期刊
CHEMCATCHEM
卷 11, 期 1, 页码 488-494出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201801378
关键词
scanning transmission X-ray microscopy; atom probe tomography; zeolites; NOX reduction; chemical imaging
资金
- NWO Gravitation program
- Netherlands Center for Multiscale Catalytic Energy Conversion (MCEC)
- European Research Council (ERC) Advanced Grant [321140]
- Marie Sklodowska-Curie Grant [702149]
- China Scholarship Council (CSC)
- U.S. DOE Office of Science User Facility [DE-AC02-05CH11231]
- U.S. Department of Energy [DE-AC05-00OR22725]
- Marie Curie Actions (MSCA) [702149] Funding Source: Marie Curie Actions (MSCA)
Characterizing materials at nanoscale resolution to provide new insights into structure property performance relationships continues to be a challenging research target due to the inherently low signal from small sample volumes, and is even more difficult for nonconductive materials, such as zeolites. Herein, we present the characterization of a single Cu-exchanged zeolite crystal, namely Cu-SSZ-13, used for NOX reduction in automotive emissions, that was subject to a simulated 135,000-mile aging. By correlating Atom Probe Tomography (APT), a single atom microscopy method, and Scanning Transmission X-ray Microscopy (STXM), which produces high spatial resolution X-ray Absorption Near Edge Spectroscopy (XANES) maps, we show that a spatially non-uniform proportion of the Al was removed from the zeolite framework. The techniques reveal that this degradation is heterogeneous at length scales from micrometers to tens of nanometers, providing complementary insight into the long-term deactivation of this catalyst system.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据