物理化学学报 >> 2009, Vol. 25 >> Issue (10): 2050-2054.doi: 10.3866/PKU.WHXB20091012

研究论文 上一篇    下一篇

多孔聚乙酰苯胺纳米纤维载铂催化剂对甲醇的电催化氧化

赵彦春, 兰黄鲜, 田建袅, 杨秀林, 王凤阳   

  1. 广西师范大学化学化工学院, 药用资源化学与药物分子工程教育部重点实验室, 广西 桂林 541004
  • 收稿日期:2009-04-12 修回日期:2009-06-29 发布日期:2009-09-29
  • 通讯作者: 赵彦春 E-mail:yanchunzh@yahoo.cn

Electrocatalytic Oxidation of Methanol on Pt Nanoparticles Supported on Porous Poly(N-acetylaniline) Nanofibrils

ZHAO Yan-Chun, LAN Huang-Xian, TIAN Jian-Niao, YANG Xiu-Lin, WANG Feng-Yang   

  1. Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources of the Ministry of Education of China, College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi Province, P. R. China
  • Received:2009-04-12 Revised:2009-06-29 Published:2009-09-29
  • Contact: ZHAO Yan-Chun E-mail:yanchunzh@yahoo.cn

摘要:

采用简单的化学氧化聚合法制备了新型多孔结构的聚乙酰苯胺纳米纤维(np-PAANI), 并以此为载体在络合剂的存在下合成了Pt纳米微粒修饰的np-PAANI复合物膜电极C/np-PAANI/Pt. 样品的形貌和结构通过扫描电镜(SEM)、透射电镜(TEM)和X射线衍射(XRD)进行了表征. 在0.5 mol·L-1 CH3OH+0.5 mol·L-1 H2SO4混合溶液中考察了C/np-PAANI/Pt催化剂对甲醇的电催化氧化性能. 结果表明, 以np-PAANI负载的Pt催化剂对甲醇的电催化氧化活性和稳定性都比普通PAANI结构及石墨粉负载的Pt催化剂好很多.

关键词: 聚N-乙酰苯胺, 铂微粒, 多孔结构, 甲醇, 电催化氧化

Abstract:

A novel nanoporous poly(N-acetylaniline) (np-PAANI) film with a network structure modified with Pt nanoparticles (C/np-PAANI/Pt) was fabricated using chemical oxidation polymerization and a reduction method. The morphology and composition of the final products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The electrocatalytic activity of C/np-PAANI/Pt towards the oxidation of methanol was investigated using cyclic voltammetry and chronoamperometric methods in 0.5 mol·L-1 CH3OH+0.5 mol·L-1 H2SO4 mixture solution. Results indicated that C/np-PAANI/Pt catalysts exhibited improved electrocatalytic activity, anti-poisoning ability, and good stability towards methanol oxidation by comparison to C/PAANI/Pt or C/Pt.

Key words: Poly(N-acetylaniline), Pt particles, Nanoporous structure, Methanol, Electrocatalytic oxidation

MSC2000: 

  • O643