New experimental evidence on the formation of platinum superactive sites in an electrochemical environment

Ethanol electro-oxidation: Cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic oscillation

“…The phenomenon that this reduction peak is sharper than the corresponding oxidation peaks may imply that the reduction reaction of Pt oxides/hydroxides is a fast step. The obtained CV pattern of Pt electrode in 0.5 mol L À1 H 2 SO 4 solution is same as that reported in literature [3,24,25], which has confirmed our experimental quality. There is no impurity in the solution and on the electrode surface.…”

From single crystal surfaces to single atoms: investigating active sites in electrocatalysis

“…This led to a somewhat controversial model of electrocatalysis named the Incipient Hydrous Oxide Adatom Mediator (IHOAM) model 61 where it was postulated that electrocatalytic reactions were mediated by a surface conned M*/hydrous oxide species, however the role that activated chemisorption played in electrocatalytic reactions was not discounted. Other groups reported similar phenomenon with cathodically polarised Pt electrodes 72,73 and recently such behaviour has been observed on electrodeposited gold, 74-77 palladium 78 and copper 79 nanostructures.…”

The effect of the electrode surface roughness at low level of coarseness on the polarization characteristics of electrochemical processes

“…Electrocatalysts are produced in different ways, on different substrates and for different purposes [8][9][10][11][12][13][14][15][16][17], but almost in all cases the electrochemical characterization was performed by using cyclic voltametry observations. In this way, it was not possible to analyze the effects of the mass-transfer limitations on the polarization characteristics of electrochemical processes.…”