TY - JOUR
T1 - Electrochemical generation of H2O2 using immobilized carbon nanotubes on graphite electrode fed with air
T2 - Investigation of operational parameters
AU - Khataee, A. R.
AU - Safarpour, M.
AU - Zarei, M.
AU - Aber, S.
PY - 2011/8/1
Y1 - 2011/8/1
N2 - Three cathode materials (i.e. bare graphite, activated carbon immobilized onto graphite surface (AC/graphite) and carbon nanotubes immobilized onto graphite surface (CNTs/graphite)) were investigated for electrochemical generation of hydrogen peroxide. The amount of electrogenerated H 2O2 using CNTs/graphite fed with air was nearly three times higher than that of AC/graphite and seven times higher than that of bare graphite. The effect of some operational parameters such as applied current, supporting electrolyte concentration, air flow rate and pH on the generation of H2O2 was investigated. Results indicated that the optimal conditions for H2O2 generation were applied current of 100 mA (2.5 mA/cm2), air flow rate of 2.5 L/min, and pH = 3. After eight times reuse, electrochemical generated hydrogen peroxide concentration dropped from 118.65 μM to 114.63 μM, indicating a decay of 3.6%. This fact indicates that the present system can be useful for the in situ electrochemical generation of hydrogen peroxide.
AB - Three cathode materials (i.e. bare graphite, activated carbon immobilized onto graphite surface (AC/graphite) and carbon nanotubes immobilized onto graphite surface (CNTs/graphite)) were investigated for electrochemical generation of hydrogen peroxide. The amount of electrogenerated H 2O2 using CNTs/graphite fed with air was nearly three times higher than that of AC/graphite and seven times higher than that of bare graphite. The effect of some operational parameters such as applied current, supporting electrolyte concentration, air flow rate and pH on the generation of H2O2 was investigated. Results indicated that the optimal conditions for H2O2 generation were applied current of 100 mA (2.5 mA/cm2), air flow rate of 2.5 L/min, and pH = 3. After eight times reuse, electrochemical generated hydrogen peroxide concentration dropped from 118.65 μM to 114.63 μM, indicating a decay of 3.6%. This fact indicates that the present system can be useful for the in situ electrochemical generation of hydrogen peroxide.
KW - Activated carbon
KW - Carbon nanotube
KW - Electrochemical generation
KW - Hydrogen peroxide
UR - http://www.scopus.com/inward/record.url?scp=79959297231&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2011.05.002
DO - 10.1016/j.jelechem.2011.05.002
M3 - Article
AN - SCOPUS:79959297231
SN - 1572-6657
VL - 659
SP - 63
EP - 68
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1
ER -