Enhanced Proton Transport in Nb-Doped Rutile TiO₂: A Highly Useful Class of Proton-Conducting Mixed Ionic Electronic Conductors.

ABSTRACT: Mixed protonic and electronic conductors are essential materials as electrodes for electrochemical devices that use hydrogen as a reactant or product, such as fuel cells and steam electrolyzers. As the demand for devices operating at intermediate temperatures (<500 °C) is increasing, it has become highly desirable to develop optimized mixed protonic and electronic conductors for this temperature range. In this study, we investigated hydrogen dissolution and proton transport in Nb-doped rutile TiO₂ (Ti_0.96Nb_0.04O₂), an oxide semiconductor. Ti_0.96Nb_0.04O₂ dissolved hydrogen at 450 °C in a hydrogen atmosphere, incorporating 2.1 × 10²⁰ cm^-3 of protons to the semiconductor, which is 10-100 times h

SUBMITTER: Shiraiwa T 

PROVIDER: S-EPMC12395484 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature