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Formation of Metallic Mercury During Photodegradation/Photodarkening of α‐HgS: Electrochemical Evidence
Author(s) -
Anaf Willemien,
Janssens Koen,
De Wael Karolien
Publication year - 2013
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201303977
Subject(s) - photodarkening , mercury (programming language) , photodegradation , electrochemistry , chloride , metal , ion , chemistry , metal ions in aqueous solution , inorganic chemistry , photochemistry , materials science , photocatalysis , electrode , organic chemistry , fiber laser , computer science , catalysis , programming language , fiber
The red pigment α‐HgS tends to blacken in the presence of light and chloride ions. Hypotheses exist for the decomposition and discoloration, including formation of β‐HgS (black) or of metallic mercury, but these have not been detected on naturally or synthetically degraded HgS paint. Electrochemical experiments now demonstrate the formation of metallic mercury in the presence of light and chloride ions.