Graphene-based precursor structures
AssigneeRobert Bosch GmbH
InventorsNicola MOLINARI, Jonathan BRAATEN, Bjoern STUEHMEIER, Lei CHENG, Karim GADELRAB, Shirin MEHRAZI
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Abstract
A method of improving catalyst accessibility of a carbon precursor includes exposing a graphene-based multi-layer precursor structure to a plurality of electrocatalyst clusters by applying voltage to accelerate the clusters towards the graphene-based multi-layer precursor structure to generate both mechanical defects in the graphene-based multi-layer precursor structure's surface and a near-uniform size population of deposited electrocatalyst at a near-uniform depth in the graphene-based multi-layer precursor structure.
Claims20
A method of improving catalyst accessibility of a carbon precursor, the method comprising:
- exposing a graphene-based multi-layer precursor structure to a plurality of electrocatalyst clusters by applying voltage to accelerate the clusters towards the graphene-based multi-layer precursor structure to generate both
- mechanical defects in the graphene-based multi-layer precursor structure's surface and
- a near-uniform size population of deposited electrocatalyst at a near-uniform depth in the graphene-based multi-layer precursor structure.
A method of improving catalyst accessibility of a carbon precursor, the method comprising:
- repeatedly bombarding a graphene-based multi-layer precursor structure with a group of electrocatalyst clusters, selected based on at least one predetermined value, to gradually increase porosity of the structure while depositing the electrocatalyst clusters within the structure, the repeated bombardment including application of a constant ionizing energy.
A method of electrocatalyst deposition onto a carbon precursor, the method comprising:
- providing clusters of electrocatalyst particles based on a degree of uniformity of the cluster size,
- accelerating the clusters of electrocatalyst particles towards graphene-based multi-layer precursor structure by application of a voltage field in a range of about 1 to 10 MV and 10s of keV/atom to 10s of MeV/atom;
- and
- colliding the accelerated clusters of electrocatalyst particles with the graphene-based multi-layer precursor structure to deposit the clusters of electrocatalyst particles based on a depth deposition criteria.
Dependencies are inferred from the claim text.