Patent ID: 11894566
Assignee: ROBERT BOSCH GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 3:
4. The fuel cell stack of claim 1, wherein
the first catalyst composition includes a first catalyst core made of an alloy and a catalyst skin made of pure Pt, the alloy being selected from the group consisting of a Pt-M alloy and a Pt-M-M′ alloy, M is a metal element, M′ is a metal element different than M, M and M′ are each selected from the group consisting of Co, Ni, Re, W, Mo, Ge, Sn, Nb, Ta, and Ti;
the second catalyst composition includes a second catalyst core made of an alloy and a catalyst skin made of pure Pt, the alloy being selected from the group consisting of a Pt-M alloy and a Pt-M-M′ alloy, M and M′ are each selected from the group consisting of Co, Ni, Re, W, Mo, Ge, Sn, Nb, Ta, and Ti; and
the third catalyst composition includes a third catalyst core made of an alloy and a catalyst skin made of pure Pt, the alloy being selected from the group consisting of a Pt-M alloy and a Pt-M-M′ alloy, M and M′ are each selected from the group consisting of Co, Ni, Re, W, Mo, Ge, Sn, Nb, Ta, and Ti, and at least one of the first, the second, and the third catalyst core being different.