Here, the greatest concern is that the proton donors and acceptors activities, from a certain value, have no effect on the reaction rate, resulting in a zeroth reaction order rather than half as the B-V model predicts . This author proposes from his work on polycrystalline platinum that it is ubiquitous in acidic, alkaline , and in the presence of other pH buffer systems. Instead, Lou et. al. argues that this phenomenon is only present in alkaline systems from their work on Pt(111) .