In our work,we demonstrated network PtCu nanocrystals,in which the tuneable composition,clean surface,and ultrasmall size(diameter<5 nm)endow them with excellent electrocatalytic performances in both N_(2)reduction...In our work,we demonstrated network PtCu nanocrystals,in which the tuneable composition,clean surface,and ultrasmall size(diameter<5 nm)endow them with excellent electrocatalytic performances in both N_(2)reduction reaction under ambient conditions and methanol oxidation.A detailed investigation suggests that their electrocatalytic activity is highly composition dependent.We confirmed the production of NH3 from N_(2)through a systematic study.The optimum Pt_(6)Cu nanoalloys exhibit 2.3-fold and 20.6-fold increase in reduction activity toward N_(2)compared with Pt and Cu nanocrystals.Their faradaic efficiency value was also highly improved.Moreover,these bifunctional Pt_(6)Cu nanostructures also show excellent catalytic properties during methanol electrooxidation.The specific activity toward methanol oxidation reaches up to 21.3 mA cm^(−2),which is 3.6 times that of commercial Pt/C catalysts.This work thus provides a promising approach to design the alloy composition for bi-or multi-functional applications.展开更多
The magnetic relaxation and magnetization blocking barriers of butterfly complexes,[Dy_(2)Zn_(2)(L)_(4)(NO_(3))_(2)(CH_(3)OH)_(2)](1),[Dy_(2)Mn_(2)(L)_(4)(NO_(3))_(2)(DMF)_(2)](2)and[Dy_(2)Co_(2)(L)_(4)(NO_(3))_(2)(DM...The magnetic relaxation and magnetization blocking barriers of butterfly complexes,[Dy_(2)Zn_(2)(L)_(4)(NO_(3))_(2)(CH_(3)OH)_(2)](1),[Dy_(2)Mn_(2)(L)_(4)(NO_(3))_(2)(DMF)_(2)](2)and[Dy_(2)Co_(2)(L)_(4)(NO_(3))_(2)(DMF)_(2)]·2DMF(3)(H_(2)L=(E)-2-ethoxy-6-(((2-hydroxyphenyl)imino)methyl)phenol),were systematically investigated.The change of SMM behavior originating from the purposeful replacement of two ZnII sites in 1 with MnII and CoII was elucidated by a combined experimental and theoretical study.The quantum tunnelling of magnetization(QTM)was observed in 1.Contrarily,it was quenched in 2 and 3 by spin-spin exchange.A detailed comparative study on these closely-related model complexes reveals the remarkable changes of the ligand field splitting,anisotropy of the Dy-coordinated moiety and the total exchange spectrum due to the replacement of ZnII with CoII and MnII.展开更多
DearEditors-in-Chief,We read with interest the paper by Su et al.(2025)describing a soil incubation study.The paper provides useful data on the effect of wollastonite addition on CO_(2)emission/capture and soil proper...DearEditors-in-Chief,We read with interest the paper by Su et al.(2025)describing a soil incubation study.The paper provides useful data on the effect of wollastonite addition on CO_(2)emission/capture and soil properties.However,one of the main conclusions appears to directly contradict the data,perpetuating the unsupported notion that a significant amount of CO_(2)is captured during weathering of crushed silicate rockmixed into acidicsoil.展开更多
Clinical Question How to choose the drugs of adjuvant therapy for nonsmall-cell lung cancer(NSCLC)patients harboring driver gene mutation?Recommendations Recommendation 1:We suggest osimertinib(80 mg)adjuvant therapy ...Clinical Question How to choose the drugs of adjuvant therapy for nonsmall-cell lung cancer(NSCLC)patients harboring driver gene mutation?Recommendations Recommendation 1:We suggest osimertinib(80 mg)adjuvant therapy in stage Ib–IIIa EGFR-positive(Ex19del or L858R)NSCLC patients after surgery.According to the results of the ADAURA study,the benefit of osimertinib administration increases with advancing tumor stage.(Strong recommendation,high certainty of evidence)展开更多
基金supported by the National Natural Science Foundation of China(21871005 and 21501005).
文摘In our work,we demonstrated network PtCu nanocrystals,in which the tuneable composition,clean surface,and ultrasmall size(diameter<5 nm)endow them with excellent electrocatalytic performances in both N_(2)reduction reaction under ambient conditions and methanol oxidation.A detailed investigation suggests that their electrocatalytic activity is highly composition dependent.We confirmed the production of NH3 from N_(2)through a systematic study.The optimum Pt_(6)Cu nanoalloys exhibit 2.3-fold and 20.6-fold increase in reduction activity toward N_(2)compared with Pt and Cu nanocrystals.Their faradaic efficiency value was also highly improved.Moreover,these bifunctional Pt_(6)Cu nanostructures also show excellent catalytic properties during methanol electrooxidation.The specific activity toward methanol oxidation reaches up to 21.3 mA cm^(−2),which is 3.6 times that of commercial Pt/C catalysts.This work thus provides a promising approach to design the alloy composition for bi-or multi-functional applications.
基金supported by the Major State Basic Research Development Program(2013CB922102)the National Natural Science Foundation of China(21571097 and 21171089)+1 种基金the Natural Science Foundation of Jiangsu Province of China(BK20130054 and BK20151542)the Specialized Research Fund for the Doctoral Program of Higher Education and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions。
文摘The magnetic relaxation and magnetization blocking barriers of butterfly complexes,[Dy_(2)Zn_(2)(L)_(4)(NO_(3))_(2)(CH_(3)OH)_(2)](1),[Dy_(2)Mn_(2)(L)_(4)(NO_(3))_(2)(DMF)_(2)](2)and[Dy_(2)Co_(2)(L)_(4)(NO_(3))_(2)(DMF)_(2)]·2DMF(3)(H_(2)L=(E)-2-ethoxy-6-(((2-hydroxyphenyl)imino)methyl)phenol),were systematically investigated.The change of SMM behavior originating from the purposeful replacement of two ZnII sites in 1 with MnII and CoII was elucidated by a combined experimental and theoretical study.The quantum tunnelling of magnetization(QTM)was observed in 1.Contrarily,it was quenched in 2 and 3 by spin-spin exchange.A detailed comparative study on these closely-related model complexes reveals the remarkable changes of the ligand field splitting,anisotropy of the Dy-coordinated moiety and the total exchange spectrum due to the replacement of ZnII with CoII and MnII.
文摘DearEditors-in-Chief,We read with interest the paper by Su et al.(2025)describing a soil incubation study.The paper provides useful data on the effect of wollastonite addition on CO_(2)emission/capture and soil properties.However,one of the main conclusions appears to directly contradict the data,perpetuating the unsupported notion that a significant amount of CO_(2)is captured during weathering of crushed silicate rockmixed into acidicsoil.
文摘Clinical Question How to choose the drugs of adjuvant therapy for nonsmall-cell lung cancer(NSCLC)patients harboring driver gene mutation?Recommendations Recommendation 1:We suggest osimertinib(80 mg)adjuvant therapy in stage Ib–IIIa EGFR-positive(Ex19del or L858R)NSCLC patients after surgery.According to the results of the ADAURA study,the benefit of osimertinib administration increases with advancing tumor stage.(Strong recommendation,high certainty of evidence)
