...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >CO tolerance of Pt and PtSn intermetallic electrocatalysts on synthetically modified reduced graphene oxide supports
【24h】

CO tolerance of Pt and PtSn intermetallic electrocatalysts on synthetically modified reduced graphene oxide supports

机译：合成改性的还原氧化石墨烯载体上Pt和PtSn金属间电催化剂的CO耐受性

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

Pt and PtSn intermetallic nanoparticle (NP) catalysts were grown directly on various reduced graphene (rGO) supports and were characterized by a combination of X-ray photoelectron spectroscopic (XPS), Raman microscopy, transmission electron microscopy (TEM), and powder X-ray diffraction (XRD) studies. Electrochemical CO stripping and rotating disk electrochemical (RDE) experiments showed the four rGO-PtSn catalysts to be superior to the four rGO-Pt catalysts for CO and CO-H-2 electrooxidation in acidic solutions regardless of the rGO support, in agreement with earlier reports on PtSn NP electrocatalysts. For the four rGO-Pt catalysts, the rGO support causes a 70 mV spread in CO oxidation peak potential (Delta E-peak) and a 200 mV spread in CO-H-2 electrooxidation onset. The more oxygenated graphenes show the lowest CO oxidation potentials and the best CO tolerance. For the four rGO-PtSn intermetallic catalysts, a similar to 160 mV spread in CO-H-2 electrooxidation onset is observed. With the exception of the nitrogen-doped graphene (NGO), a similar trend in enhanced CO electrooxidation properties with increasing oxygen content in the rGO support is observed. The NGO-PtSn electrocatalyst was superior to the other rGO-PtSn catalysts and showed the largest improvement in CO tolerance relative to the pure Pt system. The origin of this enhancement appears to stem from the unique rGO-PtSn support interaction in this system. These results are discussed in the context of recent theoretical and experimental studies in the literature.
机译：Pt和PtSn金属间纳米粒子（NP）催化剂直接在各种还原石墨烯（rGO）载体上生长，并通过X射线光电子能谱（XPS），拉曼显微镜，透射电子显微镜（TEM）和粉末X-射线衍射（XRD）研究。电化学CO汽提和转盘电化学（RDE）实验表明，不管rGO支持如何，在酸性溶液中进行CO和CO-H-2电氧化时，四种rGO-PtSn催化剂均优于四种rGO-PtSn催化剂，这与早期的实验方法一致关于PtSn NP电催化剂的报道。对于四种rGO-Pt催化剂，rGO载体在CO氧化峰电位（ΔE峰）中引起70 mV的扩散，在CO-H-2电氧化开始时引起200 mV的扩散。含氧量更高的石墨烯显示出最低的CO氧化电位和最佳的CO耐受性。对于四种rGO-PtSn金属间催化剂，在CO-H-2电氧化反应开始时观察到的扩散类似于160 mV。除了掺杂氮的石墨烯（NGO），在rGO载体中，随着氧含量的增加，CO氧化性能增强的趋势相似。 NGO-PtSn电催化剂优于其他rGO-PtSn催化剂，相对于纯Pt系统，其CO耐受性改善最大。此增强功能的起源似乎源于该系统中独特的rGO-PtSn支持交互作用。这些结果是在最近的文献理论和实验研究的背景下讨论的。

著录项

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