Differential reactivity of Cu(111) and Cu(100) during nitrate reduction in acid electrolyte

摘要: The interactions of nitrate with Cu(100) and Cu(111) in acidic solution are studied by cyclic voltammetry (CV) situ electrochemical scanning tunneling microscopy (EC-STM). CV results show that reduction on commences at 0.0 V vs. Ag/AgCl while the corresponding potential is −0.3 Cu(100). EC-STM images terrace both atomically flat potentials more negative than −0.7 V. surface exhibits terraces throughout entire cathodic range. Close to OCP, step edges start corrode. In contrast Cu(100), first layer converted an rough defected surface—associated nascent oxidation positive This correlated reduction.