Characterization of Argon Glow Discharge Plasma Reduced Pt/Al2O3 Catalyst
Characterization of Argon Glow Discharge Plasma Reduced Pt/Al2O3 Catalyst
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DOI：
10.1021/ie060735y
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发表时间：
2006-11
影响因子：
4.2
通讯作者：
Xinli Zhu;P. Huo;Yue-ping Zhang;Chang-jun Liu
中科院分区：
文献类型：
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作者：
Xinli Zhu;P. Huo;Yue-ping Zhang;Chang-jun Liu
在室温下，使用氩气辉光放电等离子体处理 H2PtCl6 浸渍的 Al2O3 粉末。通过紫外可见光谱（UV-vis）、X射线光电子能谱（XPS）、CO吸附漫反射傅里叶变换红外（DRIFT）光谱、X射线粉末衍射（XRD）和配备能量色散X射线光谱仪（EDX）的透射电子显微镜（TEM）对所得样品进行了表征。 UV-vis、XPS 和 CO 吸附 DRIFT 证实 Pt 离子在等离子体处理过程中被还原为金属 Pt。 XRD和TEM表明等离子体还原的Pt纳米颗粒的结构为面心立方。 Pt颗粒形状不规则，但均匀分布在Al2O3上。通过 TEM 估计，等离子体还原的 3 wt% Pt/Al2O3 的平均粒径为 3.3 nm。对于甲烷的部分氧化，等离子体还原的 0.5 wt% Pt/Al2O3 显示出与传统氢还原样品相当的活性。此外，等离子体还还原了 0.5 wt% Pt/Al2O3 样品...
An argon glow discharge plasma was used to treat H2PtCl6 impregnated Al2O3 powder at room temperature. The obtained sample was characterized by ultraviolet−visible spectroscopy (UV−vis), X-ray photoelectron spectroscopy (XPS), CO adsorbed diffuse reflectance Fourier transform infrared (DRIFT) spectroscopy, X-ray powder diffraction (XRD), and transmission electron microscopy (TEM) equipped with energy dispersion X-ray spectrometer (EDX). UV−vis, XPS, and CO adsorbed DRIFT confirmed that Pt ions were reduced to metallic Pt during the plasma treatment. XRD and TEM revealed that the structure of the plasma reduced Pt nanoparticles is face centered cubic. The Pt particle shape is irregular but uniformly distributed on the Al2O3. The average particle size of plasma reduced 3 wt % Pt/Al2O3 is 3.3 nm, estimated by TEM. For the partial oxidation of methane, the plasma reduced 0.5 wt % Pt/Al2O3 shows comparable activity to a conventional hydrogen reduced sample. Furthermore, the plasma reduced 0.5 wt % Pt/Al2O3 sam...