Abstract
The oxygen reduction reaction (ORR) posts a significant kinetic limit to hydrogen fuel cells, especially for polymer electrolyte membrane fuel cells (PEMFCs) operating at low temperatures. Highly active and durable electrocatalysts are required for reducing platinum group metal use and ensuring reliable device performance. The use of atomic layer deposition (ALD) and ALD transition metal oxides as dopants or templates are applied in controlled synthesis of highly active and durable Pt ORR catalysts. With density functional theory, these catalysts can also be designed with reliable theoretical guidance. The feasibility of their use in membrane electrode assemblies will be demonstrated.
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