...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>New Journal of Chemistry >Surfactant-free fabrication of porous PdSn alloy networks by self-assembly as superior freestanding electrocatalysts for formic acid oxidation
【24h】

Surfactant-free fabrication of porous PdSn alloy networks by self-assembly as superior freestanding electrocatalysts for formic acid oxidation

机译：通过自组装自由组装的表面活性剂的制造作为甲酸氧化的高级独立式电催化剂

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

The fine design of three-dimensional (3D) nanocatalysts has attracted great research interest, particularly in fuel cells. In this paper, 3D porous PdSn alloy networks were successfully synthesized for the first time at 60 degrees C by a facile self-assembly method without using any surfactants. Through comprehensive physical characterization, the formation of a porous network structure with an average diameter of 7 nm was confirmed. The as-prepared PdSn alloy networks exhibited greatly enhanced catalytic performance towards formic acid oxidation (FAO) compared to Pd/C, which could be ascribed to their self-supported network nanostructure, the multifunctional effect between Pd and Sn and the particularly "clean" surface. Also, the widespread amorphous SnO2 greatly enhanced the stability of the network catalysts. Among the three different atomic ratios of PdSn networks, the Pd2Sn1 sample exhibited the highest peak current density (1.35 A mg(pd)(-1)), which was 2.3-fold higher than that of Pd/C. After chronoamperometric testing for 3600 s, the Pd2Sn1 networks still showed the highest mass activity (0.16 A mg(pd)(-1)), which was 16-fold higher than that of Pd/C. Furthermore, the Pd2Sn1 catalyst displayed the best performance for FAO among all reported PdSn network catalysts. Therefore, after surface electron and geometry modification, the as-obtained PdSn alloy networks can be applied as state-of-the-art electrocatalysts for direct formic acid fuel cells.
机译：三维（3D）纳米催化剂的精细设计引起了巨大的研究兴趣，特别是在燃料电池中。在本文中，在不使用任何表面活性剂的情况下，通过容易自组装方法在60℃下成功地合成3D多孔Pdsn合金网络。通过全面的物理表征，确认平均直径为7nm的多孔网络结构的形成。与PD / C相比，AS制备的PDSN合金网络对甲酸氧化（粮农组织）的催化性能大大提高了抗甲酸氧化（粮农组织），这可以归因于其自支持的网络纳米结构，PD和SN之间的多功能效应以及特别是“清洁”之间的多功能效应表面。而且，广泛的非晶SnO2大大提高了网络催化剂的稳定性。在PDSN网络的三种不同原子比中，PD2SN1样品表现出最高峰值电流密度（1.35A Mg（Pd）（ - 1）），其比Pd / C高2.3倍。在3600秒的时间计量检测之后，PD2SN1网络仍显示出质量最高（0.16毫克（Pd）（ - 1）），其比Pd / C高16倍。此外，PD2SN1催化剂在所有报告的PDSN网络催化剂中显示出粮农组织的最佳性能。因此，在表面电子和几何修改之后，可以将AS获得的PDSN合金网络应用于用于直接甲酸燃料电池的最先进的电催化剂。

著录项

  • 来源
    《New Journal of Chemistry》 |2019年第48期|共11页
  • 作者

    Qin Qian; Xie Jian; Dong Qizhi; Yu Gang; Chen Hong;

  • 作者单位

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chemo Biosensing &

    Chemometr Changsha 410082 Peoples R China;

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chemo Biosensing &

    Chemometr Changsha 410082 Peoples R China;

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chemo Biosensing &

    Chemometr Changsha 410082 Peoples R China;

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chemo Biosensing &

    Chemometr Changsha 410082 Peoples R China;

    Foshan Univ Sch Mat Sci &

    Energy Engn Foshan 528000 Guangdong Peoples R China;

  • 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