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A regeneration device and regeneration method for eliminating the effect of air impurities on the poisoning of oxygen electrode electrocatalyst

An electrocatalyst and regeneration device technology, applied in the field of electrocatalysis, can solve the problems of high oxidation potential, realize the influence of catalyst stability, difficult detoxification conditions, etc., and achieve the effects of simple operation, elimination of poisoning influence, and easy portability.

Active Publication Date: 2022-06-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the oxidation potential is high, and the cyclic voltammetry scans to 1.5V, and it takes at least 8 cycles to remove all the sulfur-containing substances on the surface of the catalyst.
The detoxification conditions of high-potential oxidation are not only difficult to achieve, but also have a great impact on the stability of the catalyst.

Method used

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  • A regeneration device and regeneration method for eliminating the effect of air impurities on the poisoning of oxygen electrode electrocatalyst
  • A regeneration device and regeneration method for eliminating the effect of air impurities on the poisoning of oxygen electrode electrocatalyst
  • A regeneration device and regeneration method for eliminating the effect of air impurities on the poisoning of oxygen electrode electrocatalyst

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specific Embodiment approach 1

[0034] A regeneration method to eliminate the effect of air impurities on the toxicity of the oxygen electrode electrocatalyst, comprising the following steps:

[0035] Step 1, substitution adsorption: the poisoned oxygen electrode is placed in the containing NO x In an environment that utilizes NO x Replace the toxic substance on the surface of the electrocatalyst of the adsorbed oxygen electrode, said NO x The environment is liquid NO x Environment;

[0036] Step 2, electrochemical reduction: step 1 replace the adsorbed battery cathode into nitrogen, the anode into hydrogen, electrochemical reduction reaction, to complete the regeneration of the oxygen electrode electrocatalyst.

[0037] A regeneration method for eliminating the effect of air impurities on the toxicization of the oxygen electrode electrocatalyst described in the present embodiment, the oxygen electrode applied to the toxicity of the present embodiment is so 2 The cathode of the toxic proton exchange membrane fue...

specific Embodiment approach 2

[0045] A regeneration method to eliminate the effect of air impurities on the toxicity of the oxygen electrode electrocatalyst, comprising the following steps:

[0046] Step 1, substitution adsorption: the poisoned oxygen electrode is placed in the containing NO x In an environment that utilizes NO x Replace the toxic substance on the surface of the electrocatalyst of the adsorbed oxygen electrode, said NO x The environment is gaseous NO x Environment;

[0047] Step 2, electrochemical reduction: step 1 replace the adsorbed battery cathode into argon, the anode into hydrogen, electrochemical reduction reaction, to complete the regeneration of the oxygen electrode electrocatalyst.

[0048] A regeneration method for eliminating the effect of air impurities on the toxicity of the oxygen electrode electrocatalyst, the oxygen electrode applied to the toxicity of the present embodiment is H 2S Poisoned proton exchange membrane fuel cell cathode, cathode catalyst is PtCo / CNT.

[0049] A r...

specific Embodiment approach 3

[0053] A regeneration method to eliminate the effect of air impurities on the toxicity of the oxygen electrode electrocatalyst, comprising the following steps:

[0054] Step 1, substitution adsorption: the poisoned oxygen electrode is placed in the containing NO x In an environment that utilizes NO x Replace the toxic substance on the surface of the electrocatalyst of the adsorbed oxygen electrode, said NO x The environment is gaseous NO x Environment;

[0055]Step 2, electrochemical reduction: step 1 replace the adsorbed battery cathode into nitrogen, the anode into hydrogen, electrochemical reduction reaction, to complete the regeneration of the oxygen electrode electrocatalyst.

[0056] A regenerative method for eliminating the effect of air impurities on the toxicity of the oxygen electrode electrocatalyst described in the present embodiment, the oxygen electrode applied to the present embodiment after poisoning is Al has been Na 2 SO 3 The cathode of the toxic proton exchange...

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Abstract

The invention relates to a regeneration device and a regeneration method for eliminating the influence of air impurities on oxygen electrode electrocatalyst poisoning, belonging to the field of electrocatalysis. The technical problem to be solved by the invention is to alleviate and solve the poisoning of the oxygen electrode by the sulfur-containing substance in an efficient and non-destructive method. In the present invention, the poisoned oxygen electrode is placed in the x environment, the use of NO x To replace the poisoning substances on the surface of the electrocatalyst that adsorbs the oxygen electrode, the NO x The environment is gaseous NO x ambient or liquid NO x Environment: The oxygen electrode after the adsorption will be replaced by an electrochemical reduction reaction to complete the regeneration of the oxygen electrode electrocatalyst. The invention converts the regeneration method of high-potential oxidation poisoned substances into low-potential reduction regeneration, which can not only eliminate the poisoning effect of sulfur-containing gas in air impurities on the oxygen electrode electrocatalyst, but also avoid the influence of high-potential oxidation regeneration on catalyst stability. The method of the invention is fast and efficient.

Description

Technical field [0001] The present invention belongs to the field of electrocatalysis; Specifically, it involves a regeneration device and a regeneration method thereof to eliminate the effect of air impurities on the toxicity of the electrocatalyst of the oxygen electrode. Background [0002] Oxygen electrode is a gas electrode that can reduce oxygen, and is an important part of fuel cells, metal air batteries, electrolyzed water, hydrogen peroxide generators and other devices. In order to be easy to operate and save costs, air is often used in practical applications instead of oxygen as a reactant. There are a large number of toxic species in the air that may greatly reduce the electrocatalytic activity and stability of oxygen electrodes, such as SO 2 ，SO 3 ，NO 2 ，NO，H 2 S，CO，CO 2 ，O 3 Organic small molecules (formic acid, methanol, ethanol, acrylic, acetonitrile, methyl methacrylate, naphthalene, acetylene, etc.), metal ions, etc., these impurities will have a strong interacti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/04B01J38/10B01J38/48B01J38/64H01M8/008B01J27/28B01J23/96
CPCB01J38/04B01J38/48B01J38/10B01J38/64B01J27/28H01M8/008B01J23/96Y02W30/84
Inventor 尹鸽平刘玉鑫李凌峰杜磊孔凡鹏
Owner HARBIN INST OF TECH