Comment on “Carbon nanowalls as material for electrochemical transducers” [ Appl. Phys. Lett. 95, 014104 (2009) ]

摘要

In a Letter by Lauis et al.,n1ncarbon nanowalls were syn-nthesized with a new approach without the presence of anynmetallic catalyst. Due to the absence of metallic impurities, itnhas been claimed that this nanomaterial is useful for electro-nchemical transducers. To this aim, an amorphous carbon wasnused as the substrate electrode u0001a-Cu0002, and the carbon nanow-nalls were deposited vertically on this substrate to prepare annew electrode called CNW electrode. Then, the basic elec-ntrochemical behaviors of these two electrodes u0001a-C andnCNWu0002 were compared to prove excellent electrochemicalnproperties of the CNW electrode. Though, this comparison isnnot appropriate and justified to make this conclusion; therenare some serious problems in the electrochemical investiga-ntions