(Invited) Enhancement of Oxidation of Dimethyl Ether through Applicationof Metal-Oxide-Supported Noble Metal Catalytic Nanoparticles: Comparison to Behavior of Other Simple Organic Fuels

2021 ◽  
Vol MA2021-01 (47) ◽  
pp. 1890-1890
Author(s):  
Iwona Rutkowska ◽  
Pawel J. Kulesza
Keyword(s):  
Metal Oxide ◽  
Dimethyl Ether ◽  
Noble Metal ◽  
Catalytic Nanoparticles ◽  
Organic Fuels

scholarly journals Exterior and Internal Uniform Loading of Pt Nanoparticles on Yolk-Shell La2O3 by Acoustic Levitation Synthesis with Enhanced Photocatalytic Performance

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 107 ◽  
Author(s):  
Ming Qin ◽  
Qing Chang ◽  
Yinkai Yu ◽  
Hongjing Wu
Keyword(s):  
Metal Oxide ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Shell Structure ◽  
Photocatalytic Performance ◽  
Chemical Interaction ◽  
Pt Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Homogeneous Distribution ◽  
Acoustic Levitation

By the deposition of noble metal nanoparticles on a metal oxide substrate with a specific micro-/nanostructure, namely, yolk-shell structure, a remarkable improvement in photocatalytic performance can be achieved by the composites. Nevertheless, noble metal nanoparticles only distribute on the surface shell of metal oxide substrates when the conventional wet-chemistry reduction approach is employed. Herein, we proposed a novel acoustic levitation synthesis of Pt nanoparticles deposited on yolk-shell La2O3. The composites not only displayed well-defined, homogeneous distribution of Pt NPs on the exterior shell of La2O3 and the interior La2O3 core, but an enhanced chemical interaction between Pt and La2O3. The unique structure not only can display improved photocatalytic degradation rate toward methyl orange, but also may show great potential in fields of hydrogen generation, environmental protection, etc. The novel acoustic levitation synthesis can supplement the methodology of synthesizing well dispersed noble metal oxides over the whole yolk-shell structure through noble metal NPs deposition method.

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

2016 ◽  
Vol 40 (12) ◽  
pp. 10108-10115 ◽  
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.

Design and engineering of high-performance photocatalytic systems based on metal oxide–graphene–noble metal nanocomposites

2017 ◽  
Vol 2 (4) ◽  
pp. 422-439 ◽  
Author(s):  
Narendra Singh ◽  
Jai Prakash ◽  
Raju Kumar Gupta
Keyword(s):  
Metal Oxide ◽  
Noble Metal ◽  
High Performance ◽  
Optoelectronic Properties ◽  
Functional Nanomaterials ◽  
Metal Nanocomposites ◽  
Structural And Optoelectronic Properties

Coupling metal oxide photocatalysts with functional nanomaterials such as noble metal- and molecular graphene-based nanostructures and engineering their structural and optoelectronic properties can lead to high-performance photocatalytic systems.

scholarly journals Enhancement of oxidation of dimethyl ether through application of zirconia matrix for immobilization of noble metal catalytic nanoparticles

2020 ◽  
Vol 24 (11-12) ◽  
pp. 3173-3183
Author(s):  
Iwona A. Rutkowska ◽  
Jakub P. Sek ◽  
Piotr Zelenay ◽  
Pawel J. Kulesza
Keyword(s):  
Dimethyl Ether ◽  
Cyclic Voltammetric ◽  
Oh Groups ◽  
Onset Potential ◽  
Oxidation Of Methanol ◽  
Catalytic Nanoparticles ◽  
Catalytic Sites ◽  
Metal Support ◽  
Current Densities ◽  
Metal Support Interactions

Abstract Electrocatalytic activity of Pt and bimetallic PtRu nanoparticles (both Vulcan supported and unsupported) toward electrooxidation of dimethyl ether (DME), a potential small organic molecule fuel, in an acid medium (0.5 mol dm−3 H2SO4) has been significantly enhanced by dispersing them over a thin film of zirconia (ZrO2). The enhancement effects concern increases of the DME electrocatalytic current densities recorded under both cyclic voltammetric and chronoamperometric conditions. Similar effects have been observed for the oxidation of methanol. Regarding the dissimilar DME electrooxidation mechanisms at Pt and PtRu catalytic centers, the activating capabilities of zirconia seem to originate from the high population of reactive –OH groups favoring mobility of protons and the capability of inducing the oxidative removal of poisoning (CO-type) intermediates both at platinum and ruthenium catalytic sites. In the presence of the zirconia matrix, the onset potential for the oxidation of DME (particularly at PtRu) is shifted more than 50 mV toward less positive potentials. Mutual metal-support interactions are also postulated.

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