CdS nanospheres were grown on indium tin oxide(ITO)substrate using a hydrothermal method.The crystal structure,morphology and electronic structure of the samples synthesized were characterized in detail.The results co...CdS nanospheres were grown on indium tin oxide(ITO)substrate using a hydrothermal method.The crystal structure,morphology and electronic structure of the samples synthesized were characterized in detail.The results confirm that the crystallinity,size,crystal defects of the CdS nanospheres and the film thickness of CdS photoelectrodes can be tuned by varying the precursor Cd2+concentration.Combined with charge transfer dynamics analysis,it can be found that proper particle size and film thickness,as well as fewer defects,will result in better charge separation efficiency of the prepared CdS/ITO photoelectrodes,thereby exhibiting better photoelectrochemical performance for water splitting.The optimized CdS/ITO photoelectrode synthesized with a Cd2+concentration of 0.14 mol⋅L1 gave a photocurrent density of 5.10 mA⋅cm^(-2)at potential of 1.23 V versus the reversible hydrogen electrode(RHE),under a simulated solar illumination of 100 mW⋅cm^(-2).展开更多
Alkaline hydrogen evolution reaction(HER)is suppressed by the water dissociation,leading to more sluggish kinetics than acidic HER.Developing multifunction catalysts via constructing heterogeneous interfaces is a feas...Alkaline hydrogen evolution reaction(HER)is suppressed by the water dissociation,leading to more sluggish kinetics than acidic HER.Developing multifunction catalysts via constructing heterogeneous interfaces is a feasible tactic to accelerate the alkaline HER.Herein,NiO coupled with Ni and MoxN(NMN)nanorods were prepared via a hydro-thermal synthesis combined with a thermal decomposition under ammonia atmosphere.The low crystalline NMN nanorods are rich in heterointerfaces,and have sufficient high active sites for HER.The synergistic effect between NiO and Ni-MoxN promotes the water dissociation the hydrogen adsorption,and the charge transfer,contributing to excellent alkaline HER activity.The overpotential on NMN is only 36 and 150 mV for the current density of 10 and 300 mA cm^(-2),respectively,and the Tafel slope is 48 mV/dec,demonstrating a superior performance for alkaline HER,which is even comparable to the commercial electrocatalysts.展开更多
基金supported by National Key R&D Program of China(2022YFF0705104)National Natural Science Foundation of China(51402199,U21A20316)+1 种基金Liaoning Revitalization Talents Prograrn(XLYC2007193)Natural Science Foundation of Liaoning Province(2021NLTS1210).
文摘CdS nanospheres were grown on indium tin oxide(ITO)substrate using a hydrothermal method.The crystal structure,morphology and electronic structure of the samples synthesized were characterized in detail.The results confirm that the crystallinity,size,crystal defects of the CdS nanospheres and the film thickness of CdS photoelectrodes can be tuned by varying the precursor Cd2+concentration.Combined with charge transfer dynamics analysis,it can be found that proper particle size and film thickness,as well as fewer defects,will result in better charge separation efficiency of the prepared CdS/ITO photoelectrodes,thereby exhibiting better photoelectrochemical performance for water splitting.The optimized CdS/ITO photoelectrode synthesized with a Cd2+concentration of 0.14 mol⋅L1 gave a photocurrent density of 5.10 mA⋅cm^(-2)at potential of 1.23 V versus the reversible hydrogen electrode(RHE),under a simulated solar illumination of 100 mW⋅cm^(-2).
基金financially supported by National Key R&D Program of China(2022YFF0705104)National Natural Science Foundation of China(51402199,U21A20316)+2 种基金Liaoning Revitalization Talents Program(XLYC2007193)Natural Science Foundation of Liaoning Province(2022-MS-289,2021NLTS1210)Scientific Research Foundation of Education Department of Liaoning Province(LJKZ0457).
文摘Alkaline hydrogen evolution reaction(HER)is suppressed by the water dissociation,leading to more sluggish kinetics than acidic HER.Developing multifunction catalysts via constructing heterogeneous interfaces is a feasible tactic to accelerate the alkaline HER.Herein,NiO coupled with Ni and MoxN(NMN)nanorods were prepared via a hydro-thermal synthesis combined with a thermal decomposition under ammonia atmosphere.The low crystalline NMN nanorods are rich in heterointerfaces,and have sufficient high active sites for HER.The synergistic effect between NiO and Ni-MoxN promotes the water dissociation the hydrogen adsorption,and the charge transfer,contributing to excellent alkaline HER activity.The overpotential on NMN is only 36 and 150 mV for the current density of 10 and 300 mA cm^(-2),respectively,and the Tafel slope is 48 mV/dec,demonstrating a superior performance for alkaline HER,which is even comparable to the commercial electrocatalysts.
