...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electrocatalysis >Synthesis and Characterization of Palladium-Platinum Core-Shell Electrocatalysts for Oxygen Reduction
【24h】

Synthesis and Characterization of Palladium-Platinum Core-Shell Electrocatalysts for Oxygen Reduction

机译：钯-铂核壳氧还原催化剂的合成与表征

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

Core-shell materials can be employed in low-temperature fuel cell technology as an active electrocatalyst to enable a decreased loading of Pt while still providing sufficient current density. Traditional synthesis of a core-shell material, however, is very sensitive to batch size, with larger batches often exhibiting much lower activity than small-scale batches. To understand this phenomenon for a Pt monolayer deposited on a carbon-supported Pd material, a synchrotron-based X-ray diffraction technique that utilized the ability of Pd to absorb hydrogen to form a Pd hydride structure was developed. The formation of an interstitial hydride causes a large increase in the Pd lattice constant, while the Pt lattice remains unchanged. This can allow deconvolution of the X-ray diffraction reflections of Pt ML/Pd/C into contributions from Pd and Pt. Results of this technique along with synthesis conditions that result in improved electrocatalytic materials for larger batch sizes are discussed.
机译：核-壳材料可在低温燃料电池技术中用作活性电催化剂，以降低Pt的负载量，同时仍提供足够的电流密度。然而，核-壳材料的传统合成对批次大小非常敏感，较大的批次通常表现出比小批量低得多的活性。为了理解对于沉积在碳负载的Pd材料上的Pt单层膜的这种现象，开发了利用Pd吸收氢形成Pd氢化物结构的能力的基于同步加速器的X射线衍射技术。间隙氢化物的形成导致Pd晶格常数大大增加，而Pt晶格保持不变。这可以允许将Pt ML / Pd / C的X射线衍射反射解卷积为Pd和Pt的贡献。讨论了该技术的结果以及合成条件，这些条件可为较大的批量生产提供改进的电催化材料。

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