X-ray characterization of catalysts

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00:00:00 X-ray characterization of catalysts
00:01:05 Poll
00:01:05 X-ray characterization of catalysts
00:02:28 Poll Answers
00:02:28 Collaboration project
00:04:08 About Malvern Panalytical
00:05:17 Untitled
00:05:33 X-ray technologies
00:06:13 Institute of Materials Chemistry
00:07:01 Supported catalyst materials
00:07:39 Supported catalyst materials
00:08:10 Supported catalyst materials
00:08:44 Case study
00:10:11 Preparation of catalysts
00:11:09 Nano-catalysts
00:12:10 What is of interest?
00:12:47 XRPD: Can we do more?
00:13:59 Thermal stability
00:14:19 Phase identification & quantification
00:15:42 In situ heating
00:16:40 In situ heating
00:17:05 In situ heating
00:17:49 In situ heating
00:18:16 In situ heating
00:18:22 In situ heating
00:19:12 Can we do more?
00:19:26 Which particles to analyze and how?
00:20:24 Particle size analysis
00:20:58 What is Small-angle X-ray scattering (SAXS)?
00:22:11 Particle size analysis: SAXS
00:22:47 Particle size analysis
00:22:52 Non-ambient SAXS
00:23:56 Further characterization of PdO species
00:24:34 Total scattering
00:24:39 What is the PDF?
00:25:12 What is the PDF?
00:26:02 PDF measurements: GaliPIX3D
00:26:54 PDF measurements
00:28:06 PDF: where is PdO?
00:28:46 Taking the difference…
00:29:32 Taking the difference…
00:29:53 Taking the difference…
00:30:41 … comparing with the literature
00:31:39 Summary
00:31:50 Summary
00:32:47 Thank you for your attention!Questions?
00:33:05 Question & Answer SessionUse the Q & A icon and type your question.If listening on demand send your questions to Ask@panalytical.comThank you for attending
00:35:04 What is Small-angle X-ray scattering (SAXS)?
00:35:09 In situ heating
00:35:52 In situ heating
00:36:07 Question & Answer SessionUse the Q & A icon and type your question.If listening on demand send your questions to Ask@panalytical.comThank you for attending
00:36:32 What is Small-angle X-ray scattering (SAXS)?
00:37:06 Which particles to analyze and how?
00:37:44 Question & Answer SessionUse the Q & A icon and type your question.If listening on demand send your questions to Ask@panalytical.comThank you for attending
00:38:06 PDF measurements
00:39:36 Question & Answer SessionUse the Q & A icon and type your question.If listening on demand send your questions to Ask@panalytical.comThank you for attending
00:40:07 Phase identification & quantification
00:43:29 Question & Answer SessionUse the Q & A icon and type your question.If listening on demand send your questions to Ask@panalytical.comThank you for attending

We present a variety of X-ray techniques for a structural characterization of catalysts on the example of automotive three-way catalysts at ambient and non-ambient conditions.

X-ray techniques, such as X-ray diffraction (XRD) and fluorescence (XRF) small-angle X-ray scattering (SAXS) and X-ray scattering in combination with pair distribution function (PDF) analysis are often traditionally assigned to large- scale facilities, like synchrotrons and spallation neutron sources.

We demonstrate, however, that these methods can be combined on laboratory instruments (most of which even on one single XRD platform).

As a model system we present supported PdO nanoparticles on reducible oxides such as Co3O4 and γ-Fe2O3. Parameters and characteristics that can be extracted from the X-ray experiments are:

  • Elemental composition
  • Qualitive and quantitative phase composition
  • Phase behavior and stability (in- situ heating and cooling experiments)
  • Crystallite size and structure
  • Particle size and shape, size distribution, specific surface area
  • Short- and long- range atomic ordering

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