...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >Mass transfer effects in CO2 reduction on Cu nanowire electrocatalysts
【24h】

Mass transfer effects in CO2 reduction on Cu nanowire electrocatalysts

机译：在二氧化碳还原铜传质效果纳米线electrocatalysts

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

Significant interest has risen in the development of catalytic nanomaterials for the electroreduction of CO2. While extensive studies have been reported on tuning of surface structures to improve the chemical kinetics, less attention has been paid to the mass transfer effects in the CO2 reduction reaction on nanoscale electrocatalysts. We report here a systematic investigation of CO2 electroreduction on highly dense Cu nanowires, with the focus placed on practically relevant high-flux conditions. Mass transfer effects are found to play an important role in this case, giving rise to diffusion-limited CO2 reduction activity and selectivity. By correlating the observed transport phenomena to the CO2 conversion rate calculated from the experimental data and the surface concentration of CO2 on the nanowires derived from transport modeling, an upper limit is revealed for the CO2 conversion rate on the nanostructured electrodes, which also causes the drop in Faradaic efficiency of CO2 reduction at large current densities. Our work emphasizes the necessity of considering mass transfer effects in the design of advanced electrocatalysts for CO2 reduction as well as for understanding their structure-performance relationships.
机译：重要的兴趣上升发展的催化纳米材料电解还原的二氧化碳。已报告在调优的表面结构来提高化学动力学,更少一直注意传质在二氧化碳还原反应的影响纳米electrocatalysts。二氧化碳电解还原系统的调查在高度密集的铜纳米线,专注实际上放在相关的高通量条件。发挥重要作用在这种情况下,上升扩散限制二氧化碳和减少活动选择性。迁移现象的二氧化碳转化率从实验数据和计算在纳米线表面浓度的二氧化碳来自交通建模、一个上限是显示的二氧化碳转化率纳米电极,这也导致感应电流的减少二氧化碳的效率下降大电流密度。在考虑传质影响的必要性先进的二氧化碳electrocatalysts的设计减少以及了解他们结构性能的关系。

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