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adsorption and dissociation on Pt electrodeSuzuki, Chikashi; Nakagiri, Toshio
Solid State Ionics, 179(21-26), p.855 - 861, 2008/09
Times Cited Count：3 Percentile：17.18(Chemistry, Physical)no abstracts in English
Sawada, Shinichi; Yamaki, Tetsuya; Nishimura, Hidetoshi*; Asano, Masaharu; Suzuki, Akihiro*; Terai, Takayuki*; Maekawa, Yasunari
Solid State Ionics, 179(27-32), p.1611 - 1614, 2008/09
Times Cited Count：13 Percentile：50.66(Chemistry, Physical)We measured the self-diffusion coefficient of water, D, in proton exchange membranes (PEMs) based on crosslinked polytetrafluoroethylene (PTFE) films by a radiotracer-permeation method using tritium labeled water (HTO). When the crosslinking density of the PTFE matrix increased, the D value became smaller. This decreasing trend coincided with that of a water-content parameter, 
, defined as the number of water molecules per sulfonic acid (SOH) group. According to the model assumption of hydrophilic regions, the relationship between the D and indicates that the amount of free water in the crosslinked-PTFE PEMs could be lower than that in the non-crosslinked one, thereby restricting the mobility of water molecules through strong interactions between the majority of water and SOH groups.
Xianglian*; Basar, K.*; Honda, Hiroyuki*; Siagian, S.*; Ohara, Kota*; Sakuma, Takashi*; Takahashi, Haruyuki*; Igawa, Naoki; Ishii, Yoshinobu*
Solid State Ionics, 179(21-26), p.776 - 779, 2008/09
Times Cited Count：3 Percentile：17.18(Chemistry, Physical)Diffuse X-ray and neutron scattering from powder PbF are measured at 15 and 294K. Those oscillatory profile of diffuse scattering is explained by including the correlation effects among thermal displacements of atoms. The contribution of correlated thermal vibration of Pb-Pb atoms located at far-off distance to the oscillatory profile of diffuse scattering intensities is first confirmed.
