Decoration of metal-organic framework(MOF)has been considered as an effective route to improve the photoelectrochemical(PEC)performance of TiO_(2),but there is still a lack of understanding of the regulatory structure...Decoration of metal-organic framework(MOF)has been considered as an effective route to improve the photoelectrochemical(PEC)performance of TiO_(2),but there is still a lack of understanding of the regulatory structure.Herein,Ni-MOF was rationally introduced by in-situ etching method,which helps for artificially regulating the coordination state of Ni sites.The photocurrent density(0.81 mA/cm^(2))and IPCE value(33.1%)of TiO_(2)-MOF-2 are about twice higher than that of pristine TiO_(2) due to the rich unsaturated sites of Ni-MOF.Meanwhile,the saturated coordination has caused the decline of PEC performance because of the obvious steric hindrance.Therefore,this work presents an insight for the effect of coordination state on PEC activity especially in MOF system.展开更多
[Cu_(0.84)Au_(0.16)(PPh_3)_2(SC(Ph)NHPh)Cl]·0.5CS_2=,Mr=895.79,monoclinic,space group P2_1/a,a=17.231(3),b=14.611(2),c=18.000(3) ,β=105.56(2)°,V=4365(1) ~3, Z=4,D_c=1.37g/cm^3.,λ(MoK_α)=0.71073 ,μ=12.15c...[Cu_(0.84)Au_(0.16)(PPh_3)_2(SC(Ph)NHPh)Cl]·0.5CS_2=,Mr=895.79,monoclinic,space group P2_1/a,a=17.231(3),b=14.611(2),c=18.000(3) ,β=105.56(2)°,V=4365(1) ~3, Z=4,D_c=1.37g/cm^3.,λ(MoK_α)=0.71073 ,μ=12.15cm^(-1),F(000)=1855,R=0.052, R_W=0.045 for 3930 observed reflections with Ⅰ>1.5σ(Ⅰ).The central metal atom has a dis. torted tetrahedral geometry with bond lengths Cu-S=2.384(2) (Au-S=2.389(4)), Cu-Cl=2.481(3)(Au-Cl=2.474(1))and Cu-P=2.269(2)-2.289(2)(Au-P=2.270(4)-2.279(4)) .展开更多
The evolved gaseous analysis (EGA),infrared spectra,and XRD have been applied to the study of solid state reactions of KSCN with five cobalt(Ⅲ)-ammine complexes:[Co- (NH_3)_5N_3]Cl_2,[Co(NH_3)_5(NO_2)]Cl_2,[Co(NH_3)_...The evolved gaseous analysis (EGA),infrared spectra,and XRD have been applied to the study of solid state reactions of KSCN with five cobalt(Ⅲ)-ammine complexes:[Co- (NH_3)_5N_3]Cl_2,[Co(NH_3)_5(NO_2)]Cl_2,[Co(NH_3)_5(H_2O)]Cl_3,[Co(NH_3)_5Cl]Cl_2,and [Co(NH_3)_6]Cl_3 in a hydrogen atmosphere.It is found that the existence of KSCN shifts the thermal decom- position of these complexes to a lower temperature.The corresponding peak temperatures are near 140℃.The effect of KSCN is discussed and kinetic parameters of deammine reactions are calculated.展开更多
Oxygen evolution reactions(OER)are critical to electrochemical syn-thesis reactions,including hydrogen production and organic hydroge-nation.However,the high cost of existing OER catalysts(primarily Ir/Ru and its deri...Oxygen evolution reactions(OER)are critical to electrochemical syn-thesis reactions,including hydrogen production and organic hydroge-nation.However,the high cost of existing OER catalysts(primarily Ir/Ru and its derived oxides)limits their practical application for electro-chemical synthesis.To develop a low‐cost,high‐efficiency alternative,we need a deeper understanding of both the mechanisms that drive OER and the relationship between the catalyst's electronic structure and active sites.Here,we summarized recent developments of catalysts,especially focusing on the electronic structure modulation strategies and their subsequent activity enhancement.Most importantly,we pointed out the study directions for further work.展开更多
基金the Start Up Foundation of Jiangsu University(11JDG153).
文摘Decoration of metal-organic framework(MOF)has been considered as an effective route to improve the photoelectrochemical(PEC)performance of TiO_(2),but there is still a lack of understanding of the regulatory structure.Herein,Ni-MOF was rationally introduced by in-situ etching method,which helps for artificially regulating the coordination state of Ni sites.The photocurrent density(0.81 mA/cm^(2))and IPCE value(33.1%)of TiO_(2)-MOF-2 are about twice higher than that of pristine TiO_(2) due to the rich unsaturated sites of Ni-MOF.Meanwhile,the saturated coordination has caused the decline of PEC performance because of the obvious steric hindrance.Therefore,this work presents an insight for the effect of coordination state on PEC activity especially in MOF system.
基金Project supported by the National Natural Science Foundation of China
文摘[Cu_(0.84)Au_(0.16)(PPh_3)_2(SC(Ph)NHPh)Cl]·0.5CS_2=,Mr=895.79,monoclinic,space group P2_1/a,a=17.231(3),b=14.611(2),c=18.000(3) ,β=105.56(2)°,V=4365(1) ~3, Z=4,D_c=1.37g/cm^3.,λ(MoK_α)=0.71073 ,μ=12.15cm^(-1),F(000)=1855,R=0.052, R_W=0.045 for 3930 observed reflections with Ⅰ>1.5σ(Ⅰ).The central metal atom has a dis. torted tetrahedral geometry with bond lengths Cu-S=2.384(2) (Au-S=2.389(4)), Cu-Cl=2.481(3)(Au-Cl=2.474(1))and Cu-P=2.269(2)-2.289(2)(Au-P=2.270(4)-2.279(4)) .
文摘The evolved gaseous analysis (EGA),infrared spectra,and XRD have been applied to the study of solid state reactions of KSCN with five cobalt(Ⅲ)-ammine complexes:[Co- (NH_3)_5N_3]Cl_2,[Co(NH_3)_5(NO_2)]Cl_2,[Co(NH_3)_5(H_2O)]Cl_3,[Co(NH_3)_5Cl]Cl_2,and [Co(NH_3)_6]Cl_3 in a hydrogen atmosphere.It is found that the existence of KSCN shifts the thermal decom- position of these complexes to a lower temperature.The corresponding peak temperatures are near 140℃.The effect of KSCN is discussed and kinetic parameters of deammine reactions are calculated.
基金Shenzhen fundamental research funding,Grant/Award Numbers:JCYJ20200109141216566,JCYJ20210324115809026,JCYJ20220818100212027Guangdong scientific program,Grant/Award Number:2019QN01L057+2 种基金National Key Research and Development Project,Grant/Award Numbers:2022YFA1203400,2022YFA1503900Southern University of Science and TechnologyDevelopment and Reform Commission of Shenzhen Municipality。
文摘Oxygen evolution reactions(OER)are critical to electrochemical syn-thesis reactions,including hydrogen production and organic hydroge-nation.However,the high cost of existing OER catalysts(primarily Ir/Ru and its derived oxides)limits their practical application for electro-chemical synthesis.To develop a low‐cost,high‐efficiency alternative,we need a deeper understanding of both the mechanisms that drive OER and the relationship between the catalyst's electronic structure and active sites.Here,we summarized recent developments of catalysts,especially focusing on the electronic structure modulation strategies and their subsequent activity enhancement.Most importantly,we pointed out the study directions for further work.
