A Novel Effect. Changes in the Electrochemical Response of Polycrystalline Platinum Promoted by Very Fast Potential Perturbations

Abstract

not Available.

A mechanistic model for the electrochemical facetting of metals with development of preferred crystallographic orientations

“…After that, only a slight change in roughness is found in additional Monte Carlo cycles. The last statement and conclusion (a) agree with the electrochemical data obtained for Pt( 111) preferred orientation [1,2,4,15] Furthermore, the conclusion (b) is supported by scanning tunneling microscope imagesCl9, 201 and scanning electron micrographies [21].…”

Changes in the surface morphology of platinum electrodes produced by the application of periodic potential treatments in alkaline solution

“…It is already well established that the surface morphology of Pt electrodes can be modified substantially by means of periodic perturbing potential treatments [1][2][3] . In acid electrolytes single stage treatments can, under certain conditions, produce a definite type of preferred crystalline orientation (pco) at the Pt surface [4][5][6] . For other conditions, treatments comprising two successive stages, namely, a first one where a hydrous metal oxide layer is accumulated on the electrode surface through a periodic potential treatment, and a second one involving the electroreduction of the hydrous Pt oxide layer, can furnish both pco and surface roughness development [7] .…”

Scanning electron microscopy and voltammetry of preferentially oriented polycrystalline platinum surfaces

“…Recently, Cervino, Triaca and Arvia [5] have made the observation that the hydrogen adatom voltammetric fingerprints of platinum single crystal surfaces can be obtained via an electrochemical preparation of polycrystalline platinum material. The treatment consists in the application of a very fast potential scan to the polycrystalline material in aqueous electrolytes.…”