High-quality energy-dispersive XAFS on the 1 s timescale applied to electrochemical and catalyst systems.
A long program involving the development of a fast linear and stable detector, and the recent upgrade of the bent monochromator to a 4-point one at station 9.3 Daresbury Laboratory is showing exciting results such that it has now become possible to obtain analysable XAFS data on 50mM solutions in time scales of a second or less. Three examples of such data are shown: a homogeneous Ni catalyst reaction using a stopped flow system, a heterogeneous catalyst reduction showing time dependent data collected in a microreactor, and an electrochemical system showing the oxidation of small Pt particles as the potential is changed. The improvements have come from two major developments the monochromator and the detector.