DICP OpenIR
One-phase controlled synthesis of Au-25 nanospheres and nanorods from 1.3 nm Au : PPh3 nanoparticles: the ligand effects
Lin, Jizhi1,2,3; Li, Weili4; Liu, Chao1,2; Huang, Pan1,2; Zhu, Manzhou3; Ge, Qingjie4; Li, Gao1,2
Source PublicationNANOSCALE
2015
DOI10.1039/c5nr02638e
Volume7Issue:32Pages:13663-13670
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordCRYSTAL-STRUCTURE ; GOLD NANOCLUSTER ; CO OXIDATION ; OPTICAL-PROPERTIES ; GROWTH-MECHANISM ; CLUSTERS ; AU-25(SCH2CH2PH)(18) ; CONVERSION ; CATALYSTS
AbstractWe report the controlled synthesis of [Au-25(PPh3)(10)(SR1)(5)X-2](2+) nanorods (H-SR1: alkyl thiol, H-SC2H4Ph and H-S(n-C6H13)) and Au-25(SR2)(18) nanospheres (H-SR2: aromatic thiol, H-SPh and H-SNap) under the one-phase thiol etching reaction of the polydisperse Au-n(PPh3)(m) parent-particles (core diameter: 1.3 +/- 0.4 nm, 20 < n < 50). These as-obtained gold nanoclusters are identified by UV-vis spectroscopy and matrix-assisted laser desorption ionization mass spectrometry. Furthermore, the conversion process, from Au-n(PPh3)(m) nanoparticles to Au-25(SNap)(18) nanospheres, is monitored by UV-vis spectroscopy. It is observed that the Au-25(PPh3)(10)(SR1)(5)X-2 nanorods cannot convert to Au-25(SR)(18) nanospheres in the presence of excess thiol (both the alkyl and aromatic thiol) even under thermal conditions (e.g., 55 and 80 degrees C), indicating that both the Au-25 nanorods and nanospheres are in a stable state during the alkyl and aromatic thiol etching reactions, respectively. The two different conversion pathways (i.e., to Au-25(PPh3)(10)(SR1)(5)X-2 nanorods and Au-25(SR2)(18) nanospheres) mainly are attributed to the different electronic properties and the steric effects of the alkyl and aromatic thiol ligands. The significant ligand effect also is observed in catalytic CO oxidation. The Au-25(SC2H4Ph)(18)/CeO2 catalyst shows catalytic activity at 80 degrees C and reaches up to 80.7% and 98.5% (based on CO conversion) at 100 and 150 degrees C, while Au-25(SNap)(18)/CeO2 and Au-25(PPh3)(10)(SC2H4Ph)(5)X-2/CeO2 give rise to a low activity at 100 degrees C with only 3.3% and 10.2% CO conversion and 98.0% and 94.6% at 150 degrees C.
Language英语
WOS IDWOS:000359234100045
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/146450
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Gold Catalysis Researcher Ctr, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Anhui Univ, Coll Chem & Chem Engn, Hefei 230601, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy DNL, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Lin, Jizhi,Li, Weili,Liu, Chao,et al. One-phase controlled synthesis of Au-25 nanospheres and nanorods from 1.3 nm Au : PPh3 nanoparticles: the ligand effects[J]. NANOSCALE,2015,7(32):13663-13670.
APA Lin, Jizhi.,Li, Weili.,Liu, Chao.,Huang, Pan.,Zhu, Manzhou.,...&Li, Gao.(2015).One-phase controlled synthesis of Au-25 nanospheres and nanorods from 1.3 nm Au : PPh3 nanoparticles: the ligand effects.NANOSCALE,7(32),13663-13670.
MLA Lin, Jizhi,et al."One-phase controlled synthesis of Au-25 nanospheres and nanorods from 1.3 nm Au : PPh3 nanoparticles: the ligand effects".NANOSCALE 7.32(2015):13663-13670.
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