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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 low product selectivity and poor stability, Achieve good nanostructure, improve product selectivity, inhibit the formation of ethylene and the competition effect of hydrogen evolution

Active Publication Date: 2019-12-13
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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  • Preparation method and application of nanometer Cu-Bi alloy catalyst
  • Preparation method and application of nanometer Cu-Bi alloy catalyst
  • Preparation method and application of nanometer Cu-Bi alloy catalyst

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Experimental program
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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

The invention discloses a preparation method and an application of a nanometer Cu-Bi alloy catalyst, and concretely relates to a preparation method and an application of a Cu-Bi nano-alloy material. The purpose of the invention is to solve the problems of high overpotential, low product selectivity and poor stability in existing Cu catalytic reduction of CO2. The preparation method comprises the following steps: 1, preparation of a precursor salt solution; 2, reduction; and 3, separating, cleaning and drying for obtaining the nanometer Cu-Bi alloy catalyst. The nanometer Cu-Bi alloy catalyst is used as a raw material for preparing a working electrode, and the working electrode can be used for preparing CH4 by electrocatalytic reduction of CO2. The nanometer Cu-Bi alloy catalyst has the advantages of excellent physical and chemical properties and stability, realization of effective improvement of the CH4 product selectivity and inhibition of ethylene generation and hydrogen evolution competition by adding Bi, and low overpotential during electrocatalytic reduction of CO2 to prepare CH4.

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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IPC IPC(8): B01J23/843C25B3/04C25B11/04C25B3/25
CPCB01J23/8437C25B3/25C25B11/091B01J35/33
Inventor 王志江单晶晶
Owner HARBIN INST OF TECH
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