• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Ordered intermetallic Pt-Cu nanoparticles for the catalytic CO oxidation reaction
【24h】

Ordered intermetallic Pt-Cu nanoparticles for the catalytic CO oxidation reaction

机译：有序金属间PT-Cu纳米颗粒用于催化CO氧化反应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Platinum-based intermetallic nanoparticles (NPs), using the abundantly available element copper, with an average particle size of 4-5 nm on a gamma-Al2O3 support were prepared successfully to reduce the consumption of Pt for the removal of CO through the catalytic oxidation reaction from flue gases. Intermetallic Pt-Cu NPs (Pt3Cu, PtCu, and PtCu3) with a Pt loading weight of 5 wt% were prepared on the g-Al2O3 support by a simple wet impregnation method followed by calcination at various temperatures (500-800 C-circle) in a H-2 environment and they were characterized by powder X-ray diffraction analysis (pXRD), high resolution transmission electron microscopy (HR-TEM), selective area electron diffraction (SAED) method, etc. Despite the higher synthesis temperature of these intermetallic NPs, they were not agglomerated and formed a highly ordered intermetallic structure. The surface of the intermetallic Pt-Cu NPs with cubic-type structure (Pt3Cu and PtCu3) is enclosed of {200} facets, regardless of the significant difference in their compositions. Whereas the surface of rhombohedral-type intermetallic PtCu NPs is enclosed of {104} facets. Although the Pt-loading weight of these intermetallic NPs was the same, Pt3Cu NPs showed a stable and enhanced catalytic activity compared to the other intermetallic PtCu and PtCu3 NPs. Pt3Cu NPs showed an onset and maximum conversion temperature of 50 and 125 degrees C, respectively. The intermetallic phase between Pt and Cu of Pt3Cu NPs did not decompose; however, the intermetallic phase did decompose for PtCu and PtCu3 NPs after catalytic CO oxidation. Unlike PtCu and PtCu3 NPs, the Pt3Cu NPs were not agglomerated and they were finely dispersed even after catalytic CO oxidation.
机译：基于铂的金属间纳米颗粒（NP），使用可大量获得的元素铜，对伽马Al2O3载体的4-5纳米的平均粒径成功制备通过催化氧化，以减少铂的消耗用于去除CO的从烟道气中反应。金属间PtCu的NP（Pt3Cu，PtCu和PtCu3），用5％（重量）的Pt负载重量是通过简单的湿浸渍法在G-Al2O3载体制备，接着在不同温度下煅烧（500-800 C-圆）在H-2环境和它们的特征在于粉末X射线衍射分析（PXRD），高分辨透射电子显微镜（HR-TEM），选择区域电子衍射（SAED）法等尽管这些较高的合成温度金属间纳米粒子，他们并没有聚集并形成了高度有序的金属间结构。金属间的Pt-Cu系NP的具有立方型结构（Pt3Cu和PtCu3）表面封闭的{200}面的，而不管在其组合物中的显著差异的。而菱形型金属间PtCu NP的表面被包围{104}面的。虽然这些金属间NP的铂负载量是一样的，Pt3Cu的NP表明相比于其他的金属间PtCu和PtCu3的NP稳定和增强的催化活性。 Pt3Cu的NP显示的50名125度的起病和最大转化温度，分别。 Pt和Pt3Cu NP的铜的金属间相不分解;然而，金属间相催化CO氧化后没有为PtCu和PtCu3纳米颗粒分解。不像PtCu和PtCu3的NP，所述Pt3Cu的NP未附聚和它们即使经过催化氧化CO微细地分散。

著录项

  • 来源
    《RSC Advances》 |2016年第88期|共9页
  • 作者

    Saravanan Govindachetty; Khobragade Rohini; Nagar Laxmi Chand; Labhsetwar Nitin;

  • 作者单位

    CSIR Natl Environm Engn Res Inst CSIR NEERI Nehru Marg Nagpur 440020 Maharashtra India;

    CSIR Natl Environm Engn Res Inst CSIR NEERI Nehru Marg Nagpur 440020 Maharashtra India;

    CSIR Natl Environm Engn Res Inst CSIR NEERI Nehru Marg Nagpur 440020 Maharashtra India;

    CSIR Natl Environm Engn Res Inst CSIR NEERI Nehru Marg Nagpur 440020 Maharashtra India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号