| 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
演講者