissolve the reducing agent ...

specific Embodiment approach 2

[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the surfactant described in step one is sodium dodecylbenzenesulfonate, PVP K30 or CTAB (hexadecyl trimethyl bromide ammonium). Others are the same as the first embodiment.

[0033] PVP-K30 is one of polyvinylpyrrolidone products with a K value of 30.

specific Embodiment approach 3

[0034] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the alcohol-containing organic solvent described in step 1 is ethylene glycol or diethylene glycol. Others are the same as those in Embodiment 1 or 2.

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Abstract

A preparation method and application of a nano-Cu-Bi alloy catalyst, which relate to a preparation method and application of a Cu-Bi nano-alloy material. The purpose of the invention is to solve the existing Cu catalytic reduction of CO 2 There are problems of high overpotential, low product selectivity and poor stability. Preparation method: 1. Preparing precursor salt solution; 2. Reducing; 3. Separating, cleaning and drying to obtain nano Cu-Bi alloy catalyst. Nano-Cu-Bi alloy catalyst was used as raw material to prepare working electrode for electrocatalytic reduction of CO 2 CH 4 . Advantages: It has good physical and chemical properties and stability; the addition of Bi effectively improves the CH 4 product selectivity, while suppressing the competition of ethylene formation and hydrogen evolution; electrocatalytic reduction of CO 2 CH 4 When the overpotential is low.

Description

technical field [0001] The invention relates to a preparation method and application of a Cu-Bi nano alloy material. Background technique [0002] Human beings have always relied heavily on fossil fuels to meet their energy needs, and this dependence has led to various environmental problems such as global warming and energy crises. Among them, the excess CO 2 The impact of emissions on the climate is slowly but significantly affecting our production and life. Therefore, the possibility of utilizing carbon dioxide to synthesize chemical products has received much attention as a potential breakthrough for sustainable development. There are many ways to convert carbon dioxide, such as photocatalysis, catalytic hydrogenation, biomass conversion and electrocatalysis, etc. Electrochemical reduction of carbon dioxide to useful fuels has attracted research interest in recent years, as it is considered an important component of the carbon-neutral cycle by combining the storage of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/843C25B3/26C25B3/03C25B11/089C25B11/091
CPCB01J23/8437C25B3/25C25B11/091B01J35/33
Inventor 王志江单晶晶
Owner HARBIN INST OF TECH
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