Issue 9, 2015
From the journal:

Physical Chemistry Chemical Physics

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

Yu Lei,*ab   Bin Liu,c   Junling Lu,d   Xiao Lin,e   Li Gao,f   Nathan P. Guisinger,g   Jeffrey P. Greeleyh  and  Jeffrey W. Elam*a  

* Corresponding authors

a Energy Systems Division, Argonne National Laboratory, Lemont, IL 60439, USA
E-mail: jelam@anl.gov
Tel: +1-630-252-3520

b Department of Chemical and Materials Engineering, University of Alabama in Huntsville, Huntsville, AL 35899, USA
E-mail: yu.lei@uah.edu
Tel: +1-256-824-6527

c Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA

d Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, China

e University of Chinese Academy of Sciences & Institute of Physics, Chinese Academy of Sciences, Beijing 100049, China

f Department of Physics and Astronomy, California State University Northridge, CA 91330, USA

g Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL 60439, USA

h School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA

Abstract

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.

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

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Article information

DOI
https://doi.org/10.1039/C4CP05761A
Article type
Paper
Submitted
09 Dec 2014
Accepted
29 Jan 2015
First published
30 Jan 2015

Phys. Chem. Chem. Phys., 2015,17, 6470-6477

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

Y. Lei, B. Liu, J. Lu, X. Lin, L. Gao, N. P. Guisinger, J. P. Greeley and J. W. Elam, Phys. Chem. Chem. Phys., 2015, 17, 6470 DOI: 10.1039/C4CP05761A

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