The need to develop cleaner/greener methods of both energy production and chemical synthesis has been driving renewed interest in electrocatalysis. Experimental advances in the application of spectroscopic methods such as IR, INS, NMR, and XAS, and structural probes such as STM, AFM, high resolution TEM, and XRD are providing a wealth of data that enable structure/property relationships in electrocatalysis to be investigated. These event will discuss these issues.