Preparation method and application of high-loading-capacity transition metal monatomic carbon-based catalyst

A technology based on carbon-based catalysts and transition metals, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of high cost and complicated process, and achieve the effect of strong reactivity

Active Publication Date: 2022-02-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current preparation of single-atom active sites still has the disadvantages of complicated procedures and high costs.

Method used

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  • Preparation method and application of high-loading-capacity transition metal monatomic carbon-based catalyst
  • Preparation method and application of high-loading-capacity transition metal monatomic carbon-based catalyst
  • Preparation method and application of high-loading-capacity transition metal monatomic carbon-based catalyst

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Effect test

Embodiment 1

[0047] 1. Preparation of carbon-based catalyst supported by iron single atom: on the basis of synthesizing zinc oxide exposed to a special crystal plane (non-polar plane (1010)) supported by single atom iron, and 2-methylimidazole in an argon atmosphere In the high-temperature reaction in a tube furnace, the final catalyst is obtained in one step. Specifically:

[0048] (1) Weigh 0.407 g of iron-loaded zinc oxide and 0.977 g of 2-methylimidazole, and place them in a corundum boat with a cover of 2 cm*2 cm*10 cm, wherein the iron-loaded zinc oxide is placed in the middle of the corundum boat , corresponding to the downwind direction of the carrier gas; 2-methylimidazole is placed on the head of the corundum boat, corresponding to the upwind direction of the carrier gas.

[0049] (2) Put the corundum boat into the middle of a 4 cm*3mm*60cm quartz tube, then place the quartz tube in the tube furnace quartz tube, and place corundum plugs at both ends so that the corundum boat cor...

Embodiment 2

[0065] 1. Preparation of cobalt single-atom-supported carbon-based catalysts: On the basis of synthesizing single-atom cobalt-supported non-polar surface-exposed zinc oxide, and 2-methylimidazole in argon atmosphere in a tube furnace at high temperature reaction, the final catalyst is obtained in one step. Specifically:

[0066] (1) Weigh 0.407 g of cobalt-loaded zinc oxide and 0.977 g of 2-methylimidazole, and place them in a corundum boat with a cover of 2 cm*2 cm*10 cm, wherein the cobalt-loaded zinc oxide is placed in the middle of the corundum boat , corresponding to the downwind direction of the carrier gas; 2-methylimidazole is placed on the head of the corundum boat, corresponding to the upwind direction of the carrier gas.

[0067] (2) Put the corundum boat into the middle of a 4 cm*3mm*60cm quartz tube, then place the quartz tube in the tube furnace quartz tube, and place corundum plugs at both ends so that the corundum boat corresponds to the thermocouple position ...

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Abstract

The invention discloses a preparation method and application of a high-loading-capacity transition metal monatomic carbon-based catalyst, and belongs to the field of new materials. With iron load as an example, zinc oxide with exposed special crystal faces is synthesized through a hydrothermal synthesis method, and then the zinc oxide and a ferric nitrate solution with a certain concentration are subjected to dipping treatment to obtain an iron-containing zinc oxide template. The template and 2-methylimidazole are subjected to a high-temperature reaction according to a certain proportion, and the carbon-based catalyst is obtained. The carbon-based catalyst can be applied to electrocatalytic reduction of carbon dioxide to prepare carbon monoxide. The exposed special crystal face of the zinc oxide template is controlled by adjusting the hydrothermal condition, dispersion of iron atoms in the dipping process can be effectively controlled, the reaction rate of zinc oxide and 2-methylimidazole at high temperature can be increased, and monoatomic state dispersion of the iron atoms on a carbon base is facilitated. The obtained carbon-based catalyst can realize directional catalytic reduction of carbon dioxide under low voltage, and shows excellent selectivity and stability.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a preparation method of a transition metal single-atom carbon-based catalyst and its application for directional catalytic reduction of carbon dioxide. Background technique [0002] The development of industry and population growth in the 21st century has led to the massive use of fossil fuels such as coal, oil and natural gas and related industrial products, resulting in the continuous accumulation of carbon dioxide in the atmosphere, which has caused serious problems in the environment and climate, known as "The Global Warming Effect". Abundant, cheap and easy-to-obtain CO 2 Converting to other energy sources that can be directly used has become a widely discussed solution [1-2] . Electrochemical carbon dioxide reduction reaction not only effectively utilizes clean energy such as solar energy and wind energy, but also can directly convert carbon dioxide into industri...

Claims

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Application Information

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IPC IPC(8): C25B11/075C25B11/054C25B11/065C25B1/23
CPCC25B11/075C25B11/054C25B11/065C25B1/23
Inventor 杨彬刘华龙雷乐成
Owner ZHEJIANG UNIV
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