Unravelling the role of cationic Ni2+ vacancies and Ni3+ ions in non-stoichiometric NiO: breakdown of anti-ferromagnetic ordering and large exchange bias

Constructing Cu defect band within TiO2 and supporting NiOx nanoparticles for efficient CO2 photoreduction

“…[32][33][34] Furthermore, the high conductivity of NiO, stemming from the presence of Ni 3+ ions and cationic vacancies ( positive holes), addresses the inherent poor conductivity of TiO 2 , thereby reducing charge transfer resistance. 33,35 Existing research indicates a tendency for Ni species to accumulate around defects and anchor to CoO vacancies. [36][37][38] However, the bonding mode between NiO and OV-doped TiO 2 remains unclear.…”