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Surface step decoration of isolated atom as electron pumping: Atomic-level insights into visible-light hydrogen evolution

文献类型：期刊论文

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作者Wu, X; Zhang, HB; Dong, JC; Qiu, M; Kong, JT; Zhang, YF; Li, Y; Xu, GL; Zhang, J; Ye, JH
刊名NANO ENERGY ; NANO ENERGY
出版日期2018 ; 2018
卷号45页码:109-117
关键词Isolated atom Isolated atom Surface step Hydrogen evolution Electron pumping Catalysis Surface step Hydrogen evolution Electron pumping Catalysis
ISSN号2211-2855 ; 2211-2855
DOI10.1016/j.nanoen.2017.12.039 ; 10.1016/j.nanoen.2017.12.039
文献子类Article ; Article
英文摘要Here we realize the decoration of isolated platinum atoms onto the surface step of CdS nanowires. The single-atom co-catalyst with high stability can realize maximum atom efficiency and significantly boost electron-hole separation efficiency in chromophore units, generating a greatly enhanced photocatalytic hydrogen evolution performance, 7.69 times as high as Pt nanoparticles do and 63.77 times higher than that of bare CdS nanowires. Directional migrations of photogenerated excitons from the conduction band of CdS to catalytic platinum centers have been witnessed by transient absorption spectroscopy, leading to the supply of long-lived electrons for highly efficient photocatalytic hydrogen evolution. Density functional theory calculations further confirm that the excellent catalytic performance is associated with positively charged platinum sites with partially vacant 5d orbitals, which change distribution of charge density and facilitate higher excited carrier density.; Here we realize the decoration of isolated platinum atoms onto the surface step of CdS nanowires. The single-atom co-catalyst with high stability can realize maximum atom efficiency and significantly boost electron-hole separation efficiency in chromophore units, generating a greatly enhanced photocatalytic hydrogen evolution performance, 7.69 times as high as Pt nanoparticles do and 63.77 times higher than that of bare CdS nanowires. Directional migrations of photogenerated excitons from the conduction band of CdS to catalytic platinum centers have been witnessed by transient absorption spectroscopy, leading to the supply of long-lived electrons for highly efficient photocatalytic hydrogen evolution. Density functional theory calculations further confirm that the excellent catalytic performance is associated with positively charged platinum sites with partially vacant 5d orbitals, which change distribution of charge density and facilitate higher excited carrier density.
电子版国际标准刊号2211-3282 ; 2211-3282
WOS关键词INITIO MOLECULAR-DYNAMICS ; INITIO MOLECULAR-DYNAMICS ; PHOTOCATALYTIC H-2 EVOLUTION ; AUGMENTED-WAVE METHOD ; SINGLE-ATOM ; PREFERENTIAL OXIDATION ; CERIA CATALYSTS ; CDS NANOWIRES ; SEMICONDUCTOR ; GRAPHENE ; METALS ; PHOTOCATALYTIC H-2 EVOLUTION ; AUGMENTED-WAVE METHOD ; SINGLE-ATOM ; PREFERENTIAL OXIDATION ; CERIA CATALYSTS ; CDS NANOWIRES ; SEMICONDUCTOR ; GRAPHENE ; METALS
WOS研究方向Chemistry ; Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语 ; 英语
WOS记录号WOS:000425396400014 ; WOS:000425396400014
源URL[http://ir.ihep.ac.cn/handle/311005/285663]  
专题高能物理研究所_加速器中心
高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714		 Wu, X,Zhang, HB,Dong, JC,et al. Surface step decoration of isolated atom as electron pumping: Atomic-level insights into visible-light hydrogen evolution, Surface step decoration of isolated atom as electron pumping: Atomic-level insights into visible-light hydrogen evolution[J]. NANO ENERGY, NANO ENERGY,2018, 2018,45, 45:109-117, 109-117.
APA Wu, X.,Zhang, HB.,Dong, JC.,Qiu, M.,Kong, JT.,...&董俊才.(2018).Surface step decoration of isolated atom as electron pumping: Atomic-level insights into visible-light hydrogen evolution.NANO ENERGY,45,109-117.
MLA Wu, X,et al."Surface step decoration of isolated atom as electron pumping: Atomic-level insights into visible-light hydrogen evolution".NANO ENERGY 45(2018):109-117.

入库方式： OAI收割

来源：高能物理研究所

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