Kinetics of electrochemical hydrogen evolution and dissolution on graphite in molten KHSO4

✍ Scribed by E.J. Balskus; J.J. Podestá; A.J. Arvia

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 145 KB
• Volume: 15
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(70)80075-5

✦ Synopsis

ALTHOUGH the electrochemical evolution of hydrogen on graphite in bisulphate melts has been studied under a limited range of experimental conditions,l no data have been reported about the anodic oxidation of hydrogen in molten electrolytes. An investigation of these reactions was attempted by employing spectroscopic grade graphite and molten potassium bisulphate in the temperature range 230-280°C.

Cathodic potentiostatic and galvanostatic cd/voltage curves were coincident. Good Tafel lines were obtained over the cd range of 9 x 10" A/cm2 to 15 x 1O-3 A/cm2. However, the Tafel slopes, @I)~,~, were lower with either fresh or recently polished