Platinum, single crystal

Kolb D M, Kdtz R and Yamamoto K 1979 Copper monolayer formation on platinum single crystal surfaces Optical and... 

The experimental investigation was performed by depositing copper films on the (100) -surface of a platinum single crystal. It was found that the reconstruction of the Pt surface was lifted upon Cu adsorption. The system was then heated to different temperatures and the formation of different ordered surface alloys was evidenced by... 

Some measurements with Pt single-crystal faces have been published recently.140,210,773 Iwasita and Xia210 prepared platinum single crystals according to the method of Clavilier et a/.186 773 After flame annealing and cooling in an H2 + Ar mixture, the electrode was protected... 

Iron dissolution in phosphoric acid, the current-potential curve, 224 Iwasita and Xia, preparation of platinum single crystals, 133... 

CO adsorption on electrochemically facetted (Clavilier), 135 Hamm etal, 134 surfaces (Hamm etal), 134 Platinum group metals in aqueous solutions, 132 and Frumkin s work on the potential of zero charge thereon, 129 Iwasita and Xia, 133 and non-aqueous solutions, 137 potentials of zero charge, 132, 137 preparation of platinum single crystals (Iwasita and Xia), 133 Platinum-DMSO interfaces, double layer structure, 141 Polarization time, 328 Polarons, 310... 

Surface science studies have generated much insight into how hydrocarbons react on the surfaces of platinum single crystals. We refer to Somorjai [G.A. Somor-jai. Introduction to Surface Chemistry and Catalysis (1994), Wiley, New York] for a detailed overview. Also, the reactions of hydrocarbons on acidic sites of alumina or on zeolites have been studied in great detail [H. van Bekkum, E.M. Flanigan and J.C. Jansen (Eds.), Introduction to Zeolite Science and Practice (1991), Elsevier, Amsterdam],... 

Since oxidation of methanol is an electrocatalytic reaction with different adsorption steps, interactions of the adsorbed species with the metallic surface are important. Using platinum single-crystal electrodes, it has been proven that the electrooxidation of methanol is a surface-sensitive reaction. The initial activity of the Pt(llO) plane is much higher than that of the other low-index planes, but the poisoning phenomenon is so rapid that it causes a fast decrease in the current densities. The... 

It was quickly seen from studies on platinum single crystals that voltammograms for hydrogen adsorption and desorption differ somewhat among the different faces and between the single-crystal faces and polycrystalline platinum. Despite these differences, though, they have common traits as weU. The areas under these curves,... 

Angelucci CA, Nart FC, Heirero E, Feliu JM. 2007a. Anion re-adsorption and displacement at platinum single crystal electrodes in CO-containing solutions. Electrochem Commun 9 1113-1119. 

Clavilier J. 1987. Pulsed linear sweep voltammetry with pulses of constant level in a potential scale, a polarization demanding condition in the study of platinum single crystal electrodes. J Electroanal Chem 236 87-94. 

Clavilier J, Sun SG. 1986. Electrochemical study of the chemisorbed species formed from formic acid dissociation at platinum single crystal electrodes. J Electroanal Chem 199 ... 

Garcia G, Koper MTM. 2008. Stripping voltammetry of carbon monoxide oxidation on stepped platinum single-crystal electrodes in alkaline solution. Phys Chem Chem Phys 10 3802-3811. 

Koper MTM, Schmidt TJ, MarkovicNM, Ross PN Jr. 2001. Potential oscillations and S-shaped polarization curve in the continuous electro-oxidation of CO on platinum single-crystal electrodes. J Phys Chem B 105 8381-8386. 

Lai SCS, Koper MTM. 2009. Electro-oxidation of ethanol and acetaldehyde on platinum single-crystal electrodes. Faraday Discuss 140 399-416. 

Lamy C, Leger JM, Clavilier J. 1982. Structural effects in the electrooxidation of methanol in alkahne medium. Comparison of platinum single crystal and polycrystalline electrodes. J Electroanal Chem 135 321-328. 

Tripkovic AV, Popovic KD, Lovic JD. 2001. The influence of the oxygen-containing species on the electrooxidation of the C-l-C alcohols at some platinum single crystal surfaces in alkaline solution. Electrochim Acta 46 3163-3173. 

Climent V, Gomez R, Orts JM, Aldaz A, Eehu JM. 2000. Potential of zero total charge of platinum single crystal electrodes. In Jerkiewicz G, Eehu JM, Popov BN, eds. The Electrochemistry Society Proceedings (Hydrogen at Surface and Interfaces). Pennington, NJ The Electrochemical Society, pp. 12-30. 

G6mez R, Llorca MJ, Feliu JM, Aldaz A. 1992. The behavior of germanium adatoms irreversibly adsorbed on platinum single crystals. J Electroanal Chem 340 349-355. 

Chrzanowski W, Wieckowski A. 1997. Ultrathin films of ruthenium on low index platinum single crystal surfaces An electrochemical study. Langmuir 13 5974-5978. 

Rodes A, Pastor E, Iwasita T. 1994. An FTIR study on the adsorption of acetate at the basal planes of platinum single-crystal electrodes. J Electroanal Chem 376 109-118. 

Climent V, Garcia-Araez N, Henero E, Feliu JM. 2006. Potential of zero total charge of platinum single crystals A local approach to stepped surfaces vicinal to Pt(lll). Russ J Electrochem 42 1145-1160. 

El Kadiri F, Fame R, Dmand R. 1991. Electrochemical reduction of molecular-oxygen on platinum single-crystals. J Electroanal Chem 301 177-188. 

J. W. Linnett. There were 11 papers with theoretical inputs but with more emphasis given to new developments in experimental methods including structural (LEED and electron microscopy) and surface spectroscopies. LEED provided crucial evidence for the role of surface steps at platinum single crystals in the dissociation of various diatomic molecules, while electron microscopy revealed the role of dislocations as sites of high reactivity of... 

We and others have been involved in the study of such systems including Cu/Au(lll),85 86 Ag/Au(lll),87 Pb/Ag(lll),88 and Cu/Pt(lll).89 The first three systems involved the use of epitaxially deposited metal films on mica as electrodes.90 92 Such deposition gives rise to electrodes with well-defined single-crystalline structures. In the last case a bulk platinum single crystal was employed. Because of the single-crystalline nature of the electrodes, polarization dependence studies could be used to ascertain surface structure. 

The platinum single crystals treated in this May are small spherical platinum beads Hith a diameter ranging from l.S to 1.9 am obtained by melting of a Mire. They are oriented, cut and polished according to the technique described in (10.) Mith an accuracy uithin 3 minutes of the nominal orientation. After polishing, the samples are annealed at 1300°-1500 C to eliminate the perturbed surface layer. 

A voltammetric characterization of platinum single crystal surfaces produced by these three methods shows that a very similar surface order and cleanliness are obtained in each case. The features embodied by the third method which we use for the radio-electrochemistry work, are as follows ... 

Hydrogen Electrosorption and Oxidation of Formic Acid on Platinum Single-Crystal Stepped Surfaces... 

I would also like to thank Dr. D. A. Dyk and Dr. S. L. Gupta for their skillful assistance for my experiments and us id discussions. Specific thanks go to Dr. I. Bae for his instruction for the in situ infrared spectroscopic measurement. I am thankful for Dr. S. Wasmus for the assistance in the use of the on-line mass spectrometer. I thank Dr. K. Sashikata for the instruction for the platinum single crystal studies. 

Tlie low index svirfaces of platinum single crystals were examined with cyclic voltammetry. As mentioned in Chapter 2, single crystal surfaces are reconstructed by Pt-OH formation and reduction at a higher potential. Therefore, it was impossible to clean the surface thoroughly by potential steps without disturbing the surface structure. 

Furuya, N., and Koide, S. (1989). Hydrogen adsorption on platinum single-crystal surfaces. Surf. Sci. 220, 18-28. 

A detailed comparison of the voltammet-ric behavior of platinum single-crystal and faceted electrodes was also given [218]. 

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