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Platinum alloy nanocatalysts with non-platinum cores

A catalyst and catalyst layer technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problem of platinum reducing activity and other issues

Active Publication Date: 2017-05-03
AUDI AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A significant challenge associated with trying to reduce the amount of platinum is that it tends to reduce the activity that facilitates catalytic reactions

Method used

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  • Platinum alloy nanocatalysts with non-platinum cores
  • Platinum alloy nanocatalysts with non-platinum cores
  • Platinum alloy nanocatalysts with non-platinum cores

Examples

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Embodiment Construction

[0013] figure 1 Selected portions of fuel cell 20 are shown schematically. Membrane electrode assembly 22 includes catalyst layers 24 and 26 on opposite sides of membrane 28 . For discussion purposes, catalyst layer 24 is considered an anode electrode layer and catalyst layer 26 is considered a cathode electrode layer.

[0014] Fluid distribution plate 30 includes a plurality of ribs 32 and channels 34 for delivering a reactant, such as hydrogen, to electrode assembly 22 through gas diffusion layer 36 . When a reactant, such as hydrogen gas, reaches the anode electrode catalyst layer 24 , the hydrogen ions and electrons separate in a known manner as part of the electrochemical reaction facilitated by the fuel cell 20 .

[0015] Another fluid distribution plate 40 includes a plurality of ribs 42 and channels 44 for delivering another reactant, such as oxygen, through a gas diffusion layer 46 to the cathode electrode catalyst layer 26 .

[0016] At least one of the electrode ...

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Abstract

According to an embodiment, the platinum alloy particle comprises a core comprising a material other than platinum. The shell on the core consists of platinum. The housing has a plurality of facets. At least a majority of the facets are {111} facets.

Description

technical field [0001] The subject matter of the present disclosure relates generally to fuel cell components. More particularly, the disclosed subject matter relates to catalyst materials suitable for use in fuel cell components. Background technique [0002] Fuel cells generate electricity based on electrochemical reactions. A typical fuel cell arrangement includes a membrane between two electrode layers to facilitate the electrochemical reaction. Electrode layers are often referred to as catalyst layers. One of the catalysts is usually called the anode and the other is usually called the cathode. [0003] At least the anode layer includes a material such as platinum, which has been shown to be effective in facilitating the oxidation of a fuel, such as hydrogen, to convert the fuel into positively charged ions and negatively charged electrons. While platinum has proven useful and effective, it is an expensive material. [0004] Considerable efforts have been made to r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92H01M4/90H01M4/86B01J35/00
CPCH01M4/8668H01M4/9016H01M4/921H01M4/8657Y02E60/50H01M4/926
Inventor M.邵
Owner AUDI AG