Inelastic incoherent neutron scattering study of the molecular properties of pure hydrogen peroxide and its water mixtures of different concentration.
We have investigated the spectra of shock-frozen H2O2-H2O mixtures across the full composition range 99.1%-0.0% H2O2. In contrast to literature reports, we find that intermediate compositions (30%-70% H2O2) freeze to a solid solution rather than phase separating, which only occurs on annealing to just below the melting point. We have fully characterised the dihydrate H2O2·2H2O (48.6% H2O2) for the first time and shown that its spectrum can account for the features previously observed on the surface of a Au/TiO2 catalyst.
AQura GmbH, D-63457 Hanau, Germany.
Peter W
PW
Albers
Evonik Industries AG, Business Line Active Oxygens, D-63457 Hanau, Germany.
Jürgen
J
Glenneberg
Computational Science and Engineering Department, STFC Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, United Kingdom.
Keith
K
Refson
ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom.
Stewart F
SF
Parker