WO2025068691 - DE-ALLOYED ELECTROCATALYST
National phase entry is expected:
Publication Number
WO/2025/068691
Publication Date
03.04.2025
International Application No.
PCT/GB2024/052467
International Filing Date
25.09.2024
Title **
[English]
DE-ALLOYED ELECTROCATALYST
[French]
ÉLECTROCATALYSEUR DÉSALLIÉ
Applicants **
JOHNSON MATTHEY HYDROGEN TECHNOLOGIES LIMITED
Inventors
MARTINEZ BONASTRE, Alejandro
CLARKSON, Jay Simon
HADDAD, Jibreel
PETRUCCO, Enrico Angelo
SPIKES, Geoffrey Hugh
Priority Data
2314628.5
25.09.2023
GB
2315538.5
11.10.2023
GB
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
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| Number of Office Actions | * |
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International Searching Authority |
EPO
* |
| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
* |
| Type of Assignment |
The Standard Agent's Assignment
* |
| Applicant's Legal Status |
Legal Entity
* |
| * | |
| * | |
| * | |
| * | |
| * | |
| Entry into National Phase under |
Chapter I
* |
| Patent Delivery |
Send the Letters Patent by Courier
* |
| Translation |
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* The data is based on automatic recognition. Please verify and amend if necessary.
** IP-Coster compiles data from publicly available sources. If this data includes your personal information, you can contact us to request its removal.
Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2050 | |
| EPO | Filing, Examination, Granting | 8126 | |
| Japan | Filing, Examination, Granting | 2124 | |
| South Korea | Filing, Examination, Granting | 2042 | |
| USA | Filing, Examination, Granting | 5340 |
Total:
19,682
The term for entry into the National Phase has expired. This quotation is for informational purposes only
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Abstract[English]
The present invention provides a process for preparing solid, non-porous, de-alloyed electrocatalyst particles, the process comprising the steps of: providing solid, non-porous, platinum group metal alloy precursor particles PMn in which P is a platinum group metal and M is at least one alloying metal; in a de-alloying step to provide the solid, non-porous, de- alloyed electrocatalyst particles; supplying carbon monoxide to the precursor particles under conditions which remove at least some of the metal M from the surface of the precursor particles; wherein the de-alloyed electrocatalyst particles are particles of a platinum group metal alloy PMX in which P is a platinum group metal and M is at least one alloying metal, wherein the total atomic composition relative to P of M at the surface of the de-alloyed electrocatalyst is lower than the total atomic composition relative to P of M in the bulk of the de-alloyed electrocatalyst, and wherein x is less than n.[French]
La présente invention concerne un procédé de préparation de particules d'électrocatalyseur désallié non poreuses, solides, le procédé comprenant les étapes consistant à : fournir des particules de précurseur d'alliage métallique du groupe du platine non poreuses solides PMn, dans laquelle P est un métal du groupe du platine et M est au moins un métal d'alliage ; dans une étape de désalliage pour fournir les particules d'électrocatalyseur désallié non poreuses, solides ; fournir du monoxyde de carbone aux particules de précurseur dans des conditions qui éliminent au moins une partie du métal M de la surface des particules de précurseur ; les particules d'électrocatalyseur désallié étant des particules d'un alliage métallique du groupe du platine PMX, dans laquelle P est un métal du groupe du platine et M est au moins un métal d'alliage, la composition atomique totale par rapport à P de M à la surface de l'électrocatalyseur désallié étant inférieure à la composition atomique totale par rapport à P de M dans la masse de l'électrocatalyseur désallié, et x étant inférieur à n.