TY - JOUR
T1 - Electro-catalytic oxidation of methane at multi-walled carbon nanotubes-Nafion/nickel hydroxide modified nickel electrode
AU - Qiao, Jie
AU - Tang, Shengnan
AU - Tian, Yanni
AU - Shuang, Shaomin
AU - Dong, Chuan
AU - Choi, Martin M.F.
N1 - Funding Information:
This work is supported by the Key Project of National Natural Science Foundation of China (50534100) and the Shanxi Province Graduate Student Innovative Plan (07010700).
PY - 2009/5/6
Y1 - 2009/5/6
N2 - A novel chemical modified nickel (Ni) electrode based on multi-walled carbon nanotubes (MWCNTs), Nafion film and nickel hydroxide has been successfully fabricated for methane (CH4) detection at ambient conditions. The morphology of the MWCNTs-Nafion/Ni(OH)2 film was characterized by transmission electron microscopy and the electrochemical properties of the Ni modified electrode were studied by cyclic voltammetry. The MWCNTs-Nafion/Ni(OH)2-Ni electrode showed good catalytic effect on the oxidation of CH4 in 1.0 M NaOH. In addition, the modified electrode was free from nitrogen and oxygen interferences. When differential pulse voltammetry was applied to the MWCNTs-Nafion/Ni(OH)2-Ni electrode, a good linear relationship between the oxidation peak current (i) and CH4 concentration (Cmethane) was obtained: i = 1.841Cmethane + 46.25, where i is in μA and Cmethane is in 0.0-16.0% (v/v). The relative standard deviation for detection of 3.0% (v/v) CH4 was 1.80% (n = 5). The proposed Ni modified electrode is anticipated to provide a promising technique to detect CH4 at ambient conditions.
AB - A novel chemical modified nickel (Ni) electrode based on multi-walled carbon nanotubes (MWCNTs), Nafion film and nickel hydroxide has been successfully fabricated for methane (CH4) detection at ambient conditions. The morphology of the MWCNTs-Nafion/Ni(OH)2 film was characterized by transmission electron microscopy and the electrochemical properties of the Ni modified electrode were studied by cyclic voltammetry. The MWCNTs-Nafion/Ni(OH)2-Ni electrode showed good catalytic effect on the oxidation of CH4 in 1.0 M NaOH. In addition, the modified electrode was free from nitrogen and oxygen interferences. When differential pulse voltammetry was applied to the MWCNTs-Nafion/Ni(OH)2-Ni electrode, a good linear relationship between the oxidation peak current (i) and CH4 concentration (Cmethane) was obtained: i = 1.841Cmethane + 46.25, where i is in μA and Cmethane is in 0.0-16.0% (v/v). The relative standard deviation for detection of 3.0% (v/v) CH4 was 1.80% (n = 5). The proposed Ni modified electrode is anticipated to provide a promising technique to detect CH4 at ambient conditions.
KW - Methane
KW - Multi-walled carbon nanotubes
KW - Nafion
KW - Nickel modified electrode
UR - http://www.scopus.com/inward/record.url?scp=64549106477&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2009.02.065
DO - 10.1016/j.snb.2009.02.065
M3 - Journal article
AN - SCOPUS:64549106477
SN - 0925-4005
VL - 138
SP - 402
EP - 407
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
IS - 2
ER -