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Nanoscale tomography reveals the deactivation of automotive copper-exchanged zeolite catalysts

Author

Listed:
  • Joel E. Schmidt

    (Utrecht University, Universiteitsweg 99)

  • Ramon Oord

    (Utrecht University, Universiteitsweg 99)

  • Wei Guo

    (Oak Ridge National Laboratory)

  • Jonathan D. Poplawsky

    (Oak Ridge National Laboratory)

  • Bert M. Weckhuysen

    (Utrecht University, Universiteitsweg 99)

Abstract

Copper-exchanged zeolite chabazite (Cu-SSZ-13) was recently commercialized for the selective catalytic reduction of NO X with ammonia in vehicle emissions as it exhibits superior reaction performance and stability compared to all other catalysts, notably Cu-ZSM-5. Herein, the 3D distributions of Cu as well as framework elements (Al, O, Si) in both fresh and aged Cu-SSZ-13 and Cu-ZSM-5 are determined with nanometer resolution using atom probe tomography (APT), and correlated with catalytic activity and other characterizations. Both fresh catalysts contain a heterogeneous Cu distribution, which is only identified due to the single atom sensitivity of APT. After the industry standard 135,000 mile simulation, Cu-SSZ-13 shows Cu and Al clustering, whereas Cu-ZSM-5 is characterized by severe Cu and Al aggregation into a copper aluminate phase (CuAl2O4 spinel). The application of APT as a sensitive and local characterization method provides identification of nanometer scale heterogeneities that lead to catalytic activity and material deactivation.

Suggested Citation

  • Joel E. Schmidt & Ramon Oord & Wei Guo & Jonathan D. Poplawsky & Bert M. Weckhuysen, 2017. "Nanoscale tomography reveals the deactivation of automotive copper-exchanged zeolite catalysts," Nature Communications, Nature, vol. 8(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01765-0
    DOI: 10.1038/s41467-017-01765-0
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    Cited by:

    1. Wenyan Zheng & Zhuo Wang & Weilin Chen & Mengchao Zhang & Hui Li & Guang Yang & Qiang Xu & Xvsheng Qiao & Dezhi Tan & Junjie Zhang & Jianrong Qiu & Guodong Qian & Xianping Fan, 2024. "Unlocking high photosensitivity direct laser writing and observing atomic clustering in glass," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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