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

doi:10.1016/j.nanoen.2017.12.039

	Surface step decoration of isolated atom as electron pumping: Atomic-level insights into visible-light hydrogen evolution
	Wu, X; Zhang, HB; Dong, JC; Qiu, M; Kong, JT; Zhang, YF; Li, Y; Xu, GL; Zhang, J; Ye, JH
刊名	NANO ENERGY
	2018
卷号	45 页码:109-117
关键词	Isolated atom Surface step Hydrogen evolution Electron pumping Catalysis
ISSN号	2211-2855
DOI	10.1016/j.nanoen.2017.12.039
文献子类	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.
电子版国际标准刊号	2211-3282
WOS关键词	INITIO MOLECULAR-DYNAMICS ; PHOTOCATALYTIC H-2 EVOLUTION ; AUGMENTED-WAVE METHOD ; SINGLE-ATOM ; PREFERENTIAL OXIDATION ; CERIA CATALYSTS ; CDS NANOWIRES ; SEMICONDUCTOR ; GRAPHENE ; METALS
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000425396400014
内容类型	期刊论文
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[J]. NANO ENERGY,2018,45:109-117.
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.