起动控制规律对于辅助动力装置(Auxiliary Power Unit,APU)至关重要。针对APU起动控制规律设计中的控制时序、供油规律、起动过程中的限制及保护等关键技术点进行深入研究,提出一种适应性较好的起动控制规律。经多型APU整机试验验证,提...起动控制规律对于辅助动力装置(Auxiliary Power Unit,APU)至关重要。针对APU起动控制规律设计中的控制时序、供油规律、起动过程中的限制及保护等关键技术点进行深入研究,提出一种适应性较好的起动控制规律。经多型APU整机试验验证,提出的起动控制规律可缩短整机调试时间,提高研制效率。展开更多
Photoelectrochemical reduction of CO_(2)to produce CO with metal-organic frameworks(MOFs)is recognized as a desirable technology to mitigate CO_(2)emission and generate sustainable energy.To achieve highly efficient e...Photoelectrochemical reduction of CO_(2)to produce CO with metal-organic frameworks(MOFs)is recognized as a desirable technology to mitigate CO_(2)emission and generate sustainable energy.To achieve highly efficient electrocatalyst,it is essential to design a new material interface and uncover new reaction mechanisms or kinetics.Herein,we developed two metal-organic Cu-MOF and Bi-MOF layers using benzene tricarboxylic acid(H_(3)BTC)ligands on CuBi_(2)O_(4) photocathodes.Both MOF layers drastically improved the photoelectrochemical stability by suppressing the photo-corrosion through conformal surface passivation.The Cu-MOF modified CuBi_(2)O_(4) showed more significant charge separation and transfer efficiencies than the Bi-MOF modified control.Based on the transient photocurrent curves under the applied potential of 0.6 V vs.RHE,the rate-law analysis showed the CO_(2)photoreduction took place through a first-order reaction.Further,the photoelectrochemical impedance spectra(PEIS)revealed this reaction order,representing an“operando”analysis.Moreover,the reaction rate constant on Cu-MOF modified sample was higher than that on Bi-MOF modified one and bare CuBi_(2)O_(4).Combined with the density functional theory calculation,the surface absorption of CO_(2)and CO molecules and the higher energy barrier for*COOH intermediates could significantly determine the first order reaction.展开更多
文摘起动控制规律对于辅助动力装置(Auxiliary Power Unit,APU)至关重要。针对APU起动控制规律设计中的控制时序、供油规律、起动过程中的限制及保护等关键技术点进行深入研究,提出一种适应性较好的起动控制规律。经多型APU整机试验验证,提出的起动控制规律可缩短整机调试时间,提高研制效率。
基金financially supported by the National Natural Science Foundation of China(No.51805181)the National Science Fund for Distinguished Young Scholars of China(No.51725504)the Fundamental Research Funds for the Central Universities of China(No.2020kfy XJJS049)。
基金supported by the National Natural Science Foundation of China(Project.U1604121)and Startup funding from Suzhou University of Science and Technology.
文摘Photoelectrochemical reduction of CO_(2)to produce CO with metal-organic frameworks(MOFs)is recognized as a desirable technology to mitigate CO_(2)emission and generate sustainable energy.To achieve highly efficient electrocatalyst,it is essential to design a new material interface and uncover new reaction mechanisms or kinetics.Herein,we developed two metal-organic Cu-MOF and Bi-MOF layers using benzene tricarboxylic acid(H_(3)BTC)ligands on CuBi_(2)O_(4) photocathodes.Both MOF layers drastically improved the photoelectrochemical stability by suppressing the photo-corrosion through conformal surface passivation.The Cu-MOF modified CuBi_(2)O_(4) showed more significant charge separation and transfer efficiencies than the Bi-MOF modified control.Based on the transient photocurrent curves under the applied potential of 0.6 V vs.RHE,the rate-law analysis showed the CO_(2)photoreduction took place through a first-order reaction.Further,the photoelectrochemical impedance spectra(PEIS)revealed this reaction order,representing an“operando”analysis.Moreover,the reaction rate constant on Cu-MOF modified sample was higher than that on Bi-MOF modified one and bare CuBi_(2)O_(4).Combined with the density functional theory calculation,the surface absorption of CO_(2)and CO molecules and the higher energy barrier for*COOH intermediates could significantly determine the first order reaction.
