Heat capacities of the rare-earth complex with glycine [Ho(Gly)3Cl3·3H2O] were measured with a high-precision automatic adiabatic calorimeter over the temperature range from 78 to 348 K.In the experimental temper...Heat capacities of the rare-earth complex with glycine [Ho(Gly)3Cl3·3H2O] were measured with a high-precision automatic adiabatic calorimeter over the temperature range from 78 to 348 K.In the experimental temperature range,the heat capacities increased in a smooth and continuous manner and no phase transition or thermal anomaly occurred.Therefore,the sample was stable in the above temperature range.The values of experimental heat capacities were fitted to a polynomial equation with least square method and ...展开更多
The development of high-performance electrolyte-supported reversible solid oxide cells(RSOCs)is significantly hindered by the limitations of existing electrolyte materials,particularly in achieving high ionic conducti...The development of high-performance electrolyte-supported reversible solid oxide cells(RSOCs)is significantly hindered by the limitations of existing electrolyte materials,particularly in achieving high ionic conductivity and long-term stability under targeted operating conditions.While scandia stabilized zirconia(ScSZ)exhibits the highest ionic conductivity among zirconia-based electrolytes,ScSZ rapid conductivity degradation during prolonged operation remains a significant obstacle to commercialization.To address this pressing challenge,both binary and ternary co-doping were explored,incorporating Mg^(2+),In^(3+),Yb^(3+),and Sm^(3+)into the base composition of(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.89)(11ScSZ).Among these,the optimized ternary co-doped composition,(In_(2)O_(3))_(0.0025)(Yb_(2)O_(3))_(0.0025)(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.885)(0.25In0.25Yb11ScSZ),demonstrates significant enhancements in both ionic conductivity and stability.This ternary co-doped electrolyte exhibits superior conductivity and nearly double the stability of undoped 11ScSZ.In addition,it exhibits an enhanced flexural strength even higher than state-of-the-art electrolytes(161 MPa)and respectably wide electrolytic domain(10^(-16)-10^(-27)atm at 800℃).When implemented in 200μm-thick electrolyte-supported RSOC devices,the 0.25In0.25Yb11ScSZ electrolyte enables record-breaking performance,achieving a peak power density(PPD)of 1.02 W cm^(-2)in fuel cell(FC)mode and a current density of 1.05 A cm^(-2)at 1.3 V in electrolysis cell(EC)mode at 800℃both representing two-to three-fold improvement over state-of-the-art systems.These exceptional performance metrics,combined with excellent long-term durability,rank among the highest reported for electrolyte-supported cells,highlighting the potential of this novel ternary co-doped electrolyte for high-performance RSOC technologies capable of meeting the demanding requirements of next-generation energy systems.展开更多
Amino acid ionic liquid （AAIL） based on alanine, 1-n-heptyl-3-methylimidazolium alanine （[C7mim][Ala]）, has been prepared and characterized. Since the IL can form strong hydrogen bonds with water, trace amount of ...Amino acid ionic liquid （AAIL） based on alanine, 1-n-heptyl-3-methylimidazolium alanine （[C7mim][Ala]）, has been prepared and characterized. Since the IL can form strong hydrogen bonds with water, trace amount of water is a problematic impurity in the IL. Using the standard addition method （SAM）, the densities were measured in the temperature range from 293.15 to 343.15±0.05 K. On the basis of the experimental data of density, the surface tension y, molar volume, and the molecular vol- ume Vm, molar enthalpy of vaporization AIgHm0, and the thermal expansion coefficients or, for [C7mim][Ala] were estimated using semi-empirical methods. Also the interstice model has been verified with good accordance. Then the [C7mim][Ala] was taken as catalyst in the transesterification reaction with fatty acid, where soybean oil was used as raw material and methanol as reactant. The amount of catalyst, alcohol consumption, reaction time, temperature and other factors of the reaction were inves- tigated. Using GC determination, the conversions were calculated by the internal standard method. The main ingredients of the products were identified by GC-MS as palm methyl ester and linoleic acid methyl ester only, which showed high selectivity in palmitic acid and linoleic acid.展开更多
基金supported by the National Natural Science Foundation of China(20373072,20753002)
文摘Heat capacities of the rare-earth complex with glycine [Ho(Gly)3Cl3·3H2O] were measured with a high-precision automatic adiabatic calorimeter over the temperature range from 78 to 348 K.In the experimental temperature range,the heat capacities increased in a smooth and continuous manner and no phase transition or thermal anomaly occurred.Therefore,the sample was stable in the above temperature range.The values of experimental heat capacities were fitted to a polynomial equation with least square method and ...
基金Korea Evaluation Institute of Industrial Technology(KEIT)and the Ministry of Trade,Industry&Energy(MOTIE)of the Republic of Korea(No.20020284)Materials&Components Technology Development(R&D)Program(No.00432124)funded by the Ministry of Trade,Industry&Energy(MOTIE,Korea)。
文摘The development of high-performance electrolyte-supported reversible solid oxide cells(RSOCs)is significantly hindered by the limitations of existing electrolyte materials,particularly in achieving high ionic conductivity and long-term stability under targeted operating conditions.While scandia stabilized zirconia(ScSZ)exhibits the highest ionic conductivity among zirconia-based electrolytes,ScSZ rapid conductivity degradation during prolonged operation remains a significant obstacle to commercialization.To address this pressing challenge,both binary and ternary co-doping were explored,incorporating Mg^(2+),In^(3+),Yb^(3+),and Sm^(3+)into the base composition of(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.89)(11ScSZ).Among these,the optimized ternary co-doped composition,(In_(2)O_(3))_(0.0025)(Yb_(2)O_(3))_(0.0025)(Sc_(2)O_(3))_(0.11)(ZrO_(2))_(0.885)(0.25In0.25Yb11ScSZ),demonstrates significant enhancements in both ionic conductivity and stability.This ternary co-doped electrolyte exhibits superior conductivity and nearly double the stability of undoped 11ScSZ.In addition,it exhibits an enhanced flexural strength even higher than state-of-the-art electrolytes(161 MPa)and respectably wide electrolytic domain(10^(-16)-10^(-27)atm at 800℃).When implemented in 200μm-thick electrolyte-supported RSOC devices,the 0.25In0.25Yb11ScSZ electrolyte enables record-breaking performance,achieving a peak power density(PPD)of 1.02 W cm^(-2)in fuel cell(FC)mode and a current density of 1.05 A cm^(-2)at 1.3 V in electrolysis cell(EC)mode at 800℃both representing two-to three-fold improvement over state-of-the-art systems.These exceptional performance metrics,combined with excellent long-term durability,rank among the highest reported for electrolyte-supported cells,highlighting the potential of this novel ternary co-doped electrolyte for high-performance RSOC technologies capable of meeting the demanding requirements of next-generation energy systems.
基金financially supported by the National Natural Science Foundation of China (21003068, 21073189, 21071073)China Postdoctoral Science Foundation (20110491546)+1 种基金Key Projects in the National Science & Technology Pillar Program (2012BAF03B02)Liaoning University Research Funding
文摘Amino acid ionic liquid （AAIL） based on alanine, 1-n-heptyl-3-methylimidazolium alanine （[C7mim][Ala]）, has been prepared and characterized. Since the IL can form strong hydrogen bonds with water, trace amount of water is a problematic impurity in the IL. Using the standard addition method （SAM）, the densities were measured in the temperature range from 293.15 to 343.15±0.05 K. On the basis of the experimental data of density, the surface tension y, molar volume, and the molecular vol- ume Vm, molar enthalpy of vaporization AIgHm0, and the thermal expansion coefficients or, for [C7mim][Ala] were estimated using semi-empirical methods. Also the interstice model has been verified with good accordance. Then the [C7mim][Ala] was taken as catalyst in the transesterification reaction with fatty acid, where soybean oil was used as raw material and methanol as reactant. The amount of catalyst, alcohol consumption, reaction time, temperature and other factors of the reaction were inves- tigated. Using GC determination, the conversions were calculated by the internal standard method. The main ingredients of the products were identified by GC-MS as palm methyl ester and linoleic acid methyl ester only, which showed high selectivity in palmitic acid and linoleic acid.
