In this paper,dendritic Bi film electrodes with porous structure had successfully been prepared on glassy carbon electrode using a constant current electrolysis method based on hydrogen bubble dynamic templates.The el...In this paper,dendritic Bi film electrodes with porous structure had successfully been prepared on glassy carbon electrode using a constant current electrolysis method based on hydrogen bubble dynamic templates.The electrode prepared using a large applied current density showed an increased internal electroactive area and a significantly improved electrochemical performance.The analytical utility of the prepared dendritic Bi film electrodes for the determination of Pb(Ⅱ)and Cd(Ⅱ)in the range of 5–50 μg·L^(-1)were presented in combination with square wave stripping voltammetry in model solution.Compared with non-porous Bi film electrode,the dendritic Bi film electrode exhibited higher sensitivity and lower detection limit.The prepared Bi film electrode with dendritic structure was also successfully applied to real water sample analysis.展开更多
In this work,a novel stearic acid modified nickel-based(NiSA)superhydrophobic composite coating with good anti-corrosion properties was prepared on magnesium alloy AZ31 surface through electroless nickel-phosphorus pl...In this work,a novel stearic acid modified nickel-based(NiSA)superhydrophobic composite coating with good anti-corrosion properties was prepared on magnesium alloy AZ31 surface through electroless nickel-phosphorus plating,electrodeposition of porous nickel,and decoration with stearic acid.Surface topography,chemical groups,and structural compositions of the Ni SA coating were characterized through scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD),respectively.Adhesion of the Ni SA coating was evaluated by a tape test method,and corresponding water contact angle(WCA)and water sliding angle(WSA)were tested by a contact angle meter.Results indicate that WCA value of the Ni SA coating was154.6°±3.7°,and WSA value was 5.9°±1.7°,indicating a high superhydrophobicity.Electrochemical impedance spectroscopy(EIS)and Tafel fitting reveal that the corrosion current density of the coating(j_(corr)=1.41×10^(-8)A cm^(-2))was three orders of magnitude lower than that of the bare magnesium alloy,and the corresponding lowfrequency impedance modulus(|Z|_(f=0.01 Hz)=554.65 kΩcm^(2))increased by three orders of magnitude,verifying high corrosion resistance.Moreover,all contact angles(CA)of common liquid stains in life were higher than150°,indicating the good anti-fouling capability of the NiSA coating.展开更多
基金Supported by the National Natural Science Foundation of China(51472073,51201058)
文摘In this paper,dendritic Bi film electrodes with porous structure had successfully been prepared on glassy carbon electrode using a constant current electrolysis method based on hydrogen bubble dynamic templates.The electrode prepared using a large applied current density showed an increased internal electroactive area and a significantly improved electrochemical performance.The analytical utility of the prepared dendritic Bi film electrodes for the determination of Pb(Ⅱ)and Cd(Ⅱ)in the range of 5–50 μg·L^(-1)were presented in combination with square wave stripping voltammetry in model solution.Compared with non-porous Bi film electrode,the dendritic Bi film electrode exhibited higher sensitivity and lower detection limit.The prepared Bi film electrode with dendritic structure was also successfully applied to real water sample analysis.
基金financially supported by the National Natural Science Foundation of China(No.52271073)the Central Government Guided Special Program(No.2021ZYD0049)+1 种基金the Young Elite Scientists Sponsorship Program by CAST(No.2018QNRC001)the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province(No.2022CL17)
文摘In this work,a novel stearic acid modified nickel-based(NiSA)superhydrophobic composite coating with good anti-corrosion properties was prepared on magnesium alloy AZ31 surface through electroless nickel-phosphorus plating,electrodeposition of porous nickel,and decoration with stearic acid.Surface topography,chemical groups,and structural compositions of the Ni SA coating were characterized through scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD),respectively.Adhesion of the Ni SA coating was evaluated by a tape test method,and corresponding water contact angle(WCA)and water sliding angle(WSA)were tested by a contact angle meter.Results indicate that WCA value of the Ni SA coating was154.6°±3.7°,and WSA value was 5.9°±1.7°,indicating a high superhydrophobicity.Electrochemical impedance spectroscopy(EIS)and Tafel fitting reveal that the corrosion current density of the coating(j_(corr)=1.41×10^(-8)A cm^(-2))was three orders of magnitude lower than that of the bare magnesium alloy,and the corresponding lowfrequency impedance modulus(|Z|_(f=0.01 Hz)=554.65 kΩcm^(2))increased by three orders of magnitude,verifying high corrosion resistance.Moreover,all contact angles(CA)of common liquid stains in life were higher than150°,indicating the good anti-fouling capability of the NiSA coating.
