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- Title
Exceptional Hydrogen Diffusion Rate over Ru Nanoparticle‐Doped Polar MgO(111) Surface.
- Authors
Yoskamtorn, Tatchamapan; Mo, Jiaying; Chen, Lu; Wu, Simson; Mukhopadhyay, Sanghamitra; Hawkins, Alex; Wu, Xin‐Ping; Tsang, Shik Chi Edman
- Abstract
Hydrogen (H) conductivity on oxide‐based materials is crucially important in fuel cells and related catalysis. Here, this work measures the diffusion rate of H generated from Ru nanoparticles loaded on polar MgO(111) facet particles under H2 at elevated temperatures without moisture and compares it to conventional nonpolar MgO(110) for the first time by in situ quasielastic neutron scattering (QENS). The QENS reveals an exceptional diffusion rate on the polar facet via a proton (H+) hopping mechanism, which is an order of magnitude superior to that of typical H+‐conducting oxides. This work attributes this to the unique atomic arrangement of alternate layers of Mg cations and O anions of the polar MgO(111) where the strong electrostatic field of terminal oxygen anions facilitates protonic migration with a lower degree of local covalency.
- Subjects
QUASI-elastic scattering; NEUTRON scattering; MAGNESIUM oxide; ELECTROSTATIC fields; HYDROGEN; SOLID oxide fuel cells; HYDROGEN as fuel
- Publication
Small Methods, 2023, Vol 7, Issue 3, p1
- ISSN
2366-9608
- Publication type
Article
- DOI
10.1002/smtd.202201200