Disperse Electrolytic Platinum and Palladium Deposits of Submicron Thickness on Polycrystalline Supports: An X-ray Diffractometry and Microscopy Study Full article
| Journal |
Russian Journal of Electrochemistry
ISSN: 1023-1935 , E-ISSN: 1608-3342 |
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| Output data | Year: 2002, Volume: 38, Number: 10, Pages: 1116-1131 Pages count : 16 DOI: 10.1023/A:1020607904477 | ||||
| Tags | Palladium; Deposition Potential; Chloride Salt; Coherent Scattering; Disperse Metal | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 01-03-33132 |
Abstract:
The structure of model electrode materials broadly used in electrocatalysis (platinized platinum, palladized platinum, platinized gold) is studied by x-ray diffractometry, scanning electron microscopy, and transmission electron microscopy. Disperse platinum and palladium coatings less than 1 μm thick are obtained by potentiostatic or galvanostatic deposition from solutions of complex chloride salts. Lattice parameters of disperse metals are shown to be considerably smaller than those of bulky crystals. Some new tendencies of variations in structural parameters with the deposition potential are revealed. Special attention is paid to a reliable determination of the size of regions of coherent scattering (ROCS) and microdistortion; in connection with this, results of approximation of reflections by various functions and a harmonic analysis of reflections are compared. The latter are used for constructing ROCS distributions by size. Good agreement is found with the STM data for platinum deposits obtained earlier. Conversely, in the case of palladium deposits, ROCS are smaller than the particle size in an outer layer of the deposit by the STM data. This result is interpreted in terms of strong concrescence of palladium nanoparticles. To determine the true surface areas of deposits and estimate continuousness of covering the support by the deposit and regularities of platinum aging on gold in conditions of potential cycling, a voltammetry method is applied.
Cite:
Plyasova L.M.
, Molina I.Y.
, Cherepanova S.V.
, Rudina N.A.
, Sherstyuk O.V.
, Savinova E.R.
, Pronkin S.N.
, Tsirlina G.A.
Disperse Electrolytic Platinum and Palladium Deposits of Submicron Thickness on Polycrystalline Supports: An X-ray Diffractometry and Microscopy Study
Russian Journal of Electrochemistry. 2002. V.38. N10. P.1116-1131. DOI: 10.1023/A:1020607904477 WOS Scopus РИНЦ ANCAN OpenAlex
Disperse Electrolytic Platinum and Palladium Deposits of Submicron Thickness on Polycrystalline Supports: An X-ray Diffractometry and Microscopy Study
Russian Journal of Electrochemistry. 2002. V.38. N10. P.1116-1131. DOI: 10.1023/A:1020607904477 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Плясова Л.М.
, Молина И.Ю.
, Черепанова С.В.
, Рудина Н.А.
, Шерстюк О.В.
, Савинова Е.Р.
, Пронькин C.Н.
, Цирлина Г.А.
Дисперсные электролитические осадки платины и палладия субмикронных толщин на поликристаллических подложках: Рентгеновская дифрактометрия и микроскопия
Электрохимия. 2002. Т.38. №10. С.1236-1252. РИНЦ
Дисперсные электролитические осадки платины и палладия субмикронных толщин на поликристаллических подложках: Рентгеновская дифрактометрия и микроскопия
Электрохимия. 2002. Т.38. №10. С.1236-1252. РИНЦ
Dates:
| Submitted: | Jan 14, 2002 |
| Published print: | Oct 1, 2002 |
Identifiers:
| Web of science: | WOS:000179135200011 |
| Scopus: | 2-s2.0-1842529807 |
| Elibrary: | 13406137 |
| Chemical Abstracts: | 2002:788103 |
| Chemical Abstracts (print): | 138:194918 |
| OpenAlex: | W310640014 |