Developing of Design Criteria for Highly Efficient Fuel Cells

摘要

Catalytic activity of islands and single clusters prepared on different substrates using either delocalized deposition pulse technique or tip induced deposition in a electrochemical scanning tunneling microscope (EC STM) was studied in order to determine the optimal size and distribution of catalytic active metals. Activity at these islands, single clusters, as well as cluster arrays has been measured in situ immediately after preparation to avoid degeneration. In case of single Pd clusters and cluster arrays, our new developed technique utilizing an STM tip for local reactivity measurements has been applied. Furthermore, a novel preparation procedure for catalytically active nanoprobes has been developed to apply the pH sensing effect of hydrogen loaded Pd in future investigations.