Noncrystalline Titanium Oxide Catalysts for Electrochemical Oxygen Reduction Reactions.

ABSTRACT: Titanium oxides crystals are widely used in a variety of fields, but little has been reported on the functionalities of noncrystalline intermediates formed in their structural transformation. We measured the oxygen reduction reaction activity of titanium oxide nanoparticles heat-treated for a different time and found that the activity abruptly increased at a certain time of the treatment. We analyzed their structures by using X-ray pair distribution functions with the help of high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy and ascertained that the abrupt increase in the activity corresponded to a structural transformation from a reduced lepidocrocite-type layered titanate to a disordered structure consisting of domains of brookite-like TiO₆

SUBMITTER: Tominaka S 

PROVIDER: S-EPMC6641928 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature