Catalytic reduction of NO by CO over Pd — doped Perovskite-type catalysts

Христова, M.; Petrović, Srdjan P.; Terlecki-Baricevic, A.; Mehandjiev, D.

doi:10.2478/s11532-009-0065-4

Cited by 10 publications

(5 citation statements)

References 21 publications

(29 reference statements)

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“…For practical application, catalytic NO reduction is preferred, and this technology has already been industrialized. Perovskite oxides are also good catalysts for catalytic NO reduction, using either CO, − NH 3 , − hydrocarbons (C x H y ), , or H 2 − as reducing agent. The presence of reducing agent compensates for the inadequacy of reducing capacity and mitigates the dependence of activity on the redox potentials of perovskite oxide catalysts.…”

Section: Applications In Catalysismentioning

confidence: 99%

Perovskite Oxides: Preparation, Characterizations, and Applications in Heterogeneous Catalysis

et al. 2014

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Perovskite oxides with formula ABO3 or A2BO4 are a very important class of functional materials that exhibit a range of stoichiometries and crystal structures. Because of the structural features, they could accommodate around 90% of the metallic natural elements of the Periodic Table that stand solely or partially at the A and/or B positions without destroying the matrix structure, offering a way of correlating solid state chemistry to catalytic properties. Moreover, their high thermal and hydrothermal stability enable them suitable catalytic materials either for gas or solid reactions carried out at high temperatures, or liquid reactions carried out at low temperatures. In this review, we addressed the preparation, characterization, and application of perovskite oxides in heterogeneous catalysis. Preparation is an important issue in catalysis by which materials with desired textural structure and physicochemical property could be achieved; characterization is the way to explore and understand the textural structures and physicochemical properties of the material; however, application reflects how and where the material could be used and what it can solve in practice, which is the ultimate goal of catalysis. This review is organized in five sections: (1) a brief introduction to perovskite oxides, (2) preparation of perovskite oxides with different textural structures and surface morphologies, (3) general characterizations applied to perovskite oxides, (4) application of perovskite oxides in heterogeneous catalysis, and (5) conclusions and perspectives. We expected that the overview on these achievements could lead to research on the nature of catalytic performances of perovskite oxides and finally commercialization of them for industrial use.

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Section: Applications In Catalysismentioning

confidence: 99%

Perovskite Oxides: Preparation, Characterizations, and Applications in Heterogeneous Catalysis

et al. 2014

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“…Since the reaction of CO and NO can eliminate two harmful pollution gases simultaneously, it has attracted a great deal of attention especially in automobile exhaust applications in a wide range of temperature and pressure [1,2]. Typically, noble metals such as Rh, Pt, and Pd are employed for the NO reduction and CO oxidation [3][4][5][6][7][8][9]. Among the studies reported so far, the NO reduction by CO and co-adsorption on Pd surfaces, as well as co-adsorption of NO and CO on platinum catalysts, have been extensively studied [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Typically, noble metals such as Rh, Pt, and Pd are employed for the NO reduction and CO oxidation [3][4][5][6][7][8][9]. Among the studies reported so far, the NO reduction by CO and co-adsorption on Pd surfaces, as well as co-adsorption of NO and CO on platinum catalysts, have been extensively studied [6][7][8][9]. The formation and migration of isocyanate species are considered to be crucial for efficient catalytic cycles [8].…”

Section: Introductionmentioning

confidence: 99%

Structure and Catalytic Behavior of Alumina Supported Bimetallic Au-Rh Nanoparticles in the Reduction of NO by CO

Wang

Maeda

et al. 2019

Catalysts

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Alumina-supported bimetallic AuRh catalysts, as well as monometallic reference catalysts, were examined with regard to their structural and catalytic properties in the reduction of NO by CO. Depending on the molar ratio of Au:Rh, the nanoparticles prepared by borohydride co-reduction of corresponding metal salt solutions had a size of 3.5–6.7 nm. The particles consisted of well-dispersed noble metal atoms with some enrichment of Rh in their surface region. NO conversion of AuRh/Al2O3 shifted to lower temperatures with increasing Rh content, reaching highest activity and highest N2 selectivity for the monometallic Rh/Al2O3 catalyst. This behavior is attributed to the enhanced adsorption of CO on the bimetallic catalyst resulting in unfavorable cationic Rh clusters Rh+-(CO)2. Doping with ceria of AuRh/Al2O3 and Rh/Al2O3 catalysts increased the surface population of metallic Rh sites, which are considered most active for the reduction of NO by CO and enhancement of the formation of intermediate isocyanate (-NCO) surface species and their reaction with NO to form N2 and CO2.

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“…A LaTi 0.5 Mg 0.5 O 3 catalyst with Pd added showed promising activity in the reduction of NO with CO and it was concluded that the distribution of Pd at the interface is responsible for the steering of the reaction between the reduction of NO by CO and direct NO decomposition [108].…”

Section: Titanatesmentioning

confidence: 99%

Metal–Perovskite Interfacial Engineering to Boost Activity in Heterogeneous Catalysis

Malleier,

Penner

2024

Surfaces

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In this review, we have assessed the possibility of metal–perovskite interfacial engineering to enhance the catalytic activity and selectivity in a range of heterogeneous catalytic reactions. We embarked on a literature screening of different perovskite material classes and reactions to show the versatility of the perovskite structures to induce the formation of such hetero-interfaces and the widespread nature of the phenomenon in catalytic research. There is almost no limitation on the chemical composition of the used perovskites and the nature of the catalyzed reaction, be it under reduction or oxidation conditions. We attempted to classify the perovskite materials, discuss the different strategies leading to the hetero-interfaces, and detail the synergistic action of the components of the respective interfaces. We also provide a critical assessment of the large body of data that is available in terms of a knowledge-based approach to the comparison of differently prepared interfaces with varying interfacial extent to gain a deeper understanding of the bi-functional operation of the interfaces and the urgent necessity to study and characterize such interfaces under realistic operation conditions.

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Catalytic reduction of NO by CO over Pd — doped Perovskite-type catalysts

Cited by 10 publications

References 21 publications

Perovskite Oxides: Preparation, Characterizations, and Applications in Heterogeneous Catalysis

Perovskite Oxides: Preparation, Characterizations, and Applications in Heterogeneous Catalysis

Structure and Catalytic Behavior of Alumina Supported Bimetallic Au-Rh Nanoparticles in the Reduction of NO by CO

Metal–Perovskite Interfacial Engineering to Boost Activity in Heterogeneous Catalysis

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