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electrochemical behavior and corrosion resistance of IrO2–ZrO2 binary oxide coatings for promoting oxygen evolution in sulfuric acid solution

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International Journal of Minerals,Metallurgy and Materials 2020年第2期27卷 264-273页

作者： Bao Liu Shuo Wang Cheng-yan Wang Bao-zhong Ma Yong-qiang Chen School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Rare and Precious Metals Green Recycling and Extraction University of Science and Technology BeijingBeijing 100083China

In this study,we prepared Ti/IrO2–ZrO2 electrodes with different ZrO2 contents using zirconium-n-butoxide(C16H36O4Zr)and chloroiridic acid(H2IrCl6)via a sol–gel *** explore the effect of ZrO2 content on the surface properties and electrochemical behavior of electrodes,we performed physical characterizations and electrochemical *** obtained results revealed that the binary oxide coating was composed of rutile IrO2,amorphous ZrO2,and an IrO2–ZrO2 solid *** IrO2–ZrO2 binary oxide coatings exhibited cracked structures with flat regions.A slight incorporation of ZrO2 promoted the crystallization of the active component ***,the crystallization of IrO2 was hindered when the added ZrO2 content was greater than 30at%.The appropriate incorporation of ZrO2 enhanced the electrocatalytic performance of the pure IrO2 *** Ti/70at%IrO2–30at%ZrO2 electrode,with its large active surface area,improved electrocatalytic activity,long service lifetime,and especially,lower cost,is the most effective for promoting oxygen evolution in sulfuric acid solution.

关键词： electrode IrO2-ZrO2 oxygen evolution reaction electrochemical behavior corrosion resistance

electrochemical behavior of Mitoxantrone and Its Determination at a Pt/C Implanted Modified Microelectrode

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Chemical Research in Chinese Universities 2004年第1期20卷 103-107页

作者： QIANYong-gui SUNZi-jie HUJing-bo LUYi-qiang LIQi-long DepartmentofChemistry BeijingNormalUniversityBeijing100875P.R.China DepartmentofChemistry BeijingUniversityofScienceandTechnologyBeijing100083P.R.China

In a 0.02 mol/L Na_2HPO_4-KH_2PO_4(PBS) buffer solution(pH=6.82), the electrochemical behavior of mitoxantrone was studied by linear-sweep voltammetry and cyclic voltammetry at a Pt/C ion implantation modified microelectrode. A sensitive reduction peak was observed. The peak potential was \{-0.72 V\}(***), the peak current was proportional to the concentration of mitoxantrone within the ranges of 7.0×10 -8—9.0×10 -7 mol/L and 1.0×10 -6—2.4×10 -5 mol/L, with a detection limit of 4.0×10 -8 mol/L. The linear correlation coefficients were 0.9994 and 0.9992, respectively. This method has been applied to the direct determination of mitoxantrone in simulated urine. The recoveries were in the range from 96.2% to 105.9%. The reduction process was a quasi-reversible one with adsorptive characteristics at the Pt/C microelectrode. The electrode reaction rate constant k_s and the electron transfer coefficient α of the system were determined to be 4.5 and 0.65 s -1, respectively. The experiments showed that Pt element had surely been implanted into the surface of the carbon fiber, and the atomic Pt improved the electrocatalytic activity. The Pt/C microelectrode had a good stability and reproducibility.

关键词： Mitoxantrone electrochemical behavior Ion implantation Modified microelectrode

electrochemical behavior of CoCl_2 in ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate

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Journal of Central South University of Technology 2008年第5期15卷 617-621页

作者：周舟何德良崔正丹钟建芳李国希 State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082 China

The electrochemical behavior of CoCl2 in 1-butyl-3-methylimidazolium hexafluorophosphate (bmim]PF6) was investigated by cyclic voltammetry. The cyclic voltammograms were obtained from electrochemical measurement under different temperatures, and the reversible behavior for Co2+/Co3+ redox couple on glassy carbon electrode in bmim]PF6 was confirmed by the characteristic of the peak currents. The diffusion coefficients (about 10-11 m2/s) of Co2+ in bmim]PF6 under different temperatures were evaluated from the dependence of the peak current density on the potential scan rates in cyclic voltammograms. It is found that the diffusion coefficient increases with increasing temperature. Diffusion activation energy of Co2+ in bmim]PF6 is also calculated to be 23.4 kJ/mol according to the relationship between diffusion coefficient and temperature.

关键词： COCl2 electrochemical behavior ionic liquid cyclic voltammetry diffusion coefficient diffusion activation energy

electrochemical behavior of K_3Fe(CN)_6 in water-in-oil microemulsion

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Journal of Central South University 2009年第1期16卷 61-65页

作者：周海晖曾伟英晓芳曾金祥李丹陈金华旷亚非 College of Chemistry and Chemical Engineering Hunan University

A water-in-oil (W/O) microemulsion composed of Triton X-100, n-hexanol, n-hexane and water solution with hydrochloric acid was prepared. K3Fe(CN)6 was added in as a water-soluble electroactive probe, and its electrochemical behavior was investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It is found that the H+ concentration of the water phase has a great effect on the conductivity of the W/O microemulsion, and hence influences the electrochemical behavior of K3Fe(CN)6. When the pH value of water phase is about 7, the electrical conductivity of the W/O microemulsion is only 1.2×10-6 S/cm, and K3Fe(CN)6 almost cannot react at the glassy carbon electrode. But when the H+ concentration is more than 3 mol/L, the W/O microemulsion has a good electrical conductivity and K3Fe(CN)6 shows good electrochemical performance in it. The results of CV and EIS studies indicate that the electrochemical behavior of Fe(CN)63-/Fe(CN)64- in the W/O microemulsion is different from that in the aqueous solution. This may be due to the unique liquid structure of the W/O microemulsion and the unique mass transfer in the W/O microemulsion.

关键词： K3Fe(CN)6 electrochemical behavior W/O microemulsion electrical conductivity

electrochemical behavior of Adriamycin at Ni/GC Ion Implantation Modified Electrode

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Chinese Chemical Letters 2000年第7期11卷 601-602页

作者： Jing Bo HU Qi Long LI(Department of Chemistry, Beijing Normal University, Bejing 100875) Department of Chemistry Beijing Normal University Beijing 100875 China

With a Ni/GC ion implantation modified electrode as working electrode, in 0.1 mol/L HOAc-NaOAc (pH=4.62) solution, a sensitive reductive wave of ADM was obtained by linear sweep voltammetry. The peak potential was -0.55 V (***). The peak current is proportional to the concentration of ADM with a detection limit of 6.9 X 10(-8) mol/L. The behavior of the reduction wave was studied. The experiments of AES and XPS showed that Ni was surely implanted into the surface of the GCE and the implanted Ni at the GCE improved the electrocatalytic activity.

关键词： ion implantation modified electrode electrochemical behavior adriamycin

electrochemical behavior of electroplated Zn-P alloy

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中国有色金属学会会刊：英文版 2001年第4期11卷 603-605页

作者：张昭浙江大学化学系浙江杭州 310027

The electroplating behavior of Zn P alloy on copper from light acid chloride solutions (LACS) was investigated using cyclic voltammetry and linear potential sweep method. It is found that, under the experimental conditions, the concentrations of H 3PO 3 and ascorbic acid in LACS change the codeposition mechanism of Zn P alloy, the addition of H 3PO 3 into LACS promotes the three dimentional (3 D) instantaneous nucleation/growth, while the addition of ascorbic acid promotes the two dimentional (2 D) instantaneous nucleation and layer by layer growth. H 3PO 3 and zinc ions inhibit the deposition each other. The experimental results also show that H 3PO 3 in the LACS can be reduced on the cathode individually, and low pH value of the LACS promotes the reduction of H 3PO 3.

关键词： Zn P alloy codeposition electrochemical behavior

Non-monotonic influence of a magnetic field on the electrochemical behavior of Fe_(78)Si_9B_(13) glassy alloy in NaOH and NaCl solutions

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International Journal of Minerals,Metallurgy and Materials 2014年第10期21卷 1009-1018页

作者： Hong-di Zhang Xiao-yu Li Jing Pang Li-juan Yin Hai-jian Ma Ying-jie Li Yan Liu Wei-min Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) Shandong University Qingdao Yunlu Energy Technology Co. Ltd. School of Mechanical and Electrical Engineering Weifang University

The corrosion behavior and microstructure of Fe78Si9B13 glassy alloy in NaOH and NaCl solutions under a 0.02-T magnetic field were investigated through electrochemical testing and scanning electron microscopy （SEM）. The current-density prepeak （PP） in the anodic polarization curves in low-concentration NaOH solutions （classified as type I） tends to disappear when the NaOH concentration is increased to 0.4 mol/L and the magnetic field is applied. Under the magnetic field, the height of the second current-density peak is increased in low-concentration NaOH solutions （type I） but decreased in high-concentration NaOH solutions （type Ⅱ）. The non-monotonic effect of the magnetic field was similarly observed in the case of polarization curves of samples measured in NaCl solutions, Ring-like corroded patterns and round pits are easily formed under the magnetic field in NaOH and NaC1 solutions. These experimental results were discussed in terms of the magnetohydrodynamic （MHD） effect.

关键词： amorphous alloys electrochemical behavior magnetic field anodic polarization micrographs

Effect of thermo-mechanical processing on microstructure and electrochemical behavior of Ti-Nb-Zr-V new metastable β titanium biomedical alloy

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Transactions of Nonferrous Metals Society of China 2015年第3期25卷 759-769页

作者： Mohsin Talib MOHAMMED Zahid A.KHAN M.GEETHA Department of Mechanical Engineering Faculty of EngineeringKufa University Department of Mechanical Engineering Jamia Millia Islamia Centre for Biomaterials Science and Technology VIT University

The influence of thermo-mechanical processing (TMP) on the microstructure and the electrochemical behavior of new metastableβ alloy Ti?20.6Nb?13.6Zr?0.5V (TNZV) was investigated. The TMP included hot working in belowβ transus, solution heat treatments at the same temperature and different cooling rates in addition to aging. Depending upon the TMP conditions, a wide range of microstructures with varying spatial distributions and morphologies of equiaxed/elongatedα andβ phases were attained, allowing for a wide range of electrochemical properties to be achieved. The corrosion behavior of the studied alloy was evaluated in a Ringer’s solution at 37 °C via open circuit potential?time and potentiodynamic polarization measurements.

关键词： titanium alloy thermo-mechanical processing biomedical application microstructure electrochemical behavior corrosion

Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy

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Journal of Magnesium and Alloys 2022年第3期10卷 782-790页

作者： Shaolong Li Yusi Che Chenyao Li Yongchun Shu Jilin He Bin Yang Jianxun Song Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou University450001 ZhengzhouChina School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China National Engineering Laboratory of Vacuum Metallurgy Kunming University of Science and Technology650093 KunmingYunnanChina

The electrochemical behavior of Mg^(2+)and Al^(3+)in LiCl-KCl(mass 4:1)melt at 973 K was studied on a Mo electrode systematically by cyclic voltammetry,square wave voltammetry and *** results showed that the reductions of Mg^(2+)and Al^(3+)were reversible processes controlled by the rate of the mass *** Mg^(2+)and Al^(3+)coexisted in LiCl-KCl melt,they had no significant effect on the reduction potential of each *** equilibrium potentials of Mg^(2+)/Mg and Al^(3+)/Al were obtained by open circuit potential *** apparent standard potentials were also calculated in this system and the values were-2.52 V vs Cl_(2)/Cl^(−),-1.66 V vs Cl_(2)/Cl^(−),***,the apparent Gibbs free energies of Mg^(2+)/Mg and Al^(3+)/Al were-485.71 kJ/mol^(-1),-480.78 kJ/mol^(-1).Finally,potentiostatic electrolysis was performed on a Mo electrode in LiCl-KCl-MgCl_(2)-AlCl_(3)(the mass ratio of MgCl_(2) to AlCl_(3) was 10:1)melt at different *** components of the deposits were characterized by scanning electron microscope and energy dispersive *** study revealed that the content of Al in the deposit decreased as the overpotential increased and Al tended to segregate at the grain boundaries.

关键词： electrochemical behavior Thermodynamic properties Mg-Al alloy Electrolysis.