铂粒子修饰单壁碳纳米管/聚苯胺复合膜对甲醛的电催化氧化

在溶有单壁碳纳米管(SWNTs)的苯胺溶液中, 通过电化学共聚合法成功制备了单壁碳纳米管(SWNT)/聚苯胺(PANI)复合膜. 用电沉积法将铂沉积到SWNT/PANI复合膜上. 样品的成分和形貌分别用XRD和SEM表征. 四探针和电化学交流阻抗的研究表明被PANI包裹的SWNTs整齐地排列在复合膜中, 从而提高了复合膜的电导率, 促进了电荷转移. 循环伏安(CV)说明Pt修饰的SWNT/PANI复合膜对于甲醛氧化具有良好的电催化活性及稳定性. 研究结果表明SWNT/PANI复合膜是一种非常好的催化剂载体, 有着广泛的应用前景.

Electrocatalytic Oxidation of Formaldehyde on SWNT/PANI Composite Film Modified by Platinum Particles

Single-walled carbon nanotubes (SWNT)/polyaniline (PANI) composite films with good uni- formity and dispersion were prepared by electrochemical copolymerization of aniline containing well- dissolved SWNTs. Pt was dispersed on the composite films by electrodeposition technique. The presence of SWNTs and platinum in the composite film was confirmed by XRD analysis and scanning electron micros- copy (SEM). Four-point probe investigations and electrochemical impedance spectroscopys (EIS) revealed that the well arrangement of PANI coated SWNTs in these films enhanced electric conductivity and facili- tated the charge-transfer of the composite films. Cyclic voltammograms (CV) and chronoamperogram showed that Pt-modified SWNT/PANI composite film performed higher electrocatalytic activity and better long-term stability than Pt-modified pure PANI film toward formaldehyde oxidation. The results imply that the SWNT/PANI composite film as a promising support material improves the electrocatalytic activity for formaldehyde oxidation greatly.