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From In Situ towards In Operando Conditions: Scanning Tunneling Microscopy Study of Hydrogen Intercalation in Cu(111) during Hydrogen Evolution
Author(s) -
Huynh Thi Mien Trung,
Broekmann Peter
Publication year - 2014
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201402147
Subject(s) - scanning tunneling microscope , hydrogen , intercalation (chemistry) , electrochemistry , electrode , materials science , copper , chemical physics , electrochemical scanning tunneling microscope , analytical chemistry (journal) , chemistry , inorganic chemistry , nanotechnology , scanning tunneling spectroscopy , metallurgy , organic chemistry , chromatography
We used electrochemical scanning tunneling microscopy to study the intercalation of hydrogen into a Cu(111) model electrode under reactive (in operando) conditions. Hydrogen evolution causes hydrogen intermediates to migrate into the copper lattice as function of the applied potential and the resulting current density. This H‐inclusion is demonstrated to be reversible. The presence of subsurface hydrogen leads to a significant surface relaxation/reconstruction affecting both the geometric and electronic structure of the electrode surface.