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Issue 9, 2015
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Synthesis of palladium nanoparticles on TiO2(110) using a beta-diketonate precursor

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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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Publication details

The article was received on 09 Dec 2014, accepted on 29 Jan 2015 and first published on 30 Jan 2015


Article type: Paper
DOI: 10.1039/C4CP05761A
Citation: 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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