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Materials 2018, 11(5), 798; https://doi.org/10.3390/ma11050798

Comparative Physicochemical and Electrochemical Characterization of the Structure and Composition of Thin Pd Binary and Ternary Codeposits with Pt, Ru, and Rh

1
Faculty of Chemistry, Warsaw University, Pasteura 1, 02-093 Warsaw, Poland
2
Industrial Chemistry Research Institute, Rydygiera 8, 01-793 Warsaw, Poland
3
Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warszawa, Poland
*
Authors to whom correspondence should be addressed.
Received: 12 April 2018 / Revised: 10 May 2018 / Accepted: 11 May 2018 / Published: 15 May 2018
(This article belongs to the Section Energy Materials)
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Abstract

Pd-Ru, Pd-Rh, Pd-Pt-Ru, and Pd-Rh-Ru electrodes were prepared as thin layers by potentiostatic codeposition or chemical co-precipitation of metals from baths containing mixtures of chloride salts. The formation of substitutional solid solutions, with lattice parameters smaller than that of pure Pd, was confirmed by X-ray diffraction (XRD). The compositions at various levels of sample volume and thickness were analyzed by inductively coupled plasma atomic emission spectroscopy (ICP-AES), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), and also electrochemically by cyclic voltammetry (CV) in 0.5 M H2SO4. The differences between surface, subsurface, and bulk compositions were compared for various systems in a wide composition spectrum. View Full-Text
Keywords: hydrogen absorbing materials; metals and alloys; composition fluctuations; crystal structure; X-ray diffraction; photoelectron spectroscopies hydrogen absorbing materials; metals and alloys; composition fluctuations; crystal structure; X-ray diffraction; photoelectron spectroscopies
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Hubkowska, K.; Łukaszewski, M.; Soszko, M.; Koss, U.; Hamankiewicz, B.; Czerwiński, A. Comparative Physicochemical and Electrochemical Characterization of the Structure and Composition of Thin Pd Binary and Ternary Codeposits with Pt, Ru, and Rh. Materials 2018, 11, 798.

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