Nanoscale Chemical Imaging of an Individual Catalyst Particle with Soft X-ray Ptychography

Wise, Anna M.; Weker, Johanna Nelson; Kalirai, Sam; Farmand, Maryam; Shapiro, David A.; Meirer, Florian; Weckhuysen, Bert M.

doi:10.1021/acscatal.6b00221

Title: Nanoscale Chemical Imaging of an Individual Catalyst Particle with Soft X-ray Ptychography

Journal Article · Fri Apr 01 00:00:00 EDT 2016 · ACS Catalysis

DOI:https://doi.org/10.1021/acscatal.6b00221· OSTI ID:1242441

Wise, Anna M.; Weker, Johanna Nelson; Kalirai, Sam; Farmand, Maryam; Shapiro, David A.; Meirer, Florian; Weckhuysen, Bert M.

Understanding Fe deposition in fluid catalytic cracking (FCC) catalysis is critical for the mitigation of catalyst degradation. We employ soft X-ray ptychography to determine at the nanoscale the distribution and chemical state of Fe in an aged FCC catalyst particle. We also show that both particle swelling due to colloidal Fe deposition and Fe penetration into the matrix as a result of precracking of large organic molecules occur. Furthermore, the application of ptychography allowed us to provide direct visual evidence for these two distinct Fe-based deactivation mechanisms, which have so far been proposed only on the basis of indirect evidence.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231; AC02-76SF00515

OSTI ID:: 1242441

Alternate ID(s):: OSTI ID: 1379261

Journal Information:: ACS Catalysis, Journal Name: ACS Catalysis Vol. 6; ISSN 2155-5435

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 62 works

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
fluid catalytic cracking
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iron and soft X-ray ptychography

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