LAUSR

The catalytic activity of surface-confined molecular species, as affected by the nature of the support, has been investigated by square wave voltacoulometry (SWVC). This technique has proven to be very powerful and advantageous for the study of electroactive and electrocatalytic monolayers. Here, the value of SWVC for the elucidation of the catalytic species and routes when the catalyst can undergo multiple electron transfers is assessed. The redox behavior in acidic water solution of the immobilized Keggin type polyoxomolybdate [PMo12O40]3– and its catalytic performance toward the reduction of bromate have been studied experimentally. Three different supports are considered: boron-doped diamond (BDD), bare glassy carbon, and graphene oxide modified glassy carbon. For all of them, the SWVC response enables the accurate identification and analysis of the catalytic pathways and species. Mechanistic details are easily obtained on the basis of the additivity of the contributions associated with the electron t...