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Preparation method of nano mesoporous gold film loaded copper oxide cluster material and application of nano mesoporous gold film loaded copper oxide cluster material in preparation of ethanol

A technology of copper oxide and mesoporous gold, which is applied in metal material coating process, liquid chemical plating, ion implantation plating, etc., can solve the problems of low catalyst activity and poor product selectivity, so as to reduce the activation energy barrier, The effect of promoting reactivity and increasing reaction temperature

Active Publication Date: 2022-04-01
BEIJING UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006]For the existing electrocatalytic CO2 reduction (CO2RR) catalyst with low activity and poor product selectivity Problem, the present invention constructs a nanometer mesoporous gold film loaded copper oxide cluster material on a conductive glass substrate by electron beam evaporation technology and circulating liquid phase chemical copper plating method for highly selective electrocatalytic reduction of carbon dioxide to produce ethanol. Gold's plasmonic effect lowers the activation barrier for carbon dioxide reduction and promotes reactivity towards multi-carbon products

Method used

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  • Preparation method of nano mesoporous gold film loaded copper oxide cluster material and application of nano mesoporous gold film loaded copper oxide cluster material in preparation of ethanol
  • Preparation method of nano mesoporous gold film loaded copper oxide cluster material and application of nano mesoporous gold film loaded copper oxide cluster material in preparation of ethanol
  • Preparation method of nano mesoporous gold film loaded copper oxide cluster material and application of nano mesoporous gold film loaded copper oxide cluster material in preparation of ethanol

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Embodiment 1

[0025] Au / Ag double-layer films with a thickness of 5nm Au / 20nm Ag were deposited on the ITO substrate by electron beam evaporation technology, and a heat treatment was carried out at 900 °C for 15 minutes in an argon atmosphere to induce dehumidification. Then, the dehumidified Au-Ag alloy particles on the substrate were immersed in nitric acid solution (65 wt% HNO 3 solution) to remove Ag, and carry out dealloying treatment; the nanometer mesoporous gold thin film material (NP-Au) is prepared, and the physical map and different magnifications are observed in the scanning electron microscope to obtain figure 2 ( figure 2 ), with a good mesoporous structure.

Embodiment 2

[0027] The preparation process is the same as in Example 1, the only difference is that the concentration is 10mM hydrazine hydrate solution and 5mM copper acetate solution, respectively as a reducing agent and a copper precursor: then soak the NP-Au sample prepared in Example 1 in a hydration solution at room temperature Hydrazine solution for 30 minutes, the reducing agent is adsorbed by capillary effect, and then rinsed with deionized water to remove excess hydrazine hydrate solution on the surface. Then, soak the nanometer mesoporous gold film electrode adsorbed with hydrazine hydrate in copper acetate solution at room temperature for 30min, so that Cu 2+ After reduction, it was washed with deionized water again, so that the copper oxide clusters were supported on the nano-mesoporous gold film sample, and finally dried in a vacuum oven at 100°C for 2 hours. Prepared to get NP-Au-CuO X The -1C electrode material has no obvious difference from the microstructure of NP-Au ob...

Embodiment 3

[0029] The preparation process is the same as in Example 2, the only difference is that the NP-Au sample is soaked in hydrazine hydrate solution for 3 times and washed, and then soaked in copper acetate solution at room temperature for 30 minutes to increase the loading capacity of copper oxide clusters. NP-Au-CuO X -3C.

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Abstract

The invention discloses a preparation method of a nano mesoporous gold film loaded copper oxide cluster material and application of the nano mesoporous gold film loaded copper oxide cluster material in preparation of ethanol. An Au / Ag double-layer film is firstly deposited on an ITO substrate by adopting an electron beam evaporation technology, and the nano mesoporous gold film is prepared through induced dehumidification and dealloying processes. And filling copper into the nano mesoporous structure through a circulating liquid-phase chemical copper plating method to form the nano mesoporous gold film loaded copper oxide cluster material. The nano mesoporous gold film loaded copper oxide cluster material is synthesized by a simple, rapid, safe and controllable circulating liquid phase chemical copper plating method, the specific surface area of the material is increased, the catalytic activity is improved, the activation energy barrier of carbon dioxide reduction is reduced by virtue of the plasmon effect of gold, the reaction activity on a multi-carbon product is greatly promoted, and the catalytic activity of the material is improved. According to the invention, direct scientific basis and technical means are provided for designing and constructing a stable and efficient electrocatalytic oxygen evolution active material.

Description

technical field [0001] The invention belongs to the field of energy conversion and storage applications, and in particular relates to a preparation method of a nanometer mesoporous gold film-loaded copper oxide cluster material and its application in high-selectivity electrocatalytic reduction of carbon dioxide to produce ethanol. Background technique [0002] While burning fossil fuels for energy for human use, it also continuously releases a large amount of CO into the atmosphere 2 . Studies have shown that CO 2 Is the main greenhouse gas, the continuous growth of the earth's population and the large-scale use of fossil energy will inevitably make the CO in the atmosphere 2 Concentrations continue to rise, and the increasingly prominent issue of climate change is also restricting human economic and social development. will CO 2 Transforming into other substances for reuse is an effective way to solve the problem of carbon emissions. [0003] Carbon dioxide electrocata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B3/26C25B3/07C25B11/031C23C14/30C23C14/18C23C14/58C23C18/16C23F1/44
Inventor 严勇刘浩岑赵玉国
Owner BEIJING UNIV OF TECH
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