High performance rare earth oxides LnOx(Ln = Sc, Y, La, Ce, Pr and Nd) modified Pt/C electrocatalysts for methanol electrooxidation | |
Tang ZC(唐志诚)![]() ![]() | |
刊名 | Journal of Power Sources
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2006 | |
卷号 | 162期号:2页码:1067–1072 |
关键词 | Methanol electrooxidation Direct methanol fuel cell Rare earth oxides Electrochemical properties Electrocatalytic reaction Electrocatalyst |
ISSN号 | 0378-7753 |
通讯作者 | 吕功煊 |
中文摘要 | In this paper, the LnOx (Ln = Sc, Y, La, Ce, Pr and Nd) modified Pt/C catalysts were prepared by wet precipitation and reduction method. The catalysts were characterized by transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD). TEM showed that the Pt-PrOx nanoparticles were uniformly dispersed on carbon with an average particle size of 5.0 nm in the Pt3-(PrOx)1/C catalyst. EDX showed that Pt and Pr were successfully loaded on the carbon support without obvious loss. XRD showed that all the Pt/C and LnOx modified Pt/C electrocatalysts (except for the Pt3-(ScOx)1/C electrocatalyst) displayed the typical character of Pt face centered cubic (fcc) phase, whereas the Pt3-(ScOx)1/C electrocatalyst contained the diffraction pattern of Pt face centered cubic and Sc2O3 phase. LnOx modified Pt/C electrocatalysts were compared with Pt/C in terms of the electrochemical activity and stability for methanol electrooxidation using cyclic voltammetry (CV) and chronoamperometry (CA) in 0.5M H2SO4 + 0.5M CH3OH solutions. The results showed that all the LnOx (except for NdOx) modified the Pt/C electrocatalysts gave higher catalytic activity and stability than Pt/C. In particular, the Pt3-(PrOx)1/C eloctrocatalyst was found to be superior than others. Under this respect, several Pt-PrOx/C catalysts with different atomic ratio of Pt/Pr were also identically prepared and characterized. It was found by CV and CA that the Pt3-(PrOx)1/C and Pt1-(PrOx)1/C catalysts showed better catalytic activity and stability than the Pt5-(PrOx)1/C, Pt1-(PrOx)3/C and Pt/C catalysts. The Pt3-(PrOx)1/C and Pt1-(PrOx)1/C catalysts had high catalytic activity and good stability, which could be used as novel electrocatalysts for direct methanol fuel cell. |
收录类别 | SCI |
语种 | 英语 |
公开日期 | 2013-12-02 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/4246] ![]() |
专题 | 兰州化学物理研究所_ERC国家工程研究中心 兰州化学物理研究所_OSSO国家重点实验室 |
推荐引用方式 GB/T 7714 | Tang ZC,Lv GX. High performance rare earth oxides LnOx(Ln = Sc, Y, La, Ce, Pr and Nd) modified Pt/C electrocatalysts for methanol electrooxidation[J]. Journal of Power Sources,2006,162(2):1067–1072. |
APA | Tang ZC,&Lv GX.(2006).High performance rare earth oxides LnOx(Ln = Sc, Y, La, Ce, Pr and Nd) modified Pt/C electrocatalysts for methanol electrooxidation.Journal of Power Sources,162(2),1067–1072. |
MLA | Tang ZC,et al."High performance rare earth oxides LnOx(Ln = Sc, Y, La, Ce, Pr and Nd) modified Pt/C electrocatalysts for methanol electrooxidation".Journal of Power Sources 162.2(2006):1067–1072. |
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