Pair Distribution Function (PDF) Block Allocation Group (BAG) access at Diamond

When: 7 February, 15:00 GMT

The UK Catalysis Hub has been awarded Block Allocation Group (BAG) access to the I15 X-ray PDF beamline at the Diamond Light Source. Pair Distribution Function (PDF) or total scattering analysis provides information on the local atomic arrangement of crystalline, nanophase, disordered, amorphous and liquid materials over an extended distance range as is extremely complementary to element specific probes such as X-ray absorption spectroscopy (XAS). The XPDF BAG will used the same framework and support that has been established for the successful XAS BAG at B18 and has similar goals; to develop a group of experienced users from within the UK Catalysis community who will apply PDF analysis to new areas of catalysis science. As with XAS, there will be opportunities for ex situin situ and operando experiments. 

Total scattering (PDF analysis) is becoming an important tool in the study of a wide range or materials including battery materials and nanophase materials and the improved instrument resolution and availability of high energy beamlines such as I15-1 mean that this technique is particularly well suited to the nanophase and disordered material encountered in many catalytic processes and since data acquisition is rapid the technique is especially well-suited to in situ and operando studies.  PDF analysis provides the opportunity to determine pairpair distributions over large distances ranges from the immediate local, nearest-neighbours, as well as the more extended range of the bulk structure. There are many examples in the literature of the study of catalytic systems, including both in situ and ex situ studies and these include recent studies of metal organic frameworks and photocatalysts.

To introduce the technique to the Catalysis Hub, Dr Phil Chater from I15-1 will present a webinar on the 7th February, register for the event for free at:

https://www.eventbrite.co.uk/e/new-x-ray-pair-distribution-function-pdf-bag-access-for-the-catalysis-hub-tickets-243521087127

This seminar will introduce the PDF technique and will describe how it has been applied to local structure studies on catalysts. The webinar will also explain how the plan PDF experiments and will discuss the training and outreach components of the BAG and the development of streamlined processing and analysis for selected, commonly encountered systems. 

Biography

Phil Chater is Principal Beamline Scientist of the I15-1 XPDF beamline at Diamond Light Source. His research is primarily focussed on the structural characterisation of energy materials using diffraction and total scattering methods. His work also involves the development of new measurement and analysis methodology for PDF data.

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