Thermally decomposed (110) surface of RuO2 single crystal

Chung, Wen‐Hung; Tsai, Dah–Shyang; Chen, Yi-Ming; Huang, Ying‐Sheng; Chou, Chen–Chia; Liu, Chin-Hsin J.

doi:10.1016/j.ssc.2008.04.007

Cited by 3 publications

(4 citation statements)

References 30 publications

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“…Rather the RuO 2 surface reduces in a way that metallic Ru islands are formed on intact RuO 2 patches . The thermal decomposition of RuO 2 (110) single crystal at elevated temperatures was investigated by using SEM, XRD, XPS, and Raman spectroscopy . The anisotropic decomposition of RuO 2 (110) by vacuum annealing causes longitudinal surface fissures and stripes of Ru nuclei.…”

Section: Complex Surface-redox-chemistry Of Rutheniummentioning

confidence: 86%

See 1 more Smart Citation

Surface Chemistry of Ruthenium Dioxide in Heterogeneous Catalysis and Electrocatalysis: From Fundamental to Applied Research

Over¹

2012

Chem. Rev.

630

643

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CONTENTS 1. Introduction 3357 2. Physicochemical Properties of Ruthenium Oxides 3358 3. Synthesis of RuO 2 3360 3.1. RuO 2 Single Crystals 3360 3.2. Polycrystalline RuO 2 3361 3.3. RuO 2 Thin Film Preparation 3361 3.4. Supported RuO 2 Nanoparticles 3362 3.5. Nanoscale RuO 2 in Diverse Forms 3362 3.6. Hydrous RuO 2 •xH 2 O 3363 3.7. RuO 2 -Based Electrode Coatings 3364 4. Complex Surface-Redox-Chemistry of Ruthenium 3364 4.1. Gas Phase Oxidation of Single Crystalline Ruthenium Surfaces 3364 4.1.1. Ru(0001) 3364 4.1.2. Ru(101̅ 0) 3368 4.2. Electro-oxidation of Ru(0001) 3369 4.3. Reduction of RuO 2 (110) 3369 4.3.1. Reduction by Hydrogen 3370 4.3.2. Reduction by CO 3370 4.3.3. Reduction by Methanol 3370 4.4. Reduction and Oxidation Behavior of Structurally More Complex Ru-Based Materials 3370 4.4.1. Polycrystalline Powder and Supported Nanoparticles of Ru and RuO 2 3370 4.4.2. Polycrystalline Ru Films 3370 4.5. Redox Surface Chemistry of other Platinum Group Metal Single Crystals 3371 4.5.1. Rhodium 3371 4.5.2. Palladium 3372 4.5.3. Platinum 3373 4.5.4. Iridium 3373 5. Atomic Scale Chemistry and Properties of Single-Crystalline RuO 2 Surfaces 3373 5.1. RuO 2 (110) Surface 3374 5.1.1. General (Atomic Scale) Properties of the Stoichiometric RuO 2 (110) Surfaces 3374 5.1.2. Chemical Properties of the RuO 2 (110) Surface: General Adsorption and Reaction Behavior 3376 5.1.3. Interaction of Oxygen with the RuO 2 (110) Surface 3378 5.1.4. Interaction of CO with the RuO 2 (110) Surface 3378 5.1.5. Interaction of H 2 with the RuO 2 (110) Surface 3379 5.1.6. Interaction of Water with RuO 2 (110) Surface 3379 5.1.7. Chemical Reduction of the RuO 2 (110) Surface 3380 5.2. RuO 2 (100) Surface 3380 5.2.1. General Properties of RuO 2 (100) 5.2.2. Adsorption Properties of RuO 2 (100) 5.3. Comparison with Rutile TiO 2 Single Crystals 6. Case Study: CO Oxidation over RuO 2 6.1. Scientific Background 6.2. CO Oxidation over RuO 2 (110): Reaction Mechanism 6.2.1. Experimental Evidence 6.2.2. Theoretical Modeling 6.3. CO Oxidation over RuO 2 Powder and Supported RuO 2 Catalysts: Bridging the Materials Gap 6.4. Deactivation and Poisoning of RuO 2 -Based Catalysts 6.4.1. Structural Deactivation 6.4.2. Poisoning of the Catalyst 6.5. Comparison with the Electrochemical Oxidation of CO at RuO 2 (100) Model Electrodes 6.6. CO Oxidation over RuO 2 : Concluding Remarks and Open Questions 7. Application of RuO 2 in Heterogeneous Catalysis 7.1. Low Temperature CO Oxidation 7.2. Water Production 7.3. Methanol Oxidation 7.4. Ammonia Oxidation and Related Reactions 7.5. HCl Oxidation: Deacon Process 8. Application of RuO 2 in Electrocatalysis 8.1. General Electrochemical Properties of RuO 2 8.2. Hydrogen Evolution Reaction (HER) 8.3. Chlor-Alkali Electrolysis: Dimensionally Stable Anode (DSA) 8.4. Oxygen Evolution Reaction (OER): Electrolysis of Water 8.5. Oxygen Reduction Reaction (ORR) 9. Energy-Related Applications of RuO 2 9.1. Super Capacitors 9.2. Fuel Cells 9.3. Rechargeable Li-Ion Batteries 9.4. Photocatalysis 10. Applications of RuO 2 in Ele...

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Section: Complex Surface-redox-chemistry Of Rutheniummentioning

confidence: 86%

“…DFT calculations indicate that the rate determining step for the decomposition of IrO 2 is the recombination of two on-top O adatoms. The thermally induced decomposition of IrO 2 (110) sets in already at 433–443 K …”

Section: Complex Surface-redox-chemistry Of Rutheniummentioning

confidence: 99%

Surface Chemistry of Ruthenium Dioxide in Heterogeneous Catalysis and Electrocatalysis: From Fundamental to Applied Research

Over¹

2012

Chem. Rev.

630

643

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“…Under UHV conditions, the IrO 2 (1 1 0) surface is reduced at $433 K, which is lower than the reduction temperature of RuO 2 (1 1 0) surface $583 K [22]. It is also worthwhile noting that the signature of 1f-cus-Ir + O top persists in the 433 and 443 K core-level spectra which display clear Ir 0 features.…”

Section: Cls Of Ir-4fmentioning

confidence: 88%

Deoxygenation of IrO2(110) surface: Core-level spectroscopy and density functional theory calculation

et al. 2010

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“…It corresponds to the Ru E 2g transverse optical phonon arising from the shear of the two sublattices of the hcp unit cell. 27 Such mode has been observed in Ru films and multilayers 27,28 as well as in other hcp metals. 29 The spectra of the other islands are very similar at room temperature.…”

Section: ■ Results and Discussionmentioning

confidence: 89%

Size Effects in the Verwey Transition of Nanometer-Thick Micrometer-Wide Magnetite Crystals

Campo

Ruiz-Gómez

et al. 2022

J. Phys. Chem. C

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We have monitored the Verwey transition in micrometer-wide, nanometer-thick magnetite islands on epitaxial Ru films on Al 2 O 3 (0001) using Raman spectroscopy. The islands have been grown by high-temperature oxygen-assisted molecular beam epitaxy. Below 100 K and for thicknesses above 20 nm, the Raman spectra correspond to those observed in bulk crystals and high-quality thin films for the sub-Verwey magnetite structure. At room temperature, the width of the cubic phase modes is similar to the best reported for bulk crystals, indicating a similar strength of electron–phonon interaction. The evolution of the Raman spectra upon cooling suggests that for islands thicker than 20 nm, structural changes appear first at temperatures starting at 150 K while the Verwey transition itself takes place at around 115 K. However, islands thinner than 20 nm show very different Raman spectra, indicating that while a transition takes place, the charge order of the ultrathin islands differs markedly from their thicker counterparts.

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Thermally decomposed (110) surface of RuO2 single crystal

Cited by 3 publications

References 30 publications

Surface Chemistry of Ruthenium Dioxide in Heterogeneous Catalysis and Electrocatalysis: From Fundamental to Applied Research

Surface Chemistry of Ruthenium Dioxide in Heterogeneous Catalysis and Electrocatalysis: From Fundamental to Applied Research

Deoxygenation of IrO2(110) surface: Core-level spectroscopy and density functional theory calculation

Size Effects in the Verwey Transition of Nanometer-Thick Micrometer-Wide Magnetite Crystals

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