Preparation of Pt/multiwalled carbon nanotubes modified Au electrodes via Pt–Cu co-electrodeposition/Cu stripping protocol for high-performance electrocatalytic oxidation of methanol
Preparation of Pt/multiwalled carbon nanotubes modified Au electrodes via Pt–Cu co-electrodeposition/Cu stripping protocol for high-performance electrocatalytic oxidation of methanol
复制标题
DOI：
10.1016/j.matchemphys.2009.08.006
复制
发表时间：
2009-12
影响因子：
4.6
通讯作者：
Jinhua Huang;Q. Xie;Yueming Tan;Yingchun Fu;Zhaohong Su;Y. Huang;S. Yao
中科院分区：
文献类型：
--
作者：
Jinhua Huang;Q. Xie;Yueming Tan;Yingchun Fu;Zhaohong Su;Y. Huang;S. Yao
Pt nanoparticles well dispersed on multiwalled carbon nanotubes (MWCNTs) were prepared for high-performance electrocatalytic oxidation of methanol in both acidic and alkaline media via the co-electrodeposition/stripping (CS) protocol, namely, co-electrodeposition of Pt and Cu followed by electrochemical stripping of Cu, as examined by cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The Pt catalyst prepared by the CS protocol on MWCNTs (Ptcs/MWCNTs/Au) exhibited a specific electrocatalytic activity of 519 and 2210Ag−1toward cyclic voltammetric electrooxidation (50mVs−1) of methanol in 0.5M CH3OH+0.5M H2SO4and 0.5M CH3OH+1.0M NaOH media, respectively, which are larger than those prepared by conventional electrodeposition from chloroplatinic acid on Au and MWCNTs/Au, as well as that by a CS protocol on Au. The Ptcs/MWCNTs/Au electrode also possessed the highest stability, which maintained 91% and 90% of its initial catalytic activity after 120-cycle CV in 0.5M CH3OH+0.5M H2SO4and 0.5M CH3OH+1.0M NaOH, respectively. The electrode kinetics of methanol oxidation is also briefly discussed. The nanosubstrate-based CS protocol is simple, convenient and efficient, which is expected to find wide applications in film electrochemistry and electrocatalysis.
