Synthesis of palladium nanoparticles on TiO2(110) using a beta-diketonate precursor

被引：6
作者：
Lei, Yu [1 ,2 ]
Liu, Bin [3 ]
Lu, Junling [4 ,5 ]
Lin, Xiao [6 ,7 ]
Gao, Li [8 ]
Guisinger, Nathan P. [9 ]
Greeley, Jeffrey P. [10 ]
Elam, Jeffrey W. [1 ]
机构：
[1] Argonne Natl Lab, Div Energy Syst, Lemont, IL 60439 USA
[2] Univ Alabama, Dept Chem & Mat Engn, Huntsville, AL 35899 USA
[3] Kansas State Univ, Dept Chem Engn, Manhattan, KS 66506 USA
[4] Univ Sci & Technol China, Dept Chem Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
[5] Univ Sci & Technol China, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China
[6] Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[7] Chinese Acad Sci, Inst Phys, Beijing 100049, Peoples R China
[8] Calif State Univ Northridge, Dept Phys & Astron, Northridge, CA 91330 USA
[9] Argonne Natl Lab, Ctr Nanoscale Mat, Lemont, IL 60439 USA
[10] Purdue Univ, Sch Chem Engn, W Lafayette, IN 47907 USA
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 09期
基金：
美国国家科学基金会;
关键词：
ATOMIC LAYER DEPOSITION; REFLECTION-ABSORPTION SPECTROSCOPY; TEMPERATURE-PROGRAMMED DESORPTION; SCANNING-TUNNELING-MICROSCOPY; AUGMENTED-WAVE METHOD; SURFACE-CHEMISTRY; MO(110) SURFACE; PD ATOMS; ADSORPTION; NUCLEATION;
D O I：
10.1039/c4cp05761a
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The adsorption of palladium hexafluoracetylacetone (Pd(hfac)(2)) and nucleation of Pd nanoparticles on TiO2(110) surface were observed using scanning tunneling microscopy (STM). Surface species of Pd(hfac)* and Ti(hfac)* uniformly adsorbed on TiO2(110) upon exposure of Pd(hfac)(2). No preferential nucleation was observed for the surface species. Atomic resolution STM images revealed that both Pd(hfac)* and Ti(hfac)* appeared on the metastable Ti(5c) sites. After annealing at 700 K, sub-nm Pd nanoparticles were observed across the TiO2(110) without preferential nucleation. The adsorption preferences of Pd(hfac), hfac, and atomic Pd on TiO2(110) surface were studied using density functional theory (DFT), and possible decomposition pathways of Pd(hfac) 2 leading to the formation of Pd nucleation sites were presented.
引用
收藏
页码：6470 / 6477
页数：8
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