Structural Inhibition of Silver Surface Oxidation
Structural Inhibition of Silver Surface Oxidation
复制标题
银表面氧化的结构抑制
DOI:
10.1021/acs.jpcc.1c04368
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Killelea, Daniel R.
中科院分区:
文献类型:
--
作者:
Turano, Marie E.;Juurlink, Ludo B.;Gillum, Maxwell Z.;Jamka, Elizabeth A.;Killelea, Daniel R.
Surface structure and oxidation are key to silver-based heterogeneous catalysis. Prevention of surface reconstruction may favor electrophilic oxygen, which is believed to be the active species in silver-catalyzed oxidation. To determine whether terrace width or step geometry enables control of oxidation and concomitant reconstruction, we investigated oxidation of the topmost layer of a curved Ag(111) crystal. This crystal contains a range of terrace widths having either A- or B-type step geometries. Atomic oxygen was used to facilitate oxidation, temperature-programmed desorption quantified the extent of oxygen adsorption, and scanning tunneling microscopy characterized the formation of reconstructed areas. While A-type steps prove to have little influence, B-type steps hinder reconstruction. We attribute the difference to geometric-dependent growth mechanisms of silver oxide surface reconstructions.
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