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US 2025/0167253 A1Published application
Grafted catalyst
AssigneeRobert Bosch GmbH
InventorsNicola Molinari, Karim Gadelrab, Bjoern Stuehmeier, Felipe Mojica
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Abstract
Catalyst with ionomer-like polymeric chains grafted thereto are disclosed. The ionomer-like chains provide a reactant bridge for between the catalyst and ionomer such as in a fuel cell, especially when deposited in deep pores or cervices. In a refinement, the polymeric chains are deposited on less active facets of the catalyst.
Claims20
An electrochemical cell comprising:
- a pair of electrodes;
- and
- a plurality of catalyst particles deposited on a catalyst support, each catalyst particle having sections with greater activity, sections with less activity, and polymeric chains grafted to the sections with less activity, the polymeric chains operating as a reactant bridge between the catalyst and an ionomer.
A catalyst layer comprising:
- a porous catalyst support;
- a catalyst deposited on the porous catalyst support;
- and
- a plurality of polymeric chains grafted to the catalyst, the plurality of polymeric chains including acid functional groups.
1 more element
A method of preparing a catalyst layer comprising:
- providing a catalyst supported by a catalyst support;
- and
- grafting polymeric chains having ionic functional groups to the catalyst at undercoordinated facets.
Dependencies are inferred from the claim text.