The main focus of the presentation is set upon theoretical and direct instrumental identification of so-called active catalytic centers at the electrode surfaces. Identification of such active sites is not a trivial task nowadays. While recent theoretical approaches can be relatively simple [1 ], they require experimental verification. The latter can be in some cases done in-situ under reaction conditions using common electrochemical scanning tunneling microscopes (see Figure 1) [2]. Reactions, which are important for sustainable energy provision, such as hydrogen evolution reaction, oxygen reduction reaction and CO oxidation are used as illustrative examples. 


[1]    Calle-Vallejo(1), F.; Tymoczko(1), J.; Colic, V.; Vu, O.H.; Pohl, M.D.; Morgenstern, K.; Loffredo, D.; Sautet, P.; Schuhmann, W.; Bandarenka, A.S. Science, 2015, 350, 185-189.
[2]    Pfisterer(1 ), J.H.K.; Liang(1 ), Y.; Schneider, O.; Bandarenka, A.S. Nature, 2017, 549, 74-77.


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