کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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59569 | 1419439 | 2014 | 6 صفحه PDF | دانلود رایگان |
This work describes the promising activity of silver nanoparticles on the surface of a poly(2-amino diphenylamine) modified carbon paste electrode (CPE) towards formaldehyde oxidation. Electrodeposition of the conducting polymer film on the CPE was carried out using consecutive cyclic voltammetry in an aqueous solution of 2-aminodiphenylamine and HCl. Nitrogen groups in the polymer backbone had a Ag ion accumulating effect, allowing Ag nanoparticles to be electrochemically deposited on the surface of the electrode. The electrochemical and morphological characteristics of the modified electrode were investigated. The electro-oxidation of formaldehyde on the surface of electrode was studied using cyclic voltammetry and chronoamperometry in aqueous solution of 0.1 mol/L NaOH. The electro-oxidation onset potential was found to be around −0.4 V, which is unique in the literature. The effect of different concentrations of formaldehyde on the electrocatalytic activity of the modified electrode was investigated. Finally, the diffusion coefficient of formaldehyde in alkaline media was calculated to be 0.47 × 10−6 cm2/s using chronoamperometry.
Graphical AbstractAg nanoparticles were incorporated on poly-2ADPA modified carbon paste electrode and their electrochemical behavior in alkaline media was investigated. The Ag nanoparticles exhibited promising electrocatalytic activity for formaldehyde oxidation.Figure optionsDownload as PowerPoint slide
Journal: Chinese Journal of Catalysis - Volume 35, Issue 9, September 2014, Pages 1565–1570