Heterogeneous metal atom doping is considered as an effective strategy to boost catalytic activity through the coordinated modulation of metal active sites and the electronic structure,which is also beneficial for est...Heterogeneous metal atom doping is considered as an effective strategy to boost catalytic activity through the coordinated modulation of metal active sites and the electronic structure,which is also beneficial for establishing the relationship between structure and performance in energy conversion devices.Herein,we developed Mo-doped NiSe hierarchical microspheres with different Mo doping amounts by a simple solvothermal method.DFT calculation results including the more appropriate adsorption energy for adsorption of I_(3)^(-),the further elongated I_(1)-I_(2)bond length of I_(3)^(-),and efficient interaction between metal 3d and I 5p states collectively indicated that the catalytic activity for the IRR can be significantly enhanced by doping molybdenum in NiSe.Subsequently,dye-sensitized solar cells(DSSCs)fabricated with the optimized Mo_(0.10)-NiSe display a remarkable power conversion efficiency of 8.92%,superior to that of the Mo_(0.05)-NiSe(8.40%),Mo_(0.15)-NiSe(8.62%),NiSe(7.51%),and Pt-based devices(7.74%)in comparison.The impressive performance endows Mo_(0.10)-NiSe with a new opportunity to achieve the substitution of noble Pt in low-cost DSSCs.展开更多
基金support of the National Natural Science Foundation of China(22005161)the Fundamental Research Funds in Heilongjiang Provincial Universities of China(145109209)the Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary(BMHXJKF006).
文摘Heterogeneous metal atom doping is considered as an effective strategy to boost catalytic activity through the coordinated modulation of metal active sites and the electronic structure,which is also beneficial for establishing the relationship between structure and performance in energy conversion devices.Herein,we developed Mo-doped NiSe hierarchical microspheres with different Mo doping amounts by a simple solvothermal method.DFT calculation results including the more appropriate adsorption energy for adsorption of I_(3)^(-),the further elongated I_(1)-I_(2)bond length of I_(3)^(-),and efficient interaction between metal 3d and I 5p states collectively indicated that the catalytic activity for the IRR can be significantly enhanced by doping molybdenum in NiSe.Subsequently,dye-sensitized solar cells(DSSCs)fabricated with the optimized Mo_(0.10)-NiSe display a remarkable power conversion efficiency of 8.92%,superior to that of the Mo_(0.05)-NiSe(8.40%),Mo_(0.15)-NiSe(8.62%),NiSe(7.51%),and Pt-based devices(7.74%)in comparison.The impressive performance endows Mo_(0.10)-NiSe with a new opportunity to achieve the substitution of noble Pt in low-cost DSSCs.
