扩散
极地的
氢
化学物理
纳米颗粒
材料科学
催化作用
电导率
质子
面(心理学)
准弹性中子散射
兴奋剂
工作(物理)
氧气
氧化物
散射
中子散射
化学
纳米技术
物理化学
非弹性中子散射
热力学
有机化学
人格
冶金
光学
物理
天文
社会心理学
量子力学
光电子学
心理学
五大性格特征
作者
Tatchamapan Yoskamtorn,Jiaying Mo,Lu Chen,Shuming Wu,Sanghamitra Mukhopadhyay,A. D. Hawkins,Xin‐Ping Wu,Shik Chi Edman Tsang
标识
DOI:10.1002/smtd.202201200
摘要
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 H 2 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.
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