阅读说明：本技术 一种消除燃料电池阳极中毒的方法 (Method for eliminating anode poisoning of fuel cell ) 是由 张翼翔 于 2020-06-18 设计创作，主要内容包括：本发明提供了一种消除燃料电池阳极催化剂中毒的方法,通过向燃料电池的阳极通入适量氧化剂(空气或氧气),使得吸附在阳极催化剂表面的CO被氧化,从而消除燃料电池阳极的中毒。(The invention provides a method for eliminating anode catalyst poisoning of a fuel cell, which is characterized in that an appropriate amount of oxidant (air or oxygen) is introduced into an anode of the fuel cell, so that CO adsorbed on the surface of an anode catalyst is oxidized, and the anode poisoning of the fuel cell is eliminated.)

1. A method of eliminating anode poisoning in a fuel cell, comprising: on the basis of the common fuel cell, a device capable of controlling the injection of a proper amount of oxidant (oxygen or air) to the anode is added, including but not limited to a newly added air inlet, a control valve, a device for detecting anode poisoning and a corresponding circuit.

2. The method of eliminating fuel cell anode poisoning of claim 1, wherein: after anode poisoning is detected, an appropriate amount of oxidant (oxygen or air) is injected into the anode through either the existing inlet or the newly added inlet.

3. The method of eliminating fuel cell anode poisoning of claim 1, wherein: and after the anode poisoning is detected to be small, the oxidant (oxygen or air) is stopped from being introduced into the anode, and the fuel cell normally works.

Technical Field

The invention relates to the field of chemical fuel cells, in particular to a method for eliminating anode poisoning of a fuel cell.

Background

In a conventional fuel cell, particularly, a fuel cell using a carbonaceous material such as methanol or formic acid as a reducing agent, CO is easily generated in an anode reaction. CO adsorbs on the anode catalyst, poisoning the anode catalyst and reducing the catalytic activity. The current idea is to utilize noble metal alloy catalysts to improve the resistance to CO poisoning or to find non-noble metal catalysts, but doing so would greatly increase the cost and reduce the catalytic activity of the anode catalyst.

Disclosure of Invention

The present invention aims at providing one method of eliminating anode poisoning of fuel cell to solve the problem of anode poisoning of fuel cell.

In order to achieve the purpose, the invention provides the following technical scheme: a method for eliminating anode poisoning of fuel cell comprises injecting appropriate amount of oxidant (such as air or oxygen) into anode to oxidize CO, thereby achieving the purpose of detoxification.

Compared with the prior art, the invention has the beneficial effects that: under the premise of not changing the components and structure of the anode catalyst, the anode catalyst is detoxified by a simple method, and the service life of the anode catalyst and the overall service life of the fuel cell are greatly prolonged.

Drawings

The accompanying drawings, which are included to provide a further explanation of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention, which is an improvement on the basis of a conventional fuel cell, wherein the cathode, the anode, the load, the diffusion layer, etc. are known and will not be described again. In operation, fuel (such as methanol, formic acid, etc. containing carbon or its aqueous solution) is injected from b, oxidant (such as oxygen or air) is injected from c, and carbon dioxide (CO) is oxidized₂) The product water (H) is reduced by exclusion from a₂O) is discharged from d. In the figure: e is an air inlet capable of controlling on-off, and a proper amount of oxidant (oxygen or air) can be injected into the anode through e

Fig. 2 shows another embodiment of the present invention, which is different from fig. 1 in that the gas inlet e and the fuel injection port b are combined, i.e. the port b can be controlled to be capable of introducing fuel or oxidant, or can be simultaneously introduced with fuel or oxidant.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person of ordinary skill from the embodiments of the present invention without making creative efforts, fall within the scope of the present invention.

Referring to fig. 1, the present invention provides a method for eliminating anode poisoning of a fuel cell, which adds an e-gas inlet to inject a certain amount of oxygen to the anode based on a standard common fuel cell.

When the fuel cell works normally, the e air inlet is closed, and the fuel cell discharges normally. If poisoning of the anode electrode is detected, the e air inlet is opened, a proper amount of oxidant (oxygen or air) is injected into the anode, CO of the anode electrode is oxidized after a period of time, and when the anode electrode is detected not to be poisoned, the e air inlet is closed, and the fuel cell works normally again.

See fig. 2. Unlike fig. 1, fig. 2 does not add a new intake port, but rather utilizes an existing fuel intake port. When the fuel cell works normally, b is introduced with corresponding fuel, and the fuel cell discharges normally. If the anode electrode is detected to be poisoned, a proper amount of oxidant (oxygen or air) is introduced into the port b and injected into the anode, CO in the anode is oxidized after a period of time, and when the anode electrode is detected not to be poisoned, fuel is introduced into the port b again, and the fuel cell works normally again.