Aj. Saterlay et al., Lead dioxide deposition and electrocatalysis at highly boron-doped diamondelectrodes in the presence of ultrasound, J ELCHEM SO, 148(2), 2001, pp. E66-E72
Boron-doped diamond (BDD) is a versatile and novel electrode material which
, due to its mechanical and chemical robustness, wide potential window, low
background interference, and ease of chemical modification, is becoming an
interesting alternative to conventional electrodes for a wide range of ele
ctrochemical applications. It is shown in this study that BDD is a good sub
strate for the ultrasound-enhanced electrodeposition of lead dioxide, produ
cing strongly adhered electrically conducting deposits. Power ultrasound is
used to enhance both the efficiency of the PbO2 deposition procedure and t
he rate of the electrocatalytic ethylene glycol oxidation process at the Pb
O2-modified BDD electrode. The presence of high levels of aqueous organic m
aterial is shown to interfere with the lead dioxide deposition process. Und
er optimized insonation conditions the PbO2 deposit, quantified by using ca
thodic shipping voltammetry, is shown to be mechanically stable. When used
in conjunction with power ultrasound to perform the electrocatalytic oxidat
ion of ethylene glycol two distinct types of oxidation processes at PbO2, c
hemically rate limited and electrochemically rate limited, are observed. (C
) 2001 The Electrochemical Society. All rights reserved.