cuh catalyst, cuh derived catalyst, preparation method and application

A technology for catalysts and reaction products, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of unsuitability for large-scale production, poor product selectivity, complex preparation methods, etc. The effect of reducing activity performance, excellent catalytic stability, and simple preparation method

Active Publication Date: 2022-07-22
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cu-based catalysts are currently the only ones capable of electrocatalyzing CO 2 Restore Production C 2 h 4 However, there are currently many problems such as complex preparation methods, unsuitable for large-scale production, poor product selectivity, low catalytic activity, and poor catalytic stability.
Although the size and morphology control, oxidation state control and other methods have improved the CO2 to a certain extent. 2 Restore Production C 2 h 4 selectivity, but still failed to achieve stable C at industrial level current 2 h 4 Production

Method used

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  • cuh catalyst, cuh derived catalyst, preparation method and application
  • cuh catalyst, cuh derived catalyst, preparation method and application
  • cuh catalyst, cuh derived catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] To prepare CuH catalyst and CuH derivatized catalyst, the specific steps are as follows:

[0062] Accurately weigh 10.871 g of borane tert-butylamine (86.97 g / mol) into a 50 mL beaker, then add ethanol to dissolve and dilute to a 50 mL volumetric flask to obtain a 2.5M borane tert-butylamine solution.

[0063] Accurately weigh 134.5 mg of anhydrous CuCl 2 (134.5g / mol) was added into a 500mL beaker, and then 200mL of ethanol was weighed and added, and placed in a 100W ultrasonic machine to dissolve at a constant temperature of 25°C and ultrasonically dissolved to form dissolved CuCl 2 solution.

[0064] Quantitatively take 2.5mL of the borane tert-butylamine solution and add the dissolved CuCl 2 In the solution, the ultrasonic reaction was maintained at a constant temperature for 2h.

[0065] The above-reacted suspension was separated by suction filtration, and the obtained solid was dispersed and washed with 300 mL of ethanol in three times. Then, the obtained produ...

Embodiment 2

[0078] Accurately weigh 20 mg of Cu derivatized with CuH catalyst in Example 1 2 O / CuO mixed crystal phase catalyst, quantitatively pipet 0.96mL of ethanol and 0.04mL of Nafion solution (5wt.%), placed in a 100W ultrasonic machine, and ultrasonically dispersed for 60min. The CuH derivatized catalyst was drop-coated on the gas diffusion electrode substrate by drop-coating, and dried naturally to form a catalytic layer, with an effective catalytic area of ​​1 cm. 2 , the catalyst loading is 1 mgcm -2 . Wherein, the intermediate layer of the gas diffusion electrode substrate is supported by carbon paper treated with 20wt.% PTFE as the gas diffusion layer, and the CuH derivatized catalyst is drop-coated on one side of the intermediate layer as the catalytic layer. The other side of the middle layer is brushed with a PTFE hydrophobic layer or adhered to a PTFE polymer film. A flow electrolyzer is used, the cathode and anode chambers are separated by AT-1 anion exchange membrane ...

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Abstract

The present invention provides a CuH catalyst, a CuH-derived catalyst, a preparation method and an application. The CuH catalyst is prepared by a liquid-phase chemical method using a borane complex or the like as a reducing agent. Preparation of CuH catalyst with uniform particle size distribution and relatively pure crystal, the preparation method is simple, and suitable for large-scale production; the prepared CuH catalyst has a rough active surface, and can spontaneously derivatize into a series of different Cu-based crystal phases in air or oxygen The catalyst has a simple process and does not require complicated surface plasma treatment and heat treatment to control the crystal phase structure of Cu-based catalysts; Cu-based catalysts derived from CuH catalysts 2 O / CuO mixed crystalline phase catalysts exhibit excellent electrochemical CO 2 Restoration performance, C 2 H 4 Selectivity, multi-carbon product selectivity, and industrial-level current density electrolysis and catalytic stability can be realized; the present invention can realize Cu-based catalyst electrocatalytic CO 2 Reduction to prepare C 2 H 4 wait C 2+ Industrial application of chemicals.

Description

technical field [0001] The invention belongs to the field of industrial electrocatalysis, and relates to a CuH catalyst, a CuH derivative catalyst, a preparation method and an application. Background technique [0002] Electrochemical CO 2 Reduction can take advantage of renewable and surplus power resources to convert CO 2 Converting into high-value fuels and chemicals has become a potential energy conversion and storage technology. At the same time, it is expected to achieve a zero-emission carbon cycle in the future and effectively alleviate the greenhouse effect, which has important practical significance. Among them, C 2 H 4 as a CO 2 Electrochemical reduction products, whose production industry is the core of the petrochemical industry, in recent years, electrochemical CO 2 Reduction to prepare C 2 H 4 It has attracted much attention as a clean and efficient technology. [0003] Cu-based catalysts are currently the only catalysts capable of electrocatalyzing CO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J35/00B01J35/02B01J37/16C25B3/03C25B11/091
CPCB01J23/72B01J35/023B01J35/0033B01J37/16C25B3/25C25B11/051C25B11/091
Inventor 杨辉马路山邹亮亮胡维波邹志青
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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