Report on site density and turn over frequency of selected benchmark catalysts

This report will describe the site density and turn over frequency of selected benchmark catalysts from Task 2.1 The active sites of the M-N-C type catalysts will be identified using XAS and XPS, while the SD and TOF values will be evaluated using literature-established methods such as low temperature CO chemisorption, and the combined BET and XPS quantifications (developed at TUB). We will assess how the characteristic methodologies correlate with each other. These, in combination with the H-cell delivered electrochemical performance, will be used as a baseline to guide the needs to either increase the SD or TOF for reaching the activity targets of the call, to better assess the activity improvements of the new M-N-C catalysts prepared in Task 2.3, and to establish a common base level activity to compare the newly developed catalysts to the catalytic activity and selectivity.