Electroreduction of Ni(Ⅱ) to metallic Ni in urea NaBr melt at 373 K is irreversible in one step. Gd(Ⅲ) is not reduced to Gd alone, but can be inductively codeposited with Ni(Ⅱ). The amorphous Gd Ni alloy films were...Electroreduction of Ni(Ⅱ) to metallic Ni in urea NaBr melt at 373 K is irreversible in one step. Gd(Ⅲ) is not reduced to Gd alone, but can be inductively codeposited with Ni(Ⅱ). The amorphous Gd Ni alloy films were obtained by potentiostatic electrolysis and galvanostatic electrolysis. With the cathode potential shift to negative direction and the increase of current density, the content of gadolinium in the alloy increases first, and then drops down gradually. The molar ratio of Gd(Ⅲ) to Ni(Ⅱ) and the time also influence the content of Gd. Crystalline GdNi 3 alloy was obtained after heat treatment of the deposit. [展开更多
The cyclic voltammetry, chronopotentiometry and chronoamperometry were used to study the behaviors of Fe 2+ on Pt, Cu, Ag and Ti electrodes in urea NaBr melt at 373 K. Electroreduction of Fe 2+ to metallic ...The cyclic voltammetry, chronopotentiometry and chronoamperometry were used to study the behaviors of Fe 2+ on Pt, Cu, Ag and Ti electrodes in urea NaBr melt at 373 K. Electroreduction of Fe 2+ to metallic Fe is irreversible in one step. The exchange current density determined on Ti electrode is 2 68×10 -5 A·cm -2 . Sm 3+ does not reduce to Sm alone, but can be inductively codeposited with Fe 2+ . Sm Fe alloy film contained over 90% Sm (mass fraction) can be obtained by potentiostatic electrolysis and galvanostatic electrolysis on Cu substrate. The Sm content in the alloy is related to the cathode potential, current density and the Sm 3+ /Fe 2+ molar ratio. The surface state of the Sm Fe deposit was studied by scanning electron microscopy.展开更多
采用一步法制备平面结构的钙钛矿太阳能电池(Perovskite Solar Cells,PSCs)。采用旋涂法在SnO_(2)电子传输层(Electron Transport Layers,ETLs)和钙钛矿层之间插入漠化钠(NaBr)界面修饰层,主要研究了NaBr溶液的浓度对PSCs的影响,并探索...采用一步法制备平面结构的钙钛矿太阳能电池(Perovskite Solar Cells,PSCs)。采用旋涂法在SnO_(2)电子传输层(Electron Transport Layers,ETLs)和钙钛矿层之间插入漠化钠(NaBr)界面修饰层,主要研究了NaBr溶液的浓度对PSCs的影响,并探索了NaBr的对电池性能的影响机理。通过XRD、SEM、ATM、XPS、PL、UV-Vis及J-V等对样品的形貌、结构、吸光度及光电性能等参数进行系统研究。结果表明:NaBr能够增强钙钛矿的结晶性能和光吸收,增强SnO_(2)ETLs和钙钛矿层之间的界面结合,有效提升电池效率。当NaBr浓度为0.2mol/L时,器件的光电性能最佳,其光电转换效率(Photoelectric Conversion Efficiency,PCE)为16.21%,开路电压(Open-circuit Voltage,Voc)为1.07 V,短路电流密度(Short-circuit Current Density,Jsc)为20.22mA/cm^(2),填充因子(Fill Factor,FF)为75.13%。展开更多
The structural and electronic properties of sodium bromide （NaBr） are investigated by the density functional theory （DFT） within the generalized gradient approximation （GGA） for the exchange and correlation ener...The structural and electronic properties of sodium bromide （NaBr） are investigated by the density functional theory （DFT） within the generalized gradient approximation （GGA） for the exchange and correlation energy. The equilibrium lattice constant, bulk modulus and its pressure derivative are obtained by fitting the calculated total energy to the third-order Birch-Murnaghan equation of state. The band structure along the higher symmetry axes in the Brillouin zone, the density of states （DOS） and the partial density of states （PDOS） are presented. The results have been discussed and compared with the available experimental and theoretical data.展开更多
A wide variety of aldoximes and ketoximes were regenerated to corresponding carbonyl compounds with Al（NO3）3·9H2O in presence of catalytic amounts of NaBr in CH2Cl2 at room temperature.
文摘Electroreduction of Ni(Ⅱ) to metallic Ni in urea NaBr melt at 373 K is irreversible in one step. Gd(Ⅲ) is not reduced to Gd alone, but can be inductively codeposited with Ni(Ⅱ). The amorphous Gd Ni alloy films were obtained by potentiostatic electrolysis and galvanostatic electrolysis. With the cathode potential shift to negative direction and the increase of current density, the content of gadolinium in the alloy increases first, and then drops down gradually. The molar ratio of Gd(Ⅲ) to Ni(Ⅱ) and the time also influence the content of Gd. Crystalline GdNi 3 alloy was obtained after heat treatment of the deposit. [
文摘The cyclic voltammetry, chronopotentiometry and chronoamperometry were used to study the behaviors of Fe 2+ on Pt, Cu, Ag and Ti electrodes in urea NaBr melt at 373 K. Electroreduction of Fe 2+ to metallic Fe is irreversible in one step. The exchange current density determined on Ti electrode is 2 68×10 -5 A·cm -2 . Sm 3+ does not reduce to Sm alone, but can be inductively codeposited with Fe 2+ . Sm Fe alloy film contained over 90% Sm (mass fraction) can be obtained by potentiostatic electrolysis and galvanostatic electrolysis on Cu substrate. The Sm content in the alloy is related to the cathode potential, current density and the Sm 3+ /Fe 2+ molar ratio. The surface state of the Sm Fe deposit was studied by scanning electron microscopy.
文摘采用一步法制备平面结构的钙钛矿太阳能电池(Perovskite Solar Cells,PSCs)。采用旋涂法在SnO_(2)电子传输层(Electron Transport Layers,ETLs)和钙钛矿层之间插入漠化钠(NaBr)界面修饰层,主要研究了NaBr溶液的浓度对PSCs的影响,并探索了NaBr的对电池性能的影响机理。通过XRD、SEM、ATM、XPS、PL、UV-Vis及J-V等对样品的形貌、结构、吸光度及光电性能等参数进行系统研究。结果表明:NaBr能够增强钙钛矿的结晶性能和光吸收,增强SnO_(2)ETLs和钙钛矿层之间的界面结合,有效提升电池效率。当NaBr浓度为0.2mol/L时,器件的光电性能最佳,其光电转换效率(Photoelectric Conversion Efficiency,PCE)为16.21%,开路电压(Open-circuit Voltage,Voc)为1.07 V,短路电流密度(Short-circuit Current Density,Jsc)为20.22mA/cm^(2),填充因子(Fill Factor,FF)为75.13%。
文摘The structural and electronic properties of sodium bromide （NaBr） are investigated by the density functional theory （DFT） within the generalized gradient approximation （GGA） for the exchange and correlation energy. The equilibrium lattice constant, bulk modulus and its pressure derivative are obtained by fitting the calculated total energy to the third-order Birch-Murnaghan equation of state. The band structure along the higher symmetry axes in the Brillouin zone, the density of states （DOS） and the partial density of states （PDOS） are presented. The results have been discussed and compared with the available experimental and theoretical data.
基金support for this work by the research facilities of Ilam University
文摘A wide variety of aldoximes and ketoximes were regenerated to corresponding carbonyl compounds with Al（NO3）3·9H2O in presence of catalytic amounts of NaBr in CH2Cl2 at room temperature.
