The precise construction of anti-electromagnetic interference composites with highly efficient absorption capability,superior self-cleaning,and excellent thermal conductivity is still challenging since the incompatibi...The precise construction of anti-electromagnetic interference composites with highly efficient absorption capability,superior self-cleaning,and excellent thermal conductivity is still challenging since the incompatibility of multi performances.Herein,FeNi@C/ZnO array nanostructures are decorated on a flexible carbon cloth backbone to solve this challenge.The carbon cloth grown with hierarchical ZnO arrays not only possesses high dielectric loss capability,but the magnetic loss also can be modulated via controlling the depositing content of FeNi@C nanoparticles(NCs).This approach effectively fulfills the appropriate impedance matching and broad effective absorption bandwidth(EAB,the reflection loss<-10 dB).Our prepared FeNi@C/ZnO/CC composite can achieve a minimum reflection loss value of-39.36 dB,and the corresponding EAB can cover the entire X-band.Moreover,it exhibits excellent self-cleaning performance with a water contact angle as high as 155°.In addition,benefiting from the exquisite nano/micro structural design,the fabric composite also possesses superior thermal management property,with a thermal conductivity of 0.23 W m^(-1) K^(-1).This study has the potential to be applied in the field of electromagnetic wave absorption(EWA)materials and multifunctional electrical devices.展开更多
Electrocatalytic urea synthesis provides a favorable strategy for conventional energy-consuming urea synthesis,but achieving large-scale catalyst synthesis with high catalytic efficiency remains challenging.Herein,we ...Electrocatalytic urea synthesis provides a favorable strategy for conventional energy-consuming urea synthesis,but achieving large-scale catalyst synthesis with high catalytic efficiency remains challenging.Herein,we developed a simple method for the preparation of a series of FeNi-alloy-based catalysts,named FeNi@nC-T(n represents the content of nanoporous carbon as 1,3,5,7 or 9 g and T=900,950,1000 or 1100°C),for highly performed urea synthesis via NO_(3)−and CO_(2)co-reduction.The FeNi@7C-1000 achieved a high urea yield of 1041.33 mmol h^(−1)gFeNi^(−1)with a Faradaic efficiency of 15.56%at–1.2 V vs.RHE.Moreover,the scale-up synthesized FeNi@7C-950-S(over 140 g per batch)was achieved with its high catalytic performance and high stability maintained.Mechanism investigation illuminated that the Ni and Fe sites catalyze and stabilize the key*CO and*N intermediates and minimize the C–N coupling reaction barriers for highly efficient urea synthesis.展开更多
基金financially supported by the Key Natural Science Project of Anhui Provincial Education Department(Nos.2022AH051090 and 2022AH051125)the University Synergy Innovation Program of Anhui Province(Nos.GXXT-2022089 and GXXT-2023-027)+3 种基金Chuzhou University Research Start-Up Fund Project(Nos.2023qd17 and 2023qd75)the Research Projects of Department of Education of Guangdong Province(No.2024KQNCX036)the Shenzhen Polytechnic Research Fund(Nos.6024310017K and 6022312025K)the Post-doctoral Later-stage Foundation Project of Shenzhen Polytechnic University(No.1049-6023271041K1)
文摘The precise construction of anti-electromagnetic interference composites with highly efficient absorption capability,superior self-cleaning,and excellent thermal conductivity is still challenging since the incompatibility of multi performances.Herein,FeNi@C/ZnO array nanostructures are decorated on a flexible carbon cloth backbone to solve this challenge.The carbon cloth grown with hierarchical ZnO arrays not only possesses high dielectric loss capability,but the magnetic loss also can be modulated via controlling the depositing content of FeNi@C nanoparticles(NCs).This approach effectively fulfills the appropriate impedance matching and broad effective absorption bandwidth(EAB,the reflection loss<-10 dB).Our prepared FeNi@C/ZnO/CC composite can achieve a minimum reflection loss value of-39.36 dB,and the corresponding EAB can cover the entire X-band.Moreover,it exhibits excellent self-cleaning performance with a water contact angle as high as 155°.In addition,benefiting from the exquisite nano/micro structural design,the fabric composite also possesses superior thermal management property,with a thermal conductivity of 0.23 W m^(-1) K^(-1).This study has the potential to be applied in the field of electromagnetic wave absorption(EWA)materials and multifunctional electrical devices.
文摘Electrocatalytic urea synthesis provides a favorable strategy for conventional energy-consuming urea synthesis,but achieving large-scale catalyst synthesis with high catalytic efficiency remains challenging.Herein,we developed a simple method for the preparation of a series of FeNi-alloy-based catalysts,named FeNi@nC-T(n represents the content of nanoporous carbon as 1,3,5,7 or 9 g and T=900,950,1000 or 1100°C),for highly performed urea synthesis via NO_(3)−and CO_(2)co-reduction.The FeNi@7C-1000 achieved a high urea yield of 1041.33 mmol h^(−1)gFeNi^(−1)with a Faradaic efficiency of 15.56%at–1.2 V vs.RHE.Moreover,the scale-up synthesized FeNi@7C-950-S(over 140 g per batch)was achieved with its high catalytic performance and high stability maintained.Mechanism investigation illuminated that the Ni and Fe sites catalyze and stabilize the key*CO and*N intermediates and minimize the C–N coupling reaction barriers for highly efficient urea synthesis.
