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Using Immiscible Liquid-Liquid Systems to Control the Dealloying of Non-Noble Metals From alloy Particles Containing Noble Metals

A technology of metal alloys and liquid mixtures, used in electrochemical generators, fuel cells, electrical components, etc., can solve the problem of expensive catalyst layers

Inactive Publication Date: 2015-01-21
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although catalyst layers used in fuel cells work reasonably well, such catalyst layers are expensive

Method used

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  • Using Immiscible Liquid-Liquid Systems to Control the Dealloying of Non-Noble Metals From alloy Particles Containing Noble Metals
  • Using Immiscible Liquid-Liquid Systems to Control the Dealloying of Non-Noble Metals From alloy Particles Containing Noble Metals
  • Using Immiscible Liquid-Liquid Systems to Control the Dealloying of Non-Noble Metals From alloy Particles Containing Noble Metals

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Embodiment Construction

[0040] Reference is now made in detail to presently preferred compositions, embodiments and methods of the invention, which constitute the best modes of carrying out the invention presently known to the inventors. The drawings are not necessarily drawn to scale. It is to be understood, however, that the disclosed embodiments are merely exemplary of the invention that can be embodied in various and alternative forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for any aspect of the invention and / or as a representative basis for teaching one skilled in the art to variously employ the invention.

[0041]Except in the examples or where it is clearly indicated otherwise, all numerical values ​​in this specification indicating amounts of materials or conditions of reaction and / or use should be understood to be understood by the word "about" when describing the broadest scope of the present invention. groom...

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Abstract

A method of controlling the de-alloying of metal alloy particles for fuel cell catalyst layers includes a step of forming a two-phase liquid system that comprises a first liquid and a second liquid. The first liquid is immiscible with the second liquid and the second liquid contains an acid. Metal alloy particles are added to the two-phase system to form a particle-containing liquid mixture. The particle-containing liquid mixture is agitated such that etched metal alloy particles are formed. The resulting etched metal alloy particles are then advantageously used to form fuel cell catalyst layers.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 61 / 846,335, filed July 15, 2013, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to methods of making alloyed (leached) catalysts to be used in fuel cell applications. Background technique [0004] Fuel cells are used as power sources in many applications. In particular, fuel cells have been proposed for use in automobiles to replace internal combustion engines. Commonly used fuel cell designs use solid polymer electrolyte ("SPE") membranes or proton exchange membranes ("PEM") to provide ion transport between the anode and cathode. [0005] In a proton exchange membrane type fuel cell, hydrogen is supplied to an anode as a fuel, and oxygen is supplied to a cathode as an oxidant. Oxygen can be pure oxygen or air (O 2 and N 2 mixture) form. Typically, a PEM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/926H01M4/921H01M2008/1095Y02E60/50
Inventor M·阿特万M·K·卡彭特
Owner GM GLOBAL TECH OPERATIONS LLC
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