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Effects of W Addition on the Electrochemical Behaviour and Passive Film Properties of Fe-Based Amorphous Alloys in Acetic Acid Solution

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Acta Metallurgica Sinica(English Letters) 2018年第10期31卷 1098-1108页

作者： Dan-Dan Liang Xian-Shun Wei Chun-Tao Chang Jia-Wei Li Yong Wang Xin-Min Wang Jun Shen School of Materials Science and Engineering Tongji University Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences School of Mechanical Science and Engineering Northeast Petroleum University

The electrochemical behaviour and passive film properties of Fe-Cr-Mo-W-C-B-Y amorphous alloys in acetic acid solution were investigated. The potentiodynamic polarisation and Nyquist curves demonstrated that W addition signifi- cantly enhanced the corrosion resistance. Mott-Schottky plots and angle-resolved X-ray photoelectron spectra indicated that passive films with different W contents exhibited dipolar （p-n） semiconducting characteristics separated by fiat-band potentials. The outer and inner oxide layers of the passive films were modified by reducing the acceptor and donor densities. Moreover, W addition favoured the formation of a thicker and more stable passive film to inhibit the dissolution of alloy elements.

关键词： Amorphous alloy XPS Mott-Schottky measurement Passive film semiconducting property Chemical ingredient

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Effect of Chloride on semiconducting Properties of Passive Films Formed on Supermartensitic Stainless Steel in NaHCO_3 Solution

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Journal of Iron and Steel Research International 2013年第5期20卷 74-79页

作者： HAN Xiao-chen LI Jun ZHAO Kun-yu ZHANG Wei SU Jie College of Materials Science and Engineering Kunming University of Science and Technology CISRI Qingdao Marine Corrosion Institute Institute of Structural Materials Central Iron and Steel Research Institute

The effects of chloride ion on the electrochemical behavior and the semiconducting properties of the passive film on supermartensitic stainless steel in 0.5 mol/L NaHCO_3 solution were investigated using potentiodynamic polarization, the potentiostatic current transients and Mott-Schottky analysis. The results indicated that chloride ion narrowed passivation region and improved pitting susceptibility. The steady state current densities were independent of film-formed potentials, which was in good agreement with the assumption of the point defect model （PDM）. The capacitance results showed the fact that the passive films had a multilayer character. The defect density decreased with increasing passive film formation potential. The chloride ion induced changes of the acceptor densities and donor densities of the passive films.

关键词： supermartensitic stainless steel passive film capacitance measurement semiconducting property chloride ion

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Covalent Organic Frameworks with trans-Dimensionally Vinylene-linked π-Conjugated Motifs

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Chemical Research in Chinese Universities 2022年第2期38卷 382-395页

作者： BI Shuai MENG Fancheng ZHANG Zixing WU Dongqing ZHANG Fan School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240P.R.China

Vinylene-linked covalent organic frameworks(COFs) are a class of promising porous organic materials that feature fully π-conjugated structures, high crystallinity, permanent porosity, ultrahigh chemical stability, and extraordinary optoelectronic properties. Over the past 5 years, this kind of material has been witnessed rapid development either in chemical synthesis or in potential applications. In this review, we summarize the chemistry to synthesize vinylene-linked COFs, especially the synthetic strategies involving activation of aryl methyl groups for condensation reaction. We then scrutinize the state-of-the-art development in properties and functions of this kind of COFs. Our own opinions on the further development of the vinylene-linked COFs are also presented for discussion.

关键词： Covalent organic framework(COF) Vinylene linkage Stability π-Conjugated structure semiconducting property

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Structure and semiconducting Character of a Polymeric Iodoplumbate Coordination Complex

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Chinese Journal of Structural Chemistry 2011年第8期30卷 1142-1146页

作者：宋德生刘长春陈恒隽苏东坡傅志勇 Key Laboratory of New Energy Technology for Guangdong Universities School of Chemistry and Chemical Engineering South China University of Technology

A new polymeric iodoplumbate complex [Zn（DMF）6][Pb2I6] 1 has been prepared and characterized by elemental analysis and single-crystal X-ray analysis. Its structure contains infinite iodoplumbate chains constructed by the [PbI5] subunit. EHT crystal orbital calculation and the experimental results show that this material is an unconventional semiconductor and the electrical character is associated with its structural feature.

关键词： iodoplumbate coordination polymer structure and characterization semiconducting property

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