Adsorption and Catalysis on Oxides of Transition Metals

Kiselev, V. F.; Крылов, О. В.

doi:10.1007/978-3-642-73887-6_4

Cited by 25 publications

(39 citation statements)

References 104 publications

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“…) were in good agreement with the bicarbonate (CO 2 (OH)), on oxides (1615-1630 (υ as ) 1400-1500 (υ s ), 1225 (γOH) cm -1 ), 23 and on Au/Fe 2 O 3 (1621, 1414, and 1222 cm -1 ). 24 Therefore, the spectra indicate the decrease of CO(a) and bicarbonates on the catalyst when CO(g) was removed from the stream of (CO + O 2 ).…”

Section: Resultssupporting

confidence: 75%

Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H₂—Oxidation of CO with OH via HCOO Intermediate

Tanaka

Shou

et al. 2009

J. Phys. Chem. C

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/ 2 O 2 f CO 2 ) on a FeO x /Pt/TiO 2 catalyst (∼140 wt % FeO x on 1 wt % Pt/TiO 2 ) was studied at 60°C by using in situ DRIFT spectroscopy. The PROX reaction of CO occurs via a HCOO intermediate and its oxidation with OH instead of oxygen, which is different from ordinary oxidation of CO with O 2 (CO + 1 / 2 O 2 f CO 2 ). The mechanism is as follows: (i) CO(a) + OH -f HCOO + e, (ii) O + e + H + f OH, and (iii) HCOO + OH f CO 2 + H 2 O, and step (iii) is the rate-determining step. Providing HCOO intermediates by a reaction of CO(a) with the OH -anion, step (i), was deduced by combining an electroconductive PROX catalyst (Pt/CNT(carbon nanotube)) with a hydrogen fuel cell. The oxidation of CO enhanced by H 2 and H 2 O and the hydrogen isotope effect by H 2 /D 2 and H 2 O/ D 2 O on the FeO x /Pt/TiO 2 catalyst are well explained by this mechanism.

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Section: Resultssupporting

confidence: 75%

Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H₂—Oxidation of CO with OH via HCOO Intermediate

Tanaka

Shou

et al. 2009

J. Phys. Chem. C

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“…5,42 Therefore many ideas and results obtained from catalysis research can be used to explain hydrogen absorption. In particular, the switching kinetics of a switchable mirror may be seen primarily as a measure for the catalytic activity of its surface.…”

Section: Discussionmentioning

confidence: 99%

Self-Organized Layered Hydrogenation in BlackMg2NiHxSwitchable Mirrors

et al. 2004

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The morphology and electronic structure of Pd clusters grown on oxidized yttrium surfaces are investigated by scanning tunneling microscopy and ultraviolet photoelectron spectroscopy. The hydrogen sorption mediated by the Pd clusters is determined from the optically monitored switching kinetics of the underlying yttrium film. A strong thickness dependence of the hydrogen uptake is found. The electronic structure of the as-grown Pd clusters depends only weakly on their size. Strong changes of the photoemission spectra are found after hydrogenation, in particular the oxide peak shifts and the Pd peaks vanish. Both phenomena are due to a strong metal-support interaction (SMSI) state, characterized by a complete encapsulation of the clusters by a reduced yttrium oxide layer. Scanning tunneling spectroscopy confirms the SMSI state of small Pd clusters after hydrogen exposure. The SMSI effect is less important with increasing Pd thickness. This explains the critical thickness for the catalyzed hydrogen uptake by the Pd/ YO x / Y system. The results shed light on the mechanism of hydrogen absorption at the triple point gas-catalyst-oxide, which also plays an important role in today's fuel cell technology.

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“…The doping with copper is widely used in catalysis [7][8][9]. It was established also that dissociative adsorption of hydrogen on Pt atoms takes place at the surface of Cu 3 Pt alloy [10].…”

Section: Application Of Cu (1-x) Pd X Surface Alloy As a Protective Amentioning

confidence: 99%

ANALYSIS OF AGEING MECHANISMS OF GAS MIS SENSORS WITH Pd (CuXPd) GATE

Litovchenko¹,

Ефремов²

2014

SEMST

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Аннотація АНАЛІЗ МЕХАНІЗМІВ СТАРІННЯ МІН СЕНСОРІВЗ Pd (Cu x Pd) ЗАТВОРОМ В. Г. Литовченко, О. О. Єфремова В загальному виді викладена макроскопічна теорія газового сенсора з каталітичним затвором, яка застосована для пояснення процесів старіння та механізмів стабілізації параметрів сенсора. Дана класифікація мікро механізмів домінуючих процесів старіння. Результати розрахунків та комп'ютерного моделювання співставлені з експерименталь-ними даними, що дозволяє ідентифікувати природу старіння в конкретних випадках і дозволяє рекомендувати методи стримування чи гальмування процесів старіння МДН газових датчиків. Одним з найбільш ефективних методів є легування поверхні Pd елект-роду атомами міді Cu, що супроводжується створенням певних структурних конфігу-рацій Cu-Pd. Зокрема, найбільш ефективною виявилась конфігурація з роздільним фраг-ментарним "острівцевим" легуванням (на противагу рівномірно-стохастичного розподі-лу атомів Cu по поверхні каталітичного електроду).

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Adsorption and Catalysis on Oxides of Transition Metals

Cited by 25 publications

References 104 publications

Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H₂—Oxidation of CO with OH via HCOO Intermediate

Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H₂—Oxidation of CO with OH via HCOO Intermediate

Self-Organized Layered Hydrogenation in BlackMg2NiHxSwitchable Mirrors

ANALYSIS OF AGEING MECHANISMS OF GAS MIS SENSORS WITH Pd (CuXPd) GATE

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Adsorption and Catalysis on Oxides of Transition Metals

Cited by 25 publications

References 104 publications

Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H2—Oxidation of CO with OH via HCOO Intermediate

Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H2—Oxidation of CO with OH via HCOO Intermediate

Self-Organized Layered Hydrogenation in BlackMg2NiHxSwitchable Mirrors

ANALYSIS OF AGEING MECHANISMS OF GAS MIS SENSORS WITH Pd (CuXPd) GATE

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Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H₂—Oxidation of CO with OH via HCOO Intermediate

Dynamic Characterization of the Intermediates for Low-Temperature PROX Reaction of CO in H₂—Oxidation of CO with OH via HCOO Intermediate