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Luo, LL; Su, M1,2,3; Yan, PF; Zou, LF; Schreiber, DK; Baer, DR; Zhu, ZH; Zhou, GW; Wang, YT; Bruemmer, SM; Xu, ZJ; Wang, CM
Atomic origins of water-vapour-promoted alloy oxidation
发表期刊NATURE MATERIALS
语种英语
关键词TRANSMISSION ELECTRON-MICROSCOPY OXIDE-GROWTH DYNAMICS VISUALIZATION ADHERENCE SCALES CR ATMOSPHERES INTERFACE CATALYSIS
摘要The presence of water vapour, intentional or unavoidable, is crucial to many materials applications, such as in steam generators, turbine engines, fuel cells, catalysts and corrosion(1-4). Phenomenologically, water vapour has been noted to accelerate oxidation of metals and alloys(5,6). However, the atomistic mechanisms behind such oxidation remain elusive. Through direct in situ atomic-scale transmission electron microscopy observations and density functional theory calculations, we reveal that water-vapour-enhanced oxidation of a nickel-chromium alloy is associated with proton-dissolution-promoted formation, migration, and clustering of both cation and anion vacancies. Protons derived from water dissociation can occupy interstitial positions in the oxide lattice, consequently lowering vacancy formation energy and decreasing the diffusion barrier of both cations and anions, which leads to enhanced oxidation in moist environments at elevated temperatures. This work provides insights into water-vapour-enhanced alloy oxidation and has significant implications in other material and chemical processes involving water vapour, such as corrosion, heterogeneous catalysis and ionic conduction.
2018
ISSN1476-1122
卷号17期号:6页码:514
学科领域Chemistry ; Materials Science ; Physics
学科门类Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
DOI10.1038/s41563-018-0078-5
收录类别SCIE
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22891
专题理论物理所科研产出_SCI论文
作者单位1.Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA
2.Pacific Northwest Natl Lab, Computat Math Grp, Richland, WA 99352 USA
3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing, Peoples R China
5.SUNY Binghamton, Dept Mech Engn, Binghamton, NY USA
6.SUNY Binghamton, Multidisciplinary Program Mat Sci & Engn, Binghamton, NY USA
7.Schreiber, Daniel K.; Bruemmer, Stephen M.] Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA
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GB/T 7714
Luo, LL,Su, M,Yan, PF,et al. Atomic origins of water-vapour-promoted alloy oxidation[J]. NATURE MATERIALS,2018,17(6):514.
APA Luo, LL.,Su, M.,Yan, PF.,Zou, LF.,Schreiber, DK.,...&Wang, CM.(2018).Atomic origins of water-vapour-promoted alloy oxidation.NATURE MATERIALS,17(6),514.
MLA Luo, LL,et al."Atomic origins of water-vapour-promoted alloy oxidation".NATURE MATERIALS 17.6(2018):514.
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