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Core-shell NANO particle catalysts

A nanoparticle and core-shell nanotechnology, applied in the field of core-shell nanoparticle catalysts, can solve the problems of slow kinetic process and limited commercial development

Inactive Publication Date: 2019-08-09
THE HONG KONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0001] The extremely slow kinetics of the cathodic oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) limits its commercial development

Method used

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  • Core-shell NANO particle catalysts

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Effect test

preparation example Construction

[0012] Using the preparation method described in this application, the crystal planes of the core-shell nanoparticles can have {111} planes, and most of the crystal planes of the core-shell nanoparticles can be {111} planes. In one embodiment, core-shell nanoparticles can be supported on carbon or other types of supports as the final product.

[0013] In one embodiment, the method of preparing core-shell nanoparticles may include mixing one or more platinum group metals (i.e. Ru, Rh, Pd, Os, Ir and Pt), noble metals (i.e. Ru, Rh, Pd, Os, Ir, Pt, Cu, Ag, Re and Au), platinum group metals and noble metal oxides form a first solution in one or more first solvents. The first solution is then oxidized and heated, and the supernatant discarded to obtain the first nuclear product.

[0014] The platinum precursor, the alloy precursor and the first nuclei product are mixed in one or more second solvents to form a second solution. The second solution is then heated and mixed, and afte...

Embodiment 1

[0018] Embodiment 1, a plurality of core-shell nanoparticles, each core-shell nanoparticle comprises:

[0019] nuclear; and

[0020] shell.

Embodiment 2

[0021] Example 2, in the core-shell nanoparticles of Example 1, the core is a ruthenium core, and the shell is a platinum shell or a platinum alloy shell.

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Abstract

Core-shell nano particles and methods of fabricating core-shell nano particles are provided. A core-shell nano particle can include an inner core (1) surrounded by an outer shell (2). The core (1) caninclude one or more platinum group metal, noble metal, oxidized platinum group metal, and / or oxidized noble metal. The shell (2) can be platinum or platinum alloy. The platinum alloy can be a mixtureof platinum and transition metals. The core (1) can be an oxidized ruthenium core, and the shell (2) can be a platinum-nickel alloy. A carbon source can also be included to act as a support for the core-shell nano particles.

Description

Background technique [0001] The cathodic oxygen reduction reaction (ORR) kinetics in proton exchange membrane fuel cells (PEMFCs) is extremely slow, which limits its commercial development. In order to reduce the cost of fuel cells, it is imminent to develop highly active ORR catalysts that are superior to current platinum (Pt) / C catalysts. Contents of the invention [0002] Embodiments of the present invention improve upon the prior art by introducing novel oxygen reduction reaction catalysts and methods of preparing such oxygen reduction reaction catalysts. [0003] Embodiments of the invention include core-shell nanoparticles and methods of making such core-shell nanoparticles. More specifically, embodiments of the invention relate to core-shell nanoparticle catalysts useful in oxygen reduction reactions. The core-shell nanoparticles in some embodiments of the present invention can be used in the cathode reaction of fuel cells. [0004] In many embodiments, core-shell ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B01J23/42B01J23/46
CPCB82Y30/00B82Y40/00H01M4/8657H01M4/921H01M4/926H01M2008/1095Y02E60/50
Inventor 邵敏华常乔婉
Owner THE HONG KONG UNIV OF SCI & TECH
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