Oxygen Reduction on Platinum Low-Index Single-Crystal Surfaces in Alkaline Solution:  Rotating Ring DiskPt( hkl ) Studies

The first results of a study of the oxygen reduction reaction on a rotating ring−disk electrode using single-crystal Pt disk electrodes in alkaline solution are presented. The order of activity of Pt(hkl) in 0.1M KOH increased in the sequence (100) (100) ≫ (110).