Reaction of Ethylene with Clean and Carbide-Modified Mo(110):  Converting Surface Reactivities of Molybdenum to Pt-Group Metals

and, B. Frühberger; Chen, J. G.

doi:10.1021/ja960656l

Cited by 105 publications

(116 citation statements)

References 35 publications

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“…Frühberger and Chen also reported that surface modified by carbon converts the reactivity of Mo to that of Pt-group metals [101]. In particular, the catalytic activity of metal carbides can approach or surpass that of Pt-group metals in reaction like hydrogenation and dehydrogenation [102].…”

Section: Non-noble Metal Catalystsmentioning

confidence: 99%

An Overview on Catalytic Hydrodeoxygenation of Pyrolysis Oil and Its Model Compounds

et al. 2017

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Abstract:Pyrolysis is considered the most promising way to convert biomass to fuels. Upgrading biomass pyrolysis oil is essential to produce high quality hydrocarbon fuels. Upgrading technologies have been developed for decades, and this review focuses on the hydrodeoxygenation (HDO). In order to declare the need for upgrading, properties of pyrolysis oil are firstly analyzed, and potential analysis methods including some novel methods are proposed. The high oxygen content of bio-oil leads to its undesirable properties, such as chemical instability and a strong tendency to re-polymerize. Acidity, low heating value, high viscosity and water content are not conductive to making bio-oils useful as fuels. Therefore, fast pyrolysis oils should be refined before producing deoxygenated products. After the analysis of pyrolysis oil, the HDO process is reviewed in detail. The HDO of model compounds including phenolics monomers, dimers, furans, carboxylic acids and carbohydrates is summarized to obtain sufficient information in understanding HDO reaction networks and mechanisms. Meanwhile, investigations of model compounds also make sense for screening and designing HDO catalysts. Then, we review the HDO of actual pyrolysis oil with different methods including two-stage treatment, co-feeding solvents and in-situ hydrogenation. The relative merits of each method are also expounded. Finally, HDO catalysts are reviewed in order of time. After the summarization of petroleum derived sulfured catalysts and noble metal catalysts, transitional metal carbide, nitride and phosphide materials are summarized as the new trend for their low cost and high stability. After major progress is reviewed, main problems are summarized and possible solutions are raised.

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Section: Non-noble Metal Catalystsmentioning

confidence: 99%

An Overview on Catalytic Hydrodeoxygenation of Pyrolysis Oil and Its Model Compounds

et al. 2017

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“…A large body of literature exists on the possibility of using transition metal carbides to mimic the catalytic properties of Pt-group metals [12][13][14][15][16][17][18]. In particular, there have been many studies on tungsten and molybdenum carbides since Levy and Boudart suggested that WC displayed Pt-like behavior in several catalytic reactions [18].…”

Section: Introductionmentioning

confidence: 99%

Cyclic voltammetry and X-ray photoelectron spectroscopy studies of electrochemical stability of clean and Pt-modified tungsten and molybdenum carbide (WC and Mo2C) electrocatalysts

Weigert

Esposito

Chen

2009

Journal of Power Sources

103

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“…A large body of literature exists on the possibility of using transition metal carbides to mimic the catalytic properties of Pt-group metals [13][14][15][16][17][18]. In particular, there have been many studies on tungsten carbides (WC and W 2 C) since Levy and Boudart suggested that WC displayed Pt-like behavior in several catalytic reactions [19].…”

Section: Introductionmentioning

confidence: 99%

A Combined Surface Science and Electrochemical Study of Tungsten Carbides as Anode Electrocatalysts

et al. 2007

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An effective anode electrocatalyst in direct methanol fuel cell (DMFC) should have high activity for the oxidation of methanol and the decomposition of water, while remaining stable under the relatively harsh anode environment. Although the Pt/Ru bimetallic alloy is currently the most effective anode electrocatalyst, both Pt and Ru are expensive due to limited supplies and both are susceptible to CO poisoning. Consequently, the discovery of less expensive and more CO tolerant alternatives to the Pt/Ru catalysts would help facilitate the commercialization of DMFC. In this paper we will discuss the possibility of using tungsten carbides (WC) and Pt-modified WC as potential anode electrocatalysts in DMFC. We will provide an overview of our recent work, using a combined approach of fundamental surface science studies and in-situ electrochemical evaluation of the activity and stability of tungsten carbides. We will demonstrate the feasibility to bridge fundamental surface science studies on single crystals with the electrochemical evaluation on polycrystalline WC films. We will also discuss the synergistic effect by supporting low coverages of Pt on the WC substrate to further enhance the electrochemical performance of WC.

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Reaction of Ethylene with Clean and Carbide-Modified Mo(110): Converting Surface Reactivities of Molybdenum to Pt-Group Metals

Cited by 105 publications

References 35 publications

An Overview on Catalytic Hydrodeoxygenation of Pyrolysis Oil and Its Model Compounds

An Overview on Catalytic Hydrodeoxygenation of Pyrolysis Oil and Its Model Compounds

Cyclic voltammetry and X-ray photoelectron spectroscopy studies of electrochemical stability of clean and Pt-modified tungsten and molybdenum carbide (WC and Mo2C) electrocatalysts

A Combined Surface Science and Electrochemical Study of Tungsten Carbides as Anode Electrocatalysts

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