Download or read book Adsorption and Activation of Carbon Monoxide at Palladium Surfaces a Dissertation by Paul Vincent Mac Kinney written by Paul Vincent Mac Kinney and published by . This book was released on 1931 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adsorption and Activation of Carbon Monoxide at Palladium Surfaces a Dissertation written by Paul Vincent Mckinney and published by . This book was released on 1931 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adsorption and Activation of Carbn Monoxide at Palladium Surfaces written by Paul Vincent McKinney and published by . This book was released on 1931 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Relation Between the Conditions of Decomposition of Aluminum Hydroxide and the Capacity of the Surface for Adsorption of Carbon Monoxide and Carbon Dioxide written by Lloyd Leo Withrow and published by . This book was released on 1925 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Additives on the Reactivity of Palladium Surfaces for the Chemisorption and Hydrogenation of Carbon Monoxide written by Thomas George Rucker and published by . This book was released on 1987 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oxidation of Carbon Monoxide on Palladium Model Catalysts written by Frederick H. Rumpf and published by . This book was released on 1987 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adsorption of Molecular Hydrogen and Carbon Monoxide on a Stepped Palladium Surface written by Krister Svensson and published by . This book was released on 1994 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Poisoning of Palladium Catalyst by Carbon Monoxide and Its Degree of Adsorption on Glass and Other Surfaces written by M. G. T. Burrows and published by . This book was released on 1941 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coadsorption of Hydrogen and Carbon Monoxide on Nickel and Palladium Surfaces written by Lars Westerlund and published by . This book was released on 1991 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bridging the Materials and Pressure Gaps written by Henry D. Lewis and published by . This book was released on 2003 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In Situ Mechanistic Studies of the Oxidation of Carbon Monoxide Ethylene and Acetylene Over Platinum Surfaces written by Daniel James Burnett and published by . This book was released on 2001 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Additives on the Reactivity of Palladium Surfaces for the Chemisorption and Hydrogenation of Carbon Monoxide written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research studied the role of surface additives on the catalytic activity and chemisorptive properties of Pd single crystals and foils. Effects of Na, K, Si, P, S, and Cl on the bonding of CO and H and on the cyclotrimerization of acetylene on the (111), (100) and (110) faces of Pd were investigated in addition to role of TiO2 and SiO2 overlayers deposited on Pd foils in the CO hydrogenation reaction. On Pd, only in the presence of oxide overlayers, are methane or methanol formed from CO and H2. The maximum rate of methane formation is attained on Pd foil where 30% of the surface is covered with titania. Methanol formation can be achieved only if the TiO(subscript x)/Pd surface is pretreated in 50 psi of oxygen at 550°C prior to the reaction. The additives (Na, K, Si, P, S, Cl) affect the bonding of CO and hydrogen and the cyclotrimerization of acetylene to benzene by structural and electronic interactions. In general, the electron donating additives increase the desorption temperature of CO and increase the rate of acetylene cyclotrimerization and the electron withdrawing additives decrease the desorption temperature of CO and decrease the rate of benzene formation from acetylene.

Download or read book The Investigation of the Adsorption and Reaction Characteristics of Palladium Oxide Surfaces written by Can Hakanoglu and published by . This book was released on 2013 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methane, ethane, propane, n-butane and n-pentane (alkanes studied) are also adsorbed on to the cus-Pd site creating alkane sigma complexes. This alkane sigma complex results in a more strongly bound adsorbed species and it is the precursor for the reaction of the alkanes longer than ethane. Although methane and ethane both form the sigma complex, the kinetics favor desorption over reaction. Since the alkanes that react have both primary and secondary C-H bonds, selectivity analysis towards these bonds during the reaction on PdO(101) surface has also been investigated. The selectivity of C-H bond cleavage favors the primary bond in the case of propane activation on PdO(101) surface. n-Butane activation does not have preference to primary or secondary C-H bonds at high coverages, however at the limit of zero coverage, the reaction occur through the primary bond cleavage.

Download or read book CO Oxidation on Palladium 1 Combined Kinetic Infrared Reflection Absorption Spectroscopic Study of Pd 100 written by and published by . This book was released on 1994 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oxidation of carbon monoxide on a Pd(100) single-crystal catalyst was studied using an elevated-pressure IR cell/ultrahigh vacuum surface analysis system. The kinetics of the reaction was followed by monitoring the total pressure change during the course of the reaction. Simultaneously, the surface concentration of adsorbed CO was measured using IR reflection absorption spectroscopy. An activation energy of 29.4 + or - 0.3 kcal/mol was found between 500 and 575 K at a total pressure of 1.50 Torr and CO/O2 = 2. The IR data obtained under reaction conditions show the CO coverage to vary between 0.45 and 0.55 monolayers (ML). For this coverage regime, the CO heat of adsorption was determined to be 29 + or - kcal/mol, corresponding closely to the apparent activation energy. Between 0.5 and 10.0 Torr, negative first-order CO and positive first-order oxygen pressure dependencies were measured, yielding a zero-order total pressure dependence of the reaction rate. No change in CO coverage was observed with a change in the oxygen pressure, while the CO coverage increased from 0.50 ML at P sub co = 0.50 Torr to 0.55 ML at P sub co = 8.0 Torr.

Download or read book The Adsorption and Reaction of Carbon Monoxide and Oxygen on Metal Surfaces written by Michael Rennie McClellan and published by . This book was released on 1981 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemisorption of Carbon Monoxide on Three Metal Surfaces Ni 111 Pd 111 and Pt 111 A Comparative Study written by and published by . This book was released on 1990 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: At one-third coverage of carbon monoxide, a (3 x 3)R30 deg low energy electron diffraction (LEED) pattern has been observed on Ni(111), Pd(111) and Pt(111). Interestingly, the C-O stretching frequency indicates three completely different adsorption sites; a 2-fold bridge site for Ni(111), a 3-fold site for Pd(111), and an on-top site for Pt(111). As the coverage increases to one-half, a c(4x2) Leed pattern appears. For Ni(111) and pd (111), the adsorbate seems to prefer the 2-fold site. On Pt(111), half of the chemisorbed CO sits on the on- top site while the other half is located at the 2-fold site. Further increase in coverage results in titled CO molecules on Pt(111) and adsorption of CO at the on-top site of Ni(111) and Pd(111). To rationalize these observations, we carried out extended Huckel calculations within the tight-binding formalism. Our discussion is augmented by conceptual tools such as density of states and crystal orbital overlap population. We also examine the question of the adequacy of the Blyholder model in describing the adsorbate-surface interaction. (js).

Download or read book Carbon Monoxide Adsorption on Pt Monolayer on Pd hkl Surface Studied by Subtractively Normalized Interfacial Fourier Transform Infra red Spetroscopy written by Milan Slavkovic and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress of our civilization is critically dependent on the discovery of new materials and structures with better properties, novel functionality and applications. The ultra thin metal overlayers represent one class of such structures with increasing application in fuel cells. In our work, the two-dimensional Pt monolayers on Pd(hkl) were used as model system to study CO adsorption. The PtML/Pd(hkl) were obtained using surface limited red-ox replacement reaction of underpotentially deposited Cu monolayers on Pd(hkl) with, and without presence of citrate in the reaction solution. The strength of the CO adsorption on Pt monolayer was studied by subtractevily normalized interfacial fourier transform infra-red spectroscopy (SNIFTIRS). The SNIFTIRS results indicate synergistic effect of both; Pt monolayer and Pd(hkl), yielding a qualitatively new phenomenon where the bond of adsorbed CO on PtML/Pd(hkl) is weaker than the corresponding CO bond on each of the bulk metal surfaces. This result has fundamental importance when catalysts for oxygen reduction and hydrogen oxidation reactions are considered where the surface poisoning by intermediates or impurities is responsible for reduced catalyst activity.