Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Making catalytic electrode – process only
Reexamination Certificate
2006-11-21
2006-11-21
Ryan, Patrick Joseph (Department: 1745)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Making catalytic electrode, process only
C429S047000
Reexamination Certificate
active
07138355
ABSTRACT:
The disclosure concerns a method of preparing an ink (P) which can be used for the manufacture of a functional layer (6), in particular for the manufacture of an electrode for fuel cells, which ink contains dispersely distributed particles (101, 102) forming two solid phases, with catalytic reactions being able to be activated in the manufactured functional layer on a gas/solid interface by a combined action of the two solid phases and with gaseous reactants. In a first step (1), the solid phases are formed as fine-grain particles (P1, P2) and the particles of both solid phases are dispersed in a first liquid (L1) in a mixed and homogeneously distributed manner (2). Heterogeneous conglomerates (P3) of the fine-grain particles are formed from the thereby created dispersion (D); these conglomerates are mixed to form a homogeneous ink (P), after sintering (4), by addition of a second liquid (L2) and by comminution (5), with particles formed in the first step having such a fine grain that the heterogeneous conglomerates and their fractions each contain a plurality of particles of both solid phases after comminution.
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DATABASE WPI, Section Ch, week 200229, Derwent Publications Ltd., AN 2002-227718. XP002273551.
Batawi Emad
Voisard Cyril
Parsons Thomas H.
Sulzer Hexis AG
Townsend and Townsend / and Crew LLP
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