Special Issue on Surface in Electrochemistry. Modeling and Catalytic Properties of the Ultrafine Noble Metal Particles Electrode.

Automotive catalysts generally lose-agtivity during vehicle operation due to several well-known deactivation mechanisms. To gain a more fundamental understanding of catalyst deactivation, the microscopic details of fresh and vehicle-aged commercial pelleted automotive exhaust catalysts containing Pt, Pd and Rh were studied by employing Analytical Electron Microscopy (AEM). Two different vehicle-aged samples containing similar poison levels but having different catalytic activities (denoted better and poorer) were selected for this study.The general microstructure of the supports and the noble metal particles of the two catalysts looks similar; the noble metal particles were generally found to be spherical and often faceted. However, the average noble metal particle size on the poorer catalyst (21 nm) was larger than that on the better catalyst (16 nm). These sizes represent a significant increase over that found on the fresh catalyst (8 nm). The activity of these catalysts decreases as the observed particle size increases.

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Styrene-divinylbenzene polymer oxidation catalyst

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19812657 ◽

1981 ◽

Vol 46 (11) ◽

pp. 2657-2662

Author(s):

Zdeněk Prokop ◽

Karel Setínek

Keyword(s):

Functional Groups ◽

Noble Metal ◽

Additional Data ◽

Catalytic Properties ◽

Metal Catalysts ◽

Oxidation Catalyst ◽

Noble Metal Catalysts ◽

Polymer Catalyst ◽

Styrene Divinylbenzene ◽

Polymer Oxidation

Some additional data about properties and applicability of a styrene-divinylbenzene polymer catalyst containing acidic and redox functional groups are reported. It is shown that the catalysts of this type can be prepared reproducibly and exhibit catalytic properties comparable to the properties of noble metal catalysts.

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Rapid preparation of noble metal nanocrystals via facile coreduction with graphene oxide and their enhanced catalytic properties

Nanoscale ◽

10.1039/c1nr10439j ◽

2011 ◽

Vol 3 (9) ◽

pp. 3737 ◽

Cited By ~ 40

Author(s):

Guolei Xiang ◽

Jie He ◽

Tianyang Li ◽

Jing Zhuang ◽

Xun Wang

Keyword(s):

Graphene Oxide ◽

Noble Metal ◽

Catalytic Properties ◽

Rapid Preparation ◽

Metal Nanocrystals

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A Universal Approach to the Synthesis of Noble Metal Nanodendrites and Their Catalytic Properties

Angewandte Chemie ◽

10.1002/ange.201000902 ◽

2010 ◽

Vol 122 (29) ◽

pp. 5082-5086 ◽

Cited By ~ 43

Author(s):

Ashok Mohanty ◽

Niti Garg ◽

Rongchao Jin

Keyword(s):

Noble Metal ◽

Catalytic Properties ◽

Universal Approach

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Mn3O4 doped with highly dispersed Zr species: a new non-noble metal oxide with enhanced activity for three-way catalysis

New Journal of Chemistry ◽

10.1039/c6nj02272c ◽

2016 ◽

Vol 40 (12) ◽

pp. 10108-10115 ◽

Cited By ~ 9

Author(s):

Genyuan Zhao ◽

Jing Li ◽

Wenshuang Zhu ◽

Xueqin Ma ◽

Yonghua Guo ◽

...

Keyword(s):

Metal Oxide ◽

Manganese Oxide ◽

Noble Metal ◽

Storage Capacity ◽

Catalytic Properties ◽

Oxygen Storage Capacity ◽

Oxide Catalysts ◽

Oxygen Storage ◽

Highly Dispersed ◽

Three Way Catalysis

Herein, we demonstrate the influence of zirconium species on promoting the oxygen storage capacity and three-way catalytic properties of zirconium-manganese oxide catalysts.

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Various Applications of Silver Nano-Particles by Ultrasonic Eco-Fabrication

Materials Science Forum ◽

10.4028/www.scientific.net/msf.486-487.530 ◽

2005 ◽

Vol 486-487 ◽

pp. 530-533 ◽

Cited By ~ 1

Author(s):

Yamato Hayashi ◽

Hirotsugu Takizawa ◽

Yoshitaka Saijo ◽

Tohru Sekino ◽

Katsuaki Suganuma ◽

...

Keyword(s):

Metal Oxides ◽

Noble Metal ◽

Room Temperature ◽

Silver Oxide ◽

Nano Particles ◽

Metal Particles ◽

Noble Metal Oxides ◽

Alcohol System ◽

Silver Metal ◽

Suitable Process

Applications of silver nano-sized metal particles were investigated for a new, ecologically friendly and economical liquid-solid (silver oxide-alcohol) system. Silver metal oxides as starting materials have merits in metal particles fabrication because these materials are decomposed only by heating in air. That is, noble metal oxide does not use thestrong reduction atmosphere. This reduction is ecologically clean because many noble metal oxides are not toxic, and because O2 is evolved during decomposition. We reduced silver metal oxides by ultrasound and fabricated silver nano metal nanoparticles at room temperature, and various applications were investigated. By choosing a suitable process and conditions, it is reasonable to expect that ultrasonic eco-fabrications can be extended to obtain various silver nano-particles containing materials.

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