Compositional segregation in shaped Pt alloy nanoparticles and their structural behaviour during electrocatalysis
by Chunhua Cui, Lin Gan, Marc Heggen, Stefan Rudi, and Peter Strasser
At present, the development of hydrogen fuel cells is being hindered by the high material costs of platinum. Large quantities of the expensive noble metal are still required for the electrodes in the fuel cells at which the chemical conversion processes take place. Scientists from the TU-Berlin and the Ernst Ruska-Centre in Jülich have developed a material for converting hydrogen and oxygen to water using a tenth of the typical amount of platinum previously required. With the aid of aberration-corrected electron microscopy, the researchers discovered that the function of the nanometre-scale catalyst particles is decisively determined by their geometric shape and atomic structure. This discovery opens up new paths for further improving catalysts for energy storage.
Chunhua Cui, Lin Gan, Marc Heggen, Stefan Rudi, and Peter Strasser: Compositional segregation in shaped Pt alloy nanoparticles and their structural behaviour during electrocatalysis, Nature Materials 12 (2013) 765-771.