欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用化学还原和热处理方法对商业PtRu/C催化剂进行稀土Eu掺杂,制备了不同Eu含量的PtRuEux/C催化剂.透射电子显微镜（TEM）、X射线能量色散光谱（EDX）、X射线衍射（XRD）和X射线光电子能谱（XPS）等方法表征催化剂的结果表明,Eu的掺杂未改变PtRu/C催化剂的平均粒径（约为3nm）,并且Eu以金属和氧化物两种形态修饰PtRu表面.循环伏安和计时电流法测试显示,PtRuEux/C催化剂较商业PtRu/C对甲醇氧化具有更高的活性,其中PtRuEu0.3/C的活性最高.运用原位傅里叶变换红外（FTIR）光谱从分子水平研究了该催化剂对甲醇电催化氧化的反应过程,检测到甲醇在催化剂上解离吸附的吸附态产物是线型吸附态CO（COL）,Eu的掺杂使COL的氧化电位降低,明显提高了催化剂的活性和抗CO毒化的能力.
英文摘要：
Commercially available PtRu/C catalyst was doped with Eu by chemical reduction and sintering,resulting in PtRuEux/C catalysts with different Eu contents.The catalysts were characterized by transmission electron microscopy（TEM）,energy dispersive X-ray（EDX） spectroscopy,X-ray diffraction（XRD）,and X-ray photoelectron spectroscopy（XPS）.Results showed that Eu doping did not change the average size of the PtRu/C catalysts（ca 3 nm）,and their surfaces were modified by both Eu metal and oxide.Cyclic voltammetry and chronoamperometry demonstrated that the activity of the PtRuEux/C catalysts was higher than that of commercial PtRu/C for methanol electrooxidation.Among the PtRuEux/C catalysts,PtRuEu0.3/C exhibited the best performance.The electrocatalytic oxidation of methanol on the catalyst was further investigated by in situ Fourier transform infrared（FTIR） spectroscopy at molecular level.Results indicated that the adsorbed species derived from the dissociative adsorption of methanol on the catalysts were linear-bonded CO（COL）.Eu doping decreased the oxidation potential of COL and thus significantly enhanced the activity of the catalysts and their tolerance to CO.
同期刊论文项目
同项目期刊论文
Infrared Spectroelectrochemical Study of Dissociation and Oxidation of Methanol at Palladium Electro
The potential of zero total charge of Pt nanoparticles and polycrystalline electrodes with different
Crystal Habit-Tuned Nanoplate Material of Li[Li(1/3-2x/3)Ni(x)Mn(2/3-x/3)]O(2) for High-Rate Perform
Molecular dynamics investigation of structural evolution of fcc Fe nanoparticles under heating proce
High-Index Faceted Platinum Nanocrystals Supported on Carbon Black as Highly Efficient Catalysts for
Electrodeposition of Copper in a Citrate Bath and Its Application to a Micro-Electro-Mechanical Syst
Specific reactivity of step sites towards CO adsorption and oxidation on platinum single crystals vi
Exploring Electrosorption at Iron Electrode with in Situ Surface-Enhanced Infrared Absorption Spectr
Electrochemically Induced Free-Radical Polymerization for the Fabrication of Amperometric Glucose Bi
Effects of nickel ion contents on electrodeposition, composition, structure and properties of pallad
Electrochemically Induced Free Radical Polymerization of Methacrylic Acid and Fabrication of Amperom
XPS, time-of-flight-SIMS and polarization modulation IRRAS study of Cr2O3 thin film materials as ano
Structure and electrochemical performance of nanostructured Sn-Co alloy/carbon nanotube composites a
QCM and EC-SPR Studies of Cytochrome c Self-assembled on Au Electrode and the Enhancement of SPR Sig
Tetrahexahedral Pt nanocrystal catalysts decorated with Ru adatoms and their enhanced activity in me
Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li-
In situ FTIR spectroscopic studies of ethylene glycol electrooxidation on Pd electrode in alkaline s
Effects of iron ion contents on composition, morphology, structure and properties of chromium coatin
期刊信息
位置：