Metal deposits on well-ordered oxide films

Bäumer, Marcus; Freund, Hans‐Joachim

doi:10.1016/s0079-6816(99)00012-x

Cited by 959 publications

(848 citation statements)

References 211 publications

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“…40 The synergistic effect between the Mo 2 C nanotubes and Pt was thus studied by X-ray absorption spectra. XANES spectroscopy A highly active, catalyst for methanol electro-oxidation K Zhang et al is a powerful technique widely used in studying the electronic and chemical structure of materials.…”

Section: Electrochemical Performancementioning

confidence: 99%

A highly active, stable and synergistic Pt nanoparticles/Mo2C nanotube catalyst for methanol electro-oxidation

Zhang

Yang

et al. 2015

NPG Asia Mater

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Poor electrocatalytic activity and carbon monoxide (CO) poisoning of the anode in Pt-based catalysts are still two major challenges facing direct methanol fuel cells. Herein, we demonstrate a highly active and stable Pt nanoparticle/Mo 2 C nanotube catalyst for methanol electro-oxidation. Pt nanoparticles were deposited on Mo 2 C nanotubes using a controllable atomic layer deposition (ALD) technique. This catalyst showed much higher catalytic activity for methanol oxidation and superior CO tolerance, when compared with those of the conventional Pt/C and PtRu/C catalysts. The experimental evidence from X-ray absorption near-edge structure spectroscopy and scanning transmission X-ray microscopy clearly support a strong chemical interaction between the Pt nanoparticles and Mo 2 C nanotubes. Our studies show that the existence of Mo 2 C not only minimizes the required Pt usage but also significantly enhances CO tolerance and thus improves their durability. These results provide a promising strategy for the design of highly active next-generation catalysts.

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Section: Electrochemical Performancementioning

confidence: 99%

A highly active, stable and synergistic Pt nanoparticles/Mo2C nanotube catalyst for methanol electro-oxidation

Zhang

Yang

et al. 2015

NPG Asia Mater

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“…Vibrational spectroscopy is a useful tool for characterization of thin oxide films (see examples in [3,6,9,12]). Schroeder et al [18] reported IRA spectra at the different stages of the SiO 2 /Mo(112) film preparation.…”

Section: Vibrational Spectroscopy: Experiments Vs Theorymentioning

confidence: 99%

“…When grown on metal substrates, oxide films are well suited for studying electronic and chemical properties by a variety of surface sensitive techniques. This "surface science" approach has been proven to be very efficient for determining the atomic structure of many oxide surfaces (see [1][2][3][4][5][6][7][8][9][10][11][12] and references therein).…”

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confidence: 99%

On the geometrical and electronic structure of an ultra-thin crystalline silica film grown on Mo(112)

et al. 2007

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Abstract. The atomic structure of a well-ordered silica film grown on a Mo(112) single crystal substrate is discussed in detail using the experimental and theoretical results available to date. New photoelectron spectroscopy results using synchrotron radiation and ultraviolet spectroscopy data are presented. The analysis unambiguously shows that the ultra-thin silica film consists of a two-dimensional network of corner sharing [SiO 4 ] tetrahedra chemisorbed on the unreconstructed Mo(112) surface. The review also highlights the important role of theoretical calculations in the determination of the atomic structure of the silica films and in interpretation of experimental data.

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“…For studies of that kind planar substrates, instead of the technically used porous materials, are needed to take full advantage of modern surface spectroscopic and microscopic techniques (Bäumer and Freund 1999).…”

Section: S6mentioning

confidence: 99%

Models for heterogeneous catalysts: studies at the atomic level

Freund

2016

Rend. Fis. Acc. Lincei

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A systematic approach to model heterogeneous catalyst material and characterization at the atomic level is presented. Two examples are used to illustrate the concepts derived from those studies. They document the problems arising on the way to create such model systems and they also indicate possible solutions. The first example is connected with activation of CO 2 at the rim of electron rich MgO (thin film-supported Au islands), and the second example aims at the creation of a model system for the Phillips catalyst for ethylene polymerization and, in particular, the creation of a hydroxylated silica support.

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Metal deposits on well-ordered oxide films

Cited by 959 publications

References 211 publications

A highly active, stable and synergistic Pt nanoparticles/Mo2C nanotube catalyst for methanol electro-oxidation

A highly active, stable and synergistic Pt nanoparticles/Mo2C nanotube catalyst for methanol electro-oxidation

On the geometrical and electronic structure of an ultra-thin crystalline silica film grown on Mo(112)

Models for heterogeneous catalysts: studies at the atomic level

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