The synthesis of hundreds of model electrocatalysts, produced by a high throughput (HT) physical vapour deposition method, and interrogated using HT screening methods, provides a powerful tool for catalyst discovery and optimisation.  In the case of supported platinum, we show how the particle size and support strongly influences the activity of the catalyst. The phase of, for example, an oxide such as doped titania critically influences the cathodic oxygen reduction (ORR) activity and stability of the system. The support can also strongly influence the CO tolerance of platinum at the anode.  The combination of ab-initio theory and electrocatalyst screening provides a powerful combination in the search for precious metal alloy and non noble metal alloy catalysts, as well as alternative materials such as carbides. Examples are given for anode hydrogen oxidation (HOR) catalysts such as Pd based alloys, tungsten copper alloys and tungsten carbides.

High throughput discovery and optimization of PEMFC electrocatalysts: Particle size effects, new supports and non-noble metal systems

243rd National Meeting (2012)

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