Catalysis in Flow: Operando Study of Pd Catalyst Speciation and Leaching
Conference Recording Jun 12, 2014
About the Speaker
Dr Hii graduated with First Class Honours in Chemistry from the University of Leeds. She conducted postgraduate studies with Prof. B. L. Shaw, FRS, followed by postdoctoral work at Oxford University with Dr. J. M. Brown, FRS. During this period, she was awarded a Junior Research Fellowship by Wadham College. Her independent research career began in 1997 with the award of a Ramsay Memorial Fellowship, co-sponsored by ICI Strategic Research Funding. A year later, she was appointed to a Lectureship at King’s College London, before moving to a Senior Lectureship at Imperial College (2003), where she was promoted to a Readership in 2009. Her research interests are in the development and applications of catalytic processes for organic synthesis.
AbstractA custom-made plug-flow fixed-bed catalytic reactor was designed and constructed to examine the behaviour of Pd catalysts during a Suzuki-Miyaura cross-coupling reaction. Spatial-temporal resolution of catalyst activation, deactivation and (possibly) leaching processes can be obtained by single-pass experiments. Subsequent deployment of the flow reactor in a X-ray absorption spectroscopy beam line allowed the catalyst bed to be mapped axially, revealing speciation of Pd(0) and Pd(II) species along the catalyst bed, distinct phase changes and unusual redox bi-stabilities.