Electrosubstitution at the Metal, Metal Compounds/Na–β″-Al2O3Interface in the SOED Method

✍ Scribed by Yasumichi Matsumoto; Kazuaki Akagami; Kai Kamada

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 120 KB
• Volume: 143
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1998.8094

✦ Synopsis

The electrochemical reaction and electrosubstitution of a metal from the pure metal, its oxide, or its carbonate at the Na--Al 2 O 3 interface, which are very important as a cationic source in the solid oxide electrochemical doping (SOED) method, have been studied. Ag ؉ was easily electrosubstituted for Na ؉ in Na--Al 2 O 3 at a low applied voltage, but not the metal ions from metal oxides because of their strong binding energy. Some cations from their carbonates were substituted for Na ؉ at a relatively low applied voltage. Consequently, some metal salts as well as pure metals can be useful as the electrode for a cationic source in the SOED method. The mechanism of the electrosubstitution is discussed.