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Preparation method of CuOx/CeO2 catalyst with high CO-PROX activity

A catalyst and active technology, which is applied in the field of preparation of CuOx/CeO2 catalyst, can solve the problems that have not yet been seen, and achieve the effects of avoiding the loss of active species, high catalytic activity at low temperature and good selectivity

Inactive Publication Date: 2012-09-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has not been seen to use Cu(Ac)2·H 2 O as a precursor, CuOx / CeO with high activity and selectivity under the same conditions was prepared by a simple milling method 2 catalyst

Method used

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  • Preparation method of CuOx/CeO2 catalyst with high CO-PROX activity
  • Preparation method of CuOx/CeO2 catalyst with high CO-PROX activity
  • Preparation method of CuOx/CeO2 catalyst with high CO-PROX activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1. CuCe-200

[0024] Accurately weigh 0.4046g copper acetate monohydrate and 2.000g CeO 2 , mixed in a mortar, and uniformly ground for 30 minutes until the copper acetate and the carrier CeO 2 Mix well and evenly, dry in a vacuum desiccator at 60°C for 12h, in a tube furnace, N 2 The flow rate is 100ml / min, the heating rate is 5°C / min, the temperature rises to 200°C, N 2 The CuCe-200 sample was calcined under the atmosphere for 3h, and the Cu content was 6wt%. The wide-angle XRD result, H 2 -TPR, CO-PROX reactivity and selectivity as attached Figure 1-4 shown.

Embodiment 2

[0025] Example 2. CuCe-250

[0026] Accurately weigh 0.4046g copper acetate monohydrate and 2.000g CeO 2 , mixed in a mortar, and uniformly ground for 30 minutes until the copper acetate and the carrier CeO 2 Mix well and evenly, dry in a vacuum desiccator at 60°C for 12h, in a tube furnace, N 2 The flow rate is 100ml / min, the heating rate is 5°C / min, the temperature is raised to 250°C, and the temperature is kept at N 2 The CuCe-250 sample was calcined under the atmosphere for 3h, wherein the Cu content was 6wt%, and its wide-angle XRD result, H 2 -TPR, CO-PROX reactivity and selectivity as attached Figure 1-4 shown.

Embodiment 3

[0027] Example 3. CuCe-300

[0028] Accurately weigh 0.4046g copper acetate monohydrate and 2.000g CeO 2 , mixed in a mortar, and uniformly ground for 30 minutes until the copper acetate and the carrier CeO 2 Mix well and evenly, dry in a vacuum desiccator at 60°C for 12h, in a tube furnace, N 2 The flow rate is 100ml / min, the heating rate is 5°C / min, the temperature is raised to 300°C, and the temperature is kept at N 2 The CuCe-300 sample was calcined under the atmosphere for 3h, and the Cu content was 6wt%. The wide-angle XRD result, H 2 -TPR, CO-PROX reactivity and selectivity as attached Figure 1-4 shown.

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Abstract

The invention relates to a preparation method of a CuOx / CeO2 catalyst with high CO-PROX activity and various Cu species. Copper acetate and CeO2 carrier are placed into a mortar, are ground for certain time and are calcined for 3 hours respectively at the temperature of 200-400 DEG C in the N2 atmosphere, and thus the CuOx / CeO2 catalyst with various Cu species can be prepared. The preparation method has the advantages that no solvent is needed in the preparation process, and the loss of active species and the resulting pollution of water environment can be avoided effectively. More importantly, the catalyst has high CO-PROX activity and selectivity, the base metal Cu which can be easily obtained is used as an active ingredient, and high activity comparable with the activity of noble metal can be achieved.

Description

technical field [0001] The present invention relates to a class of CuOx / CeO with high CO-PROX activity 2 Catalyst preparation method. [0002] Background technique [0003] Fuel cell is a new type of power generation device that uses hydrogen as fuel. Its power generation efficiency is much higher than that of the corresponding internal combustion engine, and water is the only product of the reaction, which effectively avoids environmental pollution. It is a clean energy in the true sense. As the fuel for proton exchange membrane fuel cells, the source of hydrogen is mainly obtained through the reforming of hydrocarbons and alcohols. Due to the advantages of rich sources of methanol, low price, and safe transportation and storage, it has been widely used as a raw material for hydrogen production. broad attention. However, a small amount of CO in methanol reformed gas can easily lead to electrode poisoning during the operation of the fuel cell, so H must be 2 The CO cont...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J37/00B01D53/86B01D53/62
Inventor 董林吴肖霞余强高飞汤常金戴越
Owner NANJING UNIV
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