Effect of Ni on PtRu/C Catalyst Performance for Ethanol Electrooxidation in Acidic Medium
Effect of Ni on PtRu/C Catalyst Performance for Ethanol Electrooxidation in Acidic Medium
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DOI：
10.1021/jp800249q
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发表时间：
2008-04
影响因子：
3.7
通讯作者：
Zhen-bo Wang;Pengjian Zuo;Guangjin Wang;C. Du;Geping Yin
中科院分区：
文献类型：
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作者：
Zhen-bo Wang;Pengjian Zuo;Guangjin Wang;C. Du;Geping Yin
本研究旨在提高乙醇电氧化阳极催化剂的利用率和活性。采用化学还原法制备了直接乙醇燃料电池阳极催化剂PtRuNi/C和PtRu/C。采用玻碳圆盘电极，在0.5 mol/L CH 3CH 2 OH和0.5 mol/L H2SO 4溶液中通过循环伏安曲线、计时电流曲线和电流i-t曲线测试了它们的性能。采用X射线衍射（XRD）、X射线能量色散分析（EDAX）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）分别对PtRuNi和PtRu表面颗粒的粒径、晶格常数、成分、微观形貌和金属表面状态进行了表征。XRD分析表明，两种催化剂均为面心立方结构，晶格常数均小于Pt/C催化剂。它们的尺寸相对较小，约为3.0 nm。金属纳米颗粒的尺寸分布..
This research is aimed to improve the utilization and activity of anodic catalysts for ethanol electrooxidation. The direct ethanol fuel cell anodic catalysts, PtRuNi/C and PtRu/C, were prepared by chemical reduction method. Their performances were tested by using a glassy carbon disk electrode through cyclic voltammetric curves, chronoamperometric curves, and amperometric i−t curves in a solution of 0.5 mol/L CH3CH2OH and 0.5 mol/L H2SO4. The particle size, lattice parameter, composition, micro-morphology, and surface states of metals in the PtRuNi and PtRu surface particles were determined by X-ray diffraction (XRD), energy dispersive analysis of X-ray (EDAX) analysis, transmission electron microscopy (TEM), and X-ray photoelectron spectrometry (XPS), respectively. XRD analysis showed that both of the catalysts exhibited face-centered cubic structures and had smaller lattice parameters than did Pt/C catalyst. Their sizes are relatively small, about 3.0 nm. Their size distribution of the metal nanopartic...