Rare earth element-enhanced TiO2 achieves high-efficiency photocatalytic overall water splitting Photocatalytic water splitting is a clean energy technology that uses sunlight to split water into oxygen and hydrogen i...Rare earth element-enhanced TiO2 achieves high-efficiency photocatalytic overall water splitting Photocatalytic water splitting is a clean energy technology that uses sunlight to split water into oxygen and hydrogen in order to produce green hydrogen,a clean fuel,without relying on fossil fuels.The process is driven by a photocatalyst.While titanium dioxide(TiO2)has long been studied as a promising semiconductor for photocatalytic water splitting,its efficiency has been hindered by rapid charge recombination and insufficient charge separation.展开更多
To solve the problem of hydrogen utilization in water splitting,it is necessary to develop earth-abundant,productive,and stable electrocatalysts for the hydrogen evolution reaction(HER)instead of platinum-based metal ...To solve the problem of hydrogen utilization in water splitting,it is necessary to develop earth-abundant,productive,and stable electrocatalysts for the hydrogen evolution reaction(HER)instead of platinum-based metal catalysts.Here,a cobalt(Co)carbonate hydroxide@amorphous Co-metal-organic frame-work(CoCH@Co-MOF)core-shell nanowire is grown on carbon fiber paper using a wet-chemistry method for the HER in alkaline electrolyte.The CoCH@Co-MOF exhibits small overpotential,small Tafel slope,and large exchange current density in the HER because of its large electrochemical reaction sur-faces.In addition,one-dimensional morphology is beneficial to charge conduction,and the amorphous MOF framework endows CoCH@Co-MOF with efficient catalytic activities.The CoCH@Co-MOF nanowire is therefore promising in the HER because of its low cost,high efficiency,excellent stability,and easy operation.展开更多
文摘Rare earth element-enhanced TiO2 achieves high-efficiency photocatalytic overall water splitting Photocatalytic water splitting is a clean energy technology that uses sunlight to split water into oxygen and hydrogen in order to produce green hydrogen,a clean fuel,without relying on fossil fuels.The process is driven by a photocatalyst.While titanium dioxide(TiO2)has long been studied as a promising semiconductor for photocatalytic water splitting,its efficiency has been hindered by rapid charge recombination and insufficient charge separation.
基金Z.Huang thanks the National Natural Science Foundation of China(51772214)the National Youth Talent Support Program(W03070073)for support+4 种基金C.Zhang thanks the National Natural Science Foundation of China(51432006)the Ministry of Science and Technology of China(2011DFG52970)the Ministry of Education of China(IRT14R23)the 111 Project(B13025)the Innovation Program of Shanghai Municipal Education Commission for support.
文摘To solve the problem of hydrogen utilization in water splitting,it is necessary to develop earth-abundant,productive,and stable electrocatalysts for the hydrogen evolution reaction(HER)instead of platinum-based metal catalysts.Here,a cobalt(Co)carbonate hydroxide@amorphous Co-metal-organic frame-work(CoCH@Co-MOF)core-shell nanowire is grown on carbon fiber paper using a wet-chemistry method for the HER in alkaline electrolyte.The CoCH@Co-MOF exhibits small overpotential,small Tafel slope,and large exchange current density in the HER because of its large electrochemical reaction sur-faces.In addition,one-dimensional morphology is beneficial to charge conduction,and the amorphous MOF framework endows CoCH@Co-MOF with efficient catalytic activities.The CoCH@Co-MOF nanowire is therefore promising in the HER because of its low cost,high efficiency,excellent stability,and easy operation.
