Oxidation of Ethanol and Its Derivatives on Well Defined Pt Single Crystal Electrodes Vicinal to Pt(111): A Comparative Study

The oxidation of ethanol (EtOH) at Pt(111) electrodes is dominated by the 4e path leading to acetic acid. The inclusion of surface defects such as those present on stepped surfaces leads to an increase of the reactivity towards the most desirable 12e path leading to CO2 as final product. This path is also favored when the methyl group is more oxidized, as in the case of ethylene glycol (EG) that spontaneously decomposes to CO on Pt(111) electrodes, thus showing a more effective breaking of the C-C bond. Some trends in reactivity can be envisaged when other derivative molecules are compared at well-ordered electrodes. This strategy was used in the past, but the improvement in the electrode pretreatment and the overall information available on the subject suggest that relevant information is still missing.

National defense migration : hearings before the Select Committee Investigating National Defense Migration, House of Representatives, Seventy-seventh Congress, first[-second] session, pursuant to H. Res. 113, a resolution to inquire further into the interstate migration of citizens, emphasizing the present and potential consequences of the migration caused by the National Defense Program. pt. 11-[34].

Continues the numbering and the pagination of Interstate migration, hearing before the Select Committee to Investigate the Interstate Migraion of Destitute Citizens, which Committee was the predecessor of the Select Committee Investigating National Defense Migration.

Robinson Cruses resor och äfwentyr, samt hans wistande i 28 ȧr pȧ en obebodd ö.

Contains pt. 1 only.

Transactions of the sixth International congress on tuberculosis. Washington, September 28 to October 5, 1908.

v. 1, pt. 1. Proceedings of Section I: Pathology and bacteriology. Proceedings of joint session of Sections I and II: Opsonic index. Conjunctival and cutaneous tuberculin reactions. Serum diagnosis.--v. 1, pt. 2 Proceedings of Section II: Clinical study and therapy of tuberculosis, sanatoria, hospitals, and dispensaries.--v. 2. Proceedings of Section III: Surgery and orthopedics. Proceedings of Section IV: Tuberculosis in infancy.--v. 3. Proceedings of Section V: Hygienic, social, industrial, and economic aspects of tuberculosis.--v. 4, pt. 1. Proceedings of Section VI: State and municipal control of tuberculosis.--v. 4, pt. 2. Proceedings of Section VII: Tuberculosis in animals and its relations to man.--v. 5. The opening and closing ceremonies. Report of the Secretary-General. Officers, committees, and members.--[v. 6] A series of public lectures Specially prepared for the sixth International congress on tuberculosis, by A. Calmette...Louis Landouzy...[and others] Ed. by the secretary-general, and printed as a supplement to the Transactions of the Congress.

Goethe in Berlin. Erinnerungsblätter zur feier seines hundertjähringen goburtsfestes am 28.august 1849.

Ed. By J.V. Teichmann. cf. Goedeke, Karl. Grundrisz zur geschichte der deutschen dichtung, 3d ed., v. 4, pt. 2, p. 254.

Catalogue of shield reptiles in the collection of the British museum. Pt. I. Testudinata (tortoises)

Accompanied by "Supplement to the Catalogue of shield reptiles in the collection of the British museum. Pt. I. Testudinata (tortoises). With figures of the skulls of 36 genera. By John Edward Gray." (ix, [1], 120 p. illus. 31 x 25 cm.) Published: London, Printed by order of the Trustees, 1870.

Direct support and general support maintenance manual : switchboards, SB-22/PT (NSN 5805-00-257-3602) and SB-22A/PT (NSN 5805-00-715-6171) (including tone signaling adapter TA-977/PT (NSN 5805-01-040-9653)).

Includes index.

Drugs and violence : the criminal justice system in crisis : hearings before the Permanent Subcommittee on Investigations of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, first session, June 26, 1989 (Macon, GA) and June 28, 1989 (Atlanta, GA).

"Second session, May 21, 1990 (Portland, ME)"--Pt. 3.

Administration's fiscal year 1984 budget proposals--II : hearings before the Committee on Finance, United States Senate, Ninety-eighth Congress, first session, June 15, 16, 22, 23, 28 and 29, 1983.

Item 1038-A, 1038-B (microfiche)

Hydrodebromination of bromobenzene over Pt(111)

The surface chemistry of benzene and bromobenzene over Pt(111) has been studied by temperature-programmed XPS/MS and NEXAFS. Time-resolved XPS shows that benzene adopts a single chemically distinguishable environment during low-temperature adsorption within the monolayer, with a saturation coverage at θC6H6 = 0.2 ML. Around 20% of a benzene monolayer desorbs molecularly, while the remainder dehydrogenates to surface carbon. Bromobenzene likewise adsorbs molecularly at 90 K, giving rise to two C 1s environments at 284.4 and 285.3 eV corresponding to the C−H and C−Br functions, respectively. The saturation C6H5Br monolayer coverage is 0.11 ML. NEXAFS reveals that bromobenzene adopts a tilted geometry, with the ring plane at 60 ± 5° to the surface. Bromobenzene multilayers desorb at ∼180 K, with higher temperatures promoting competitive molecular desorption versus C−Br scission within the monolayer. Approximately 30% of a saturated bromobenzene monolayer either desorbs reversibly or as reactively formed hydrocarbons. Debromination yields a stable (phenyl) surface intermediate and atomic bromine at 300 K. Further heating results in desorption of reactively formed H2, C6H6, and HBr; however, there was no evidence for either biphenyl or Br2 formation. Pt(111) is an efficient surface for low-temperature bromobenzene hydrodebromination to benzene and HBr. © 2007 American Chemical Society.