Elucidating the reaction and diffusion network of oxygen interstitial atoms near a TiO2(1 1 0) surface
Elucidating the reaction and diffusion network of oxygen interstitial atoms near a TiO2(1 1 0) surface
复制标题
阐明 TiO2(1–1–0) 表面附近氧间隙原子的反应和扩散网络
DOI:
10.1016/j.apsusc.2018.11.123
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发表时间:
2019
影响因子:
6.7
通讯作者:
Seebauer, Edmund G.
中科院分区:
文献类型:
--
作者:
Gilliard-AbdulAziz, Kandis Leslie;Seebauer, Edmund G.
The kinetics and diffusion mechanism of surface-injected oxygen interstitials (Oi) in TiO2(1 1 0) were investigated using a microkinetics model in order to determine the effects of different conditions upon to the Oireaction-diffusion network. Extended defects, whether incipient or pre-existing, may act as a source or sink for Oi. The present work uses a quantitative microkinetic model to describe this diffusion and reaction network based upon isotopic gas-solid exchange experiments. Pertinent outputs from the model determined that the activation barrier for surface injection of Oiis 2.4 eV, while dissolution of Oifrom extended defect is 3.3 eV. The interstitial sequestration mechanism through extended defects leads to kinetic coupling effects that other sequestration mechanisms would not typically induce.
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DOI:
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发表时间:
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期刊:
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影响因子:
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