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Rekonstrukcja powierzchni ściany (100) monokryształu złota w środowisku elektrochemicznym

Skołuda P.

Wiadomości Chemiczne

1999

[Z] 53, 1-2

115-133

The low-index single crystal surfaces of gold and platinum are known to reconstruct under ultra-high-vacuum conditions. It has been demonstrated that many of these reconstruction phenomena can also be observed for the metal surface in contact with an electrolyte. The data presented will focus on the surface reconstruction of Au(100) electrode in view of the results of recent electochemical studies. We shall describe the preparation and the conditions under which Au(100)-(hex) surface is stable in solution. Flame annealed Au(100) surface is reconstructed and it is demonstrated under what conditions this initial (thermally induced) reconstruction is preserved during and after the contact with an electrolyte. The so-called charge-induced reconstruction and its influence on electrochemical adsorption reactions is presented. The kinetics studies of surface structural transition due to charge-induced reconstruction or anion-induced lifting of the reconstruction are discussed in some detail. Finally, the role of the surface charge and the coverage of the adsorbate in the lifting of the reconstruction of Au(100) surfaces is briefly discussed.