TITLE

Methanol oxidation at Pt/MoOx/MoSe2 thin film electrodes prepared with exfoliated MoSe2

AUTHOR(S)
Bolivar, H.; Izquierdo, S.; Tremont, R.; Cabrera, C.R.
PUB. DATE
December 2003
SOURCE
Journal of Applied Electrochemistry;Dec2003, Vol. 33 Issue 12, p1191
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper presents results on the dispersion of Pt on MoOx/MoSe2 electrodes, which were prepared by an intercalation–exfoliation technique. The Pt/MoOx/MoSe2 electrodes were tested for methanol oxidation by cyclic voltammetry. Thin films of MoSe2 can be oxidized electrochemically to form a MoOx layer. Compared with pure platinum, Pt/MoOx/MoSe2 electrodes gave lower oxidation potentials and higher current densities. We believe that methanol adsorption and subsequent dehydrogenation occur at the Pt atoms, while the OHads nucleation occurs at Mo sites. The presence of the adsorbed —OH groups on Mo sites may catalyze CO oxidation to CO2. This surface reaction is necessary for the improved electrocatalytic behavior of Pt/MoOx/MoSe2 electrodes.
ACCESSION #
16781847

 

Related Articles

  • The Deactivation Modes of Cu/ZnO/Al2O3 and HZSM-5 Physical Mixture in the One-Step DME Synthesis. Barbosa, Flávia; Ruiz, Vanusa; Monteiro, José; Avillez, Roberto; Borges, Luiz; Appel, Lucia // Catalysis Letters;Nov2008, Vol. 126 Issue 1/2, p173 

    The CO2 production by shift reaction and the deactivation process are the drawbacks of the One-Step DME Synthesis. Therefore, this contribution discusses possible deactivation modes taking into account the catalytic performance and the characterization of spent catalysts using XRD, TG and FTIR...

  • Formation of low-valence palladium species in the course of oxidation of alcohols with palladium(II) tetraaqua complex. Potekhin, V. // Russian Journal of General Chemistry;Sep2006, Vol. 76 Issue 9, p1417 

    The formation of low-valence palladium species Pd ( n ≥ 2) in the course of oxidation of aliphatic C1-C4 alcohols with oxygen in the presence of palladium(II) tetraaqua complex in aqueous solution was proved UV-spectrophotometrically by the absorption band with a maximum at 312 or 316 nm...

  • Etherification of Diarylmethanols and 1-Phenylalkan-1-ols Over Platinum on Carbon. Thiemann, Thies // Letters in Organic Chemistry;Oct2009, Vol. 6 Issue 7, p515 

    In the presence of platinum on carbon (Pt/C), diarylmethanols and donor substituted 1-phenylalkan-1-ols undergo cross-etherification with primary and secondary alcohols.

  • Kinetic modeling of homogeneous methanol synthesis catalyzed by base-promoted nickel complexes. Mahajan, Devinder; Krisdhasima, Viwat; Sproull, Robert D // Canadian Journal of Chemistry;May2001, Vol. 79 Issue 5/6, p848 

    Nickel complexes promoted by alkoxide bases can affect facile conversion of synthesis gas into methanol under thermodynamically favorable temperatures. At 100°C, syngas conversion of 99% with turnover frequency of 66 h[sup -1] is reported. The reaction is truly catalytic in Ni as well as in...

  • On the nature of radicals formed in methanol catalytic oxidation. Malakhova, I. V.; Shubin, A. A. // Kinetics & Catalysis;Jul2009, Vol. 50 Issue 4, p583 

    The quantum-chemical calculations of the hydroxymethyl radical •CH2OH were performed for the first time and a theoretical EPR spectrum of this radical was constructed. The formation of the hydroxymethyl radical in the reaction of methanol oxidation is thermodynamically favorable. The shape...

  • A theoretical and experimental investigation of some unusual intermolecular hydrogen-bond IR bands – Appearances can be deceptive. Litwinienko, Grzegorz; DiLabio, Gino A.; Ingold, K.U. // Canadian Journal of Chemistry;Oct2006, Vol. 84 Issue 10, p1371 

    The IR spectra of the O-H stretch for hydrogen bonds (HBs) arising from complex formation between the HB donor (HBD), 4-fluorophenol, and the HB acceptors, peroxides and ethers, frequently show asymmetry that appears to arise from two incompletely resolved bands from two different complexes, but...

  • Performance of ternary PtRuRh/C electrocatalyst with varying Pt:Ru:Rh ratio for methanol electro-oxidation. Kawaguchi, Tomoyuki; Rachi, Yasuhiro; Sugimoto, Wataru; Murakami, Yasushi; Takasu, Yoshio // Journal of Applied Electrochemistry;Oct2006, Vol. 36 Issue 10, p1117 

    Highly dispersed ternary PtRuRh/C anode catalysts for direct methanol fuel cells were prepared with various contents and their electro-catalytic activities towards methanol oxidation at 25 °C and 60 °C were examined to investigate the influence of the catalyst composition. Electrocatalysts...

  • New Synthetic Routes to More Active Cu/ZnO Catalysts Used for Methanol Synthesis. Kurtz, Melanie; Bauer, Natalia; Büscher, Christoph; Wilmer, Hagen; Hinrichsen, Olaf; Becker, Ralf; Rabe, Stefan; Merz, Klaus; Driess, Matthias; Fischer, Roland A.; Muhler, Martin // Catalysis Letters;Jan2004, Vol. 92 Issue 1/2, p49 

    New preparation routes are applied to synthesize novel Cu/ZnO catalysts exhibiting high catalytic activity in methanol synthesis. In particular, the deposition–precipitation of copper onto high specific surface area (SSA) zinc oxide particles and the chemical vapor deposition of diethyl...

  • Mechanistic study of oxidation of alcohols by N-bromoisonicotinamide in aqueous acetic acid medium. Balasubramaniyan, M.; Priya, V.; athiyalagan, N. // International Journal of ChemTech Research;Jul2011, Vol. 3 Issue 3, p1096 

    Kinetics of oxidation of alcohols viz. methanol, ethanol, propanol, butanol, isobutanol, pentanol, isopentanol and hexanol, have been investigated at 328 K, by a newly developed oxidant N-bromoisonicotinamide (NBIN) in aqueous acetic acid medium. The reaction is first order in [NBIN], zero order...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics