Morphology, Stability, Structure, and CO2-Surface Chemistry of Micelle Nanolithographically Prepared Two-Dimensional Arrays of Core-Shell Fe-Pd Multicomponent Nanoparticles

Bera, Anupam and Banerjee, Sourav and Bhattacharya, Atanu (2018) Morphology, Stability, Structure, and CO2-Surface Chemistry of Micelle Nanolithographically Prepared Two-Dimensional Arrays of Core-Shell Fe-Pd Multicomponent Nanoparticles. In: JOURNAL OF PHYSICAL CHEMISTRY C, 122 (46). pp. 26528-26542.

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Abstract

We have employed micelle nanolithography technique to achieve two-dimensional (2D) arrays of Fe-Pd multicomponent core-shell nanoparticles (NPs) in a quasi-hexagonal lattice. X-ray photoelectron spectroscopy and synchrotron-based X-ray absorption spectroscopy together confirm that high temperature annealing (similar to 900 K) renders core-shell architecture in which metallic Pd phase adopts the core and Fe-Pd mixed oxide phase adopts the shell. The mixed Fe-Pd oxide shell closely resembles a Pd-doped alpha-Fe2O3 structure. Finally, temperature-programmed desorption measurement explores the surface chemistry of carbon dioxide (CO2) on the Fe-Pd multicomponent nanoparticle surfaces. This surface chemistry has been explored on atomically clean Fe-Pd multicomponent NP surfaces under the ultrahigh vacuum conditions. Cleanliness of the NP surfaces is confirmed with the help of auger electron spectroscopy. We find that Fe-Pd multicomponent core shell nanoparticles capture CO2 at the room temperature; however, on the contrary, corresponding single component analogue nanoparticles fabricated following the same procedure do not capture CO2 at the room temperature. To the best of our knowledge, this is the first report on the morphology, stability, structure, and CO2 surface chemistry of well-characterized supported Fe-Pd multicomponent core-shell nanoparticles.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICAL CHEMISTRY C
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copyright of this article belongs to AMER CHEMICAL SOC
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	01 Jan 2019 17:40
Last Modified:	01 Jan 2019 17:40
URI:	http://eprints.iisc.ac.in/id/eprint/61297

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