  High pressure energy-dispersive X-ray absorption spectroscopy is a valuable
structural technique, especially, when combined with a nano-polycrystalline
diamond anvil cell. Here we present recent results obtained using the
dispersive setup of the ODE beamline at SOLEIL synchrotron. The effect of
pressure and temperature on the X-ray induced photoreduction is discussed on
the example of nanocrystalline CuO. The possibility to follow local environment
changes during pressure-induced phase transitions is demonstrated for
alpha-MoO3 based on the reverse Monte Carlo simulations.
