Electrocatalytic reduction of carbon dioxide by substituted pyridine and pyrazole complexes of palladium

✍ Scribed by A.G.M.Mostafa Hossain; T. Nagaoka; K. Ogura

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 780 KB
• Volume: 41
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(96)00136-3

✦ Synopsis

A series of [PdCI,L,] complexes (L = substituted pyridine and pyrazole) has been tried as an electrocatalyst for the reduction of CO, in acetonitrile (AN) containing 0.1 M tetraethylammonium perchlorate (TEAP) at glassy carbon or Pt electrodes. The complexes working as the catalyst were [PdCI,L,] (L = Pyrazole (Pyra), 4-Methylpyridine (4-Mpy) and 3-methylpyrazole (3-Mpyra)

) at an applied potential of -l.lOV vs Ag/lOmM Ag+ and the reduction products were formic acid and H, with no CO. The current efficiency for the formation of formic acid were 10, 20 and 10.2% for Pd complexes of Pyra, 4-Mpy and 3-Mpyra, respectively. The current efficiency for the hydrogen evolution were 31-54'S, and the source of the formate proton and hydrogen was from the added water (4% by volume).