Multi-component noble metal catalysts prepared by sequential deposition precipitation for low temperature decomposition of dioxin

Okumura, Mitsutaka; Akita, Tomoki; Haruta, Masatake; Wang, X.; Kajikawa, O.; Okada, Osamu

doi:10.1016/s0926-3373(02)00200-x

Cited by 61 publications

(29 citation statements)

References 13 publications

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“…Experimentally, a Au/IrO 2 /TiO 2 catalyst was reported to be a good catalyst for oxidative reactions at high temperatures [73,74]. This enhanced high-temperature activity is confirmed by the recent DFT calculation by Liu, Jenkins, and King [75].…”

Section: Co + O → Co 2 In Co Oxidationmentioning

confidence: 59%

Chemical reactions at surfaces and interfaces from first principles: Theory and application

Liu

2004

Pure and Applied Chemistry

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Abstract:The last decade has seen rapid expansion and development in the field of density functional theory (DFT) simulation on the complex chemical processes that occur at surfaces and interfaces. The understanding of the phenomena in surface science and heterogeneous catalysis has benefited tremendously from these quantum mechanic calculations. This article reviews current progress in the theory of reactions on surfaces, in particular, those relevant to the barrier and the active site of surface reactions. Two representative reactions, namely, NO dissociation and CO oxidation, are selected to illustrate how these theoretical concepts are applied to understand catalytic reactions. Here, the pathways and energetics of these reactions under various catalytic conditions are described in detail, and the understanding of the reactions is generalized. It is concluded that DFT-based methods can be well applied to catalysis to understand the electronic structure of chemical processes and to elucidate mechanisms of complex surface reactions.

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Section: Co + O → Co 2 In Co Oxidationmentioning

confidence: 59%

Chemical reactions at surfaces and interfaces from first principles: Theory and application

Liu

2004

Pure and Applied Chemistry

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“…The idea is to combine synergistically the different performances of each precious metal by choosing the most suitable support for a target reaction and then by integrating them into a single catalytic system. An integrated catalyst composed of Pd/SnO2, Ir/La2O3, and Au/Fe2O3 exhibited enhanced catalytic activities not only for dioxin decomposition but also for the oxidation of H2 and (CH3)3N (28).…”

Section: Preparation Of Nanoparticulate Au Catalystsmentioning

confidence: 99%

“…(28). The second direction involves application of the mechanism of Au catalysis and the techniques developed for preparing Au catalysts to other noble metals.…”

Section: Applications and Future Prospect Of Gold Catalystsmentioning

confidence: 99%

Gold as a novel catalyst in the 21st century: Preparation, working mechanism and applications

2004

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Gold can be deposited as nanoparticles on a variety of support materials by coprecipitation or depositionprecipitation of Au(OH)3, grafting of organo-gold complexes such as dimethyl-Au(III)-acetylacetonate, mixing of colloidal Au particles, and vacuum deposition. Owing to the moderate adsorption of at least one of reactants (for example, CO) on the edges and corners of Au nanoparticles and to the activation of the counter reactant (for example, O2) at the perimeter interface with the supports, supported Au nanoparticle catalysts exhibit unique and practically useful catalytic properties at relatively low temperature below 473K. They have already been commercially used for deodorizers in rest rooms in Japan and will find growing applications in indoor air quality control, pollutant emission control, production of hydrogen energy carrier, and innovations in chemical processes. Cluster science of Au may also open an exciting area of research showing some magic numbers for dramatic changes in reactivity.

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“…The prevention of sulfur or compounds containing sulfur on PCDD/Fs formation through impacting the balance of Deacon Reaction has been reported (Raghunathan and Gullett, 1996). Certain complex catalysis systems such as V 2 O 5 , Cr 2 O 3 , Fe 2 O 3 and MgO supported with TiO 2 have been used to decompose PCDD/Fs in laboratory-scale and real municipal waste incinerator (Bonte et al, 2002;Cho and Ihm, 2002;Lomnicki and Dellinger, 2003;Okumura et al, 2003). The inhibition of PCDDs formation by alkaline substances has been demonstrated by some research groups (Dickson et al, 1989;Naikwadi and Karasek, 1989;Ross et al, 1990).…”

Section: Introductionmentioning

confidence: 98%

Influence of metal oxides on PCDD/Fs formation from pentachlorophenol

et al. 2005

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The total suppressing efficiencies of several metal oxides including CaO, BaO, PbO, Ag 2 O, HgO and SnO which have lower Z/r (charge to radius ratio) <2 are all over 90%. The theories of generalized acid-base and atomic parameter (Z/r) were used to speculate the effecting mechanisms. The factors including time and temperature on suppressing efficiencies of CaO, BaO and PbO have also been studied in the present paper. The results showed that the total suppressing efficiencies of CaO, BaO and PbO increase with the increase of heated time and temperature.

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Multi-component noble metal catalysts prepared by sequential deposition precipitation for low temperature decomposition of dioxin

Cited by 61 publications

References 13 publications

Chemical reactions at surfaces and interfaces from first principles: Theory and application

Chemical reactions at surfaces and interfaces from first principles: Theory and application

Gold as a novel catalyst in the 21st century: Preparation, working mechanism and applications

Influence of metal oxides on PCDD/Fs formation from pentachlorophenol

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