Structural Characterization of Rh and RhAu Dendrimer-Encapsulated Nanoparticles

被引：16
|
作者：
Luo, Long [1 ,2 ,4 ]
Timoshenko, Janis [3 ]
Lapp, Aliya S. [1 ,2 ]
Frenkel, Anatoly I. [3 ]
Crooks, Richard M. [1 ,2 ]
机构：
[1] Univ Texas Austin, Dept Chem, 105 E 24th St,Stop A5300, Austin, TX 78712 USA
[2] Univ Texas Austin, Texas Mat Inst, 105 E 24th St,Stop A5300, Austin, TX 78712 USA
[3] SUNY Stony Brook, Dept Mat Sci & Chem Engn, Stony Brook, NY 11794 USA
[4] Wayne State Univ, Dept Chem, 5101 Cass Ave, Detroit, MI 48202 USA
来源：
LANGMUIR | 2017年 / 33卷 / 43期
基金：
美国国家科学基金会;
关键词：
NEAR-EDGE STRUCTURE; CO OXIDATION; BIMETALLIC NANOPARTICLES; METAL NANOPARTICLES; ALLOY NANOPARTICLES; AU-RH; HYDROGENATION; CATALYSTS; PD; SHELL;
D O I：
10.1021/acs.langmuir.7b02857
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report the structural characterization of 1-2 nm Rh and RhAu alloy dendrimer-encapsulated nanoparticles (DENs) prepared by chemical reduction with NaBH4. In contrast to previously reported results, in situ and ex situ X-ray absorption spectroscopic experiments indicate that only a fraction of the Rh3+ present in the precursors are reduced by NaBH4. Additional structural analysis of RhAu alloy DENs using extended Xray absorption fine structure spectroscopy leads to a model in which there is significant segregation of Rh and Au within the nanoparticles. In Rh-rich alloy DENs, Au atoms are segregated on the nanoparticle surface.
引用
收藏
页码：12434 / 12442
页数：9
相关论文
共 50 条
  • [1] Synthesis and Characterization of NiSn Dendrimer-Encapsulated Nanoparticles
    Gates, Arther T.
    Nettleton, Elizabeth G.
    Myers, V. Sue
    Crooks, Richard M.
    LANGMUIR, 2010, 26 (15) : 12994 - 12999
  • [2] Synthesis, characterization, and applications of dendrimer-encapsulated nanoparticles
    Scott, RWJ
    Wilson, OM
    Crooks, RM
    JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (02): : 692 - 704
  • [3] Structural Analysis of PdAu Dendrimer-Encapsulated Bimetallic Nanoparticles
    Weir, Michael G.
    Knecht, Marc R.
    Frenkel, Anatoly I.
    Crooks, Richard M.
    LANGMUIR, 2010, 26 (02) : 1137 - 1146
  • [4] Dendrimer-encapsulated nanoparticles: Synthesis, characterization, and applications.
    Crooks, RM
    Zhao, MQ
    Chechik, V
    Sun, L
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1999, 218 : U167 - U167
  • [5] Synthesis, characterization, and stability of dendrimer-encapsulated palladium nanoparticles
    Scott, RWJ
    Ye, HC
    Henriquez, RR
    Crooks, RM
    CHEMISTRY OF MATERIALS, 2003, 15 (20) : 3873 - 3878
  • [6] Synthesis, characterization, and magnetism of dendrimer-encapsulated Co nanoparticles
    Bradshaw, Marquita D.
    Knecht, Marc R.
    Crooks, Richard M.
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2006, 231
  • [7] Synthesis and characterization of dendrimer-encapsulated metal oxide nanoparticles
    Fahlman, Bradley D.
    Carter, Katelyn E.
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2006, 231
  • [8] Fabrication and characterization of dendrimer-encapsulated monometallic Co nanoparticles
    Kavas, H.
    Durmus, Z.
    Tanriverdi, E.
    Senel, M.
    Sozeri, H.
    Baykal, A.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (17) : 5341 - 5348
  • [9] Dendrimer-encapsulated Pt nanoparticles: Synthesis, characterization, and applications to catalysis
    Zhao, MQ
    Crooks, RM
    ADVANCED MATERIALS, 1999, 11 (03) : 217 - +
  • [10] Dendrimer-encapsulated metal nanoparticles: Synthesis, characterization, and applications to catalysis
    Crooks, RM
    Zhao, MQ
    Sun, L
    Chechik, V
    Yeung, LK
    ACCOUNTS OF CHEMICAL RESEARCH, 2001, 34 (03) : 181 - 190
12345