Mise en evidence et localisation des protons dans les bioxydes de plomb PbO2α et β chimiques et électrochimiques

摘要: Abstract Chemical and electrochemical samples of lead dioxides PbO2α (orthorhombic) PbO2β (tetragonal) are studied by quasi-elastic neutron scattering X-ray diffraction between 77 550 K. The presence OH−-like proton species is established: the characterized two types local motions ( ΔE 1 2 = 300 μ eV , 40 ). thermal expansion chemical sample shows: (1) loss charged after heating to K, (2) an anisotropy OH ··· O bonds in [PbO6] octahedra chains which oriented differently α β structures. An interpretation role protons proposed.