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Stabilizing Lead Cathodes with Diammonium Salt Additives in the Deoxygenation of Aromatic Amides
Author(s) -
Edinger Carolin,
Grimaudo Valentine,
Broekmann Peter,
Waldvogel Siegfried R.
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.201402050
Subject(s) - deoxygenation , cathode , chemistry , electrochemistry , cyclic voltammetry , amide , electrolyte , cationic polymerization , salt (chemistry) , anode , inorganic chemistry , cathodic protection , organic chemistry , catalysis , electrode
Lead is efficiently protected against cathodic corrosion by the addition of diammonium salts in the electrolyte. The cationic coating of the cathode allows the efficient electroreduction of benzamides to benzylamines. The electrochemical deoxygenation of the amide is achieved without the use of oxophilic agents or sacrificial anodes. The surface of the lead cathode stays smooth and the cathode can be reused for multiple runs, providing <2.5 ppm of the crude product. Cyclic voltammetry studies reveal a shift in the onset potential of the hydrogen evolution reaction by −157 mV.