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Charge Transport Characteristics of the Passive Oxide Film Formed on 3D Printed 316 L Stainless Steel in the Presence of FeII/FeIII Species
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-09-03 , DOI: 10.1021/acs.jpcc.0c05795 Kashif Mairaj Deen 1 , Muhammad J. K. Lodhi 2 , Edouard Asselin 1 , Waseem Haider 3, 4
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-09-03 , DOI: 10.1021/acs.jpcc.0c05795 Kashif Mairaj Deen 1 , Muhammad J. K. Lodhi 2 , Edouard Asselin 1 , Waseem Haider 3, 4
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The passive oxide film that forms on the surface of 3D printed 316 L stainless (AM-SS) under acidic (pH 1) and oxidizing conditions is studied. Particular emphasis is placed on its charge transport characteristics. The electrochemical behavior of the passive oxide film in the presence of various total Fe (FeII + FeIII species with a FeII/FeIII ratio of one) concentrations (from 100 to 800 ppm) was investigated due to its extended stability and large breakdown potential (0.85 V vs SCE). The passive film formed in the acidic electrolyte was mainly composed of chromium oxide as confirmed from an X-ray photoelectron spectroscopy depth profile analysis. The n-type semiconductor behavior at potential <0.6 V vs SCE and low flat band potential compared to OCP of AM-SS confirmed the formation of a passive oxide film. It is concluded that within OCP< E<0.6 (vs SCE), FeIII species reduced on the n-type oxide film and the adsorbed layer was enriched with FeII species. Further charge transport through the adsorbed layer was controlled by the diffusion of FeIII species. For E>0.6 V vs SCE, increases in the acceptor concentration and transformation of the oxide film into a p-type semi-conductor facilitated the oxidation of FeII species at the oxide/electrolyte interface.
中文翻译：
Fe II / Fe III物种在3D打印316 L不锈钢上形成的钝化氧化膜的电荷传输特性
研究了在酸性（pH 1）和氧化条件下在3D打印316 L不锈钢（AM-SS）表面上形成的钝化氧化膜。特别强调其电荷传输特性。各种总Fe（Fe II + Fe III物种和Fe II / Fe III的存在下）钝化氧化膜的电化学行为由于其扩展的稳定性和较大的击穿电位（0.85 V vs SCE），研究了一种浓度（从100至800 ppm）的比率（100至800 ppm）。X射线光电子能谱深度分布分析证实，在酸性电解质中形成的钝化膜主要由氧化铬构成。与AM-SS的OCP相比，在相对于SCE的电势<0.6 V vs SCE和低平坦带电势下的n型半导体行为证实了钝化氧化膜的形成。结论是，在OCP <E <0.6（vs SCE）内，n型氧化物膜上的Fe III物种减少，吸附层中富集了Fe II物种。通过Fe III的扩散控制通过吸附层的进一步电荷传输种类。当E> 0.6 V vs. SCE时，受主浓度的增加和氧化膜向p型半导体的转变促进了Fe II物种在氧化物/电解质界面的氧化。
更新日期：2020-10-02
中文翻译：
Fe II / Fe III物种在3D打印316 L不锈钢上形成的钝化氧化膜的电荷传输特性
研究了在酸性（pH 1）和氧化条件下在3D打印316 L不锈钢（AM-SS）表面上形成的钝化氧化膜。特别强调其电荷传输特性。各种总Fe（Fe II + Fe III物种和Fe II / Fe III的存在下）钝化氧化膜的电化学行为由于其扩展的稳定性和较大的击穿电位（0.85 V vs SCE），研究了一种浓度（从100至800 ppm）的比率（100至800 ppm）。X射线光电子能谱深度分布分析证实，在酸性电解质中形成的钝化膜主要由氧化铬构成。与AM-SS的OCP相比，在相对于SCE的电势<0.6 V vs SCE和低平坦带电势下的n型半导体行为证实了钝化氧化膜的形成。结论是，在OCP <E <0.6（vs SCE）内，n型氧化物膜上的Fe III物种减少，吸附层中富集了Fe II物种。通过Fe III的扩散控制通过吸附层的进一步电荷传输种类。当E> 0.6 V vs. SCE时，受主浓度的增加和氧化膜向p型半导体的转变促进了Fe II物种在氧化物/电解质界面的氧化。
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