Oxygen storage capacity of monolith three-way catalysts

Su, E.C.; Montreuil, Cliff; Rothschild, Walter G.

doi:10.1016/s0166-9834(00)82704-9

Cited by 143 publications

(29 citation statements)

References 13 publications

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“…The use of OSC components was first proposed by Ghandi et al in 1976. [4] Since the pioneering works of Yao and Yu Yao [2] and of Su et al, [5,6] many studies have been devoted to improving knowledge of the kinetics of OSC [7][8][9] and of the mechanisms implicated in surface and bulk oxygen mobility in ceria and related compounds, [10][11][12][13][14] with a special insight into CeZrO x oxides. [15][16][17][18][19] Oxygen diffusivity in these materials can be measured by 18 O/ 16 O isotopic exchange, [20][21][22] while oxygen species (e.g., superoxides, peroxides) that might be involved in the diffusion process can be investigated by electron spin resonance (ESR) [23][24][25][26][27] or FTIR.…”

Section: Introductionmentioning

confidence: 99%

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

362

244

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Ceria has been the subject of thorough investigations, mainly because of its use as an active component of catalytic converters for the treatment of exhaust gases. However, ceria‐based catalysts have also been developed for different applications in organic chemistry. The redox and acid–base properties of ceria, either alone or in the presence of transition metals, are important parameters that allow to activate complex organic molecules and to selectively orient their transformation. Pure ceria is used in several organic reactions, such as the dehydration of alcohols, the alkylation of aromatic compounds, ketone formation, and aldolization, and in redox reactions. Ceria‐supported metal catalysts allow the hydrogenation of many unsaturated compounds. They can also be used for coupling or ring‐opening reactions. Cerium atoms can be added as dopants to catalytic system or impregnated onto zeolites and mesoporous catalyst materials to improve their performances. This Review demonstrates that the exceptional surface (and sometimes bulk) properties of ceria make cerium‐based catalysts very effective for a broad range of organic reactions.

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Section: Introductionmentioning

confidence: 99%

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

362

244

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“…With regard to the role of Ce~O3 and La~O3 in catalysts, a number of previous studies have shown that Ce203 can act as an oxygen storage component enhancing the oxidation activity of catalyst [5]. It not only increases and stabilizes the dispersity of the noble metal on the catalysts [6], but is also an alumina stabilizer [7] and a promoter of oxidation reaction [8].…”

Section: Resultsmentioning

confidence: 99%

The high-temperature durability of Rh-free threeway catalysts used for automoble emission control

Cheng

et al. 1998

React Kinet Catal Lett

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The high-temperature durability of cordiorite honeycomb Rh-free three-way catalysts (TWC) containing additives has been studied by calcining catalysts at various temperatures in the interval of 600-1100oC. The three-way performances of these catalysts were evaluated for the reaction of carbon monoxide(CO), hydrocarbon(HC) and nitrogen oxides(NOx) at given conditions by using a fixed bed reactor. The results show that after Rh-free TWC are thermally aged in air at II00oC for 5 h and 950~ for 104 h, the TWC still have better three-way activity compared with Kh-containing TWC.

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“…Since the pioneer's works of Yao and Yu Yao [12] and of Su et al [13], redox properties of ceria and related oxides were extensively studied, firstly for applications in automotive converters [14][15][16][17], and later for various applications in synthesis chemistry [18], as anti-corrosion agent [19], etc. A detailed analysis of the literature (several hundred papers) is out of the scope of this review.…”

Section: Redox Propertiesmentioning

confidence: 99%