3 edition of Electrocatalytic reduction of oxygen on modified oxide surfaces found in the catalog.
Electrocatalytic reduction of oxygen on modified oxide surfaces
by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va
Written in English
|Statement||Scott A. Chaffins and Vakula S. Srinivasan and Joseph Singer.|
|Series||NASA technical memorandum -- 101333.|
|Contributions||Srinivasan, Vakula S., Singer, Joseph., United States. National Aeronautics and Space Administration.|
|The Physical Object|
The oxygen reduction reaction (ORR) is an important electrode reaction for energy storage and conversion devices based on oxygen electrocatalysis. This paper introduces the thermodynamics, reaction kinetics, reaction mechanisms, and reaction pathways of ORR in aqueous alkaline media. Recent advances of the catalysts for ORR were extensively reviewed, including precious metals, Cited by: We reported that carbon black modified with cobalt and various transition metal ions (M) incorporated in a polypyrrole film (Co+MPPy/C) were good electrocatalysts for the reduction of oxygen (O 2).After heat treatment of the catalysts at to °C under argon atmosphere, which were prepared using with iron and iridium ions as M, the resulted catalysts gave rise to the reduction of O 2 at a Cited by: 9.
The electrocatalytic performance for the oxygen reduction of the prepared Mn 3 O 4 /CMK-3 composite was extensively studied as an air diffusion electrode material in comparison with the composite catalysts based on the other carbons (carbon nanotubes, activated carbon, and graphite).File Size: KB. 1 Article 2 Electrocatalytic Performance of Carbon Supported 3 WO 3-Contained Pd-W Nanoalloys for Oxygen 4 Reduction Reaction in Alkaline Media 5 Nan Cui, Zengfeng Guo, Wenpeng Li *, Xun Xu, Hongxia Zhao, Guang Dong, Xin Han, 6 Haoquan Zhang, Shuzheng Xu, Peipei Yu 7 [email protected](N.C.);@com(Z.G.);@com(X.X);[email protected] by: 3.
Electrocatalytic reduction of nitric oxide at electrodes modified with electropolymerized films of [Cr(v-tpy)2]3+ and their application to cellular NO determinations. Maskus M(1), Pariente F, Wu Q, Toffanin A, Shapleigh JP, Abruña HD. Author information: (1)Baker Laboratory, Department of Chemistry, Cornell University, Ithaca, New York , USACited by: Controllable Deposition of Platinum Layers on Oxide Surfaces for the Synthesis of Fuel Cell Catalysts, M. B. Vukmirovic, K. A. Kuttiyiel, H. Meng, R. R. Adzic, ChemElectroChem, , 3, - Tuning electrocatalytic activity of Pt monolayer shell by bimetallic Ir-M (M=Fe, Co, Ni or Cu) cores for the oxygen reduction reaction, K.
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Get this from a library. Electrocatalytic reduction of oxygen on modified oxide surfaces. [Scott A Chaffins; Vakula S Srinivasan; Joseph Electrocatalytic reduction of oxygen on modified oxide surfaces book United States. National Aeronautics and Space Administration.]. Modifying Pt catalysts using hydrophobic ionic liquids (ILs) has been demonstrated to be a facile approach for boosting the performance of Pt catalysts for the oxygen reduction reaction (ORR).
This work aims to deepen the understanding and initiate a rational molecular tuning of ILs for improved activity and stability. To this end, Pt/C catalysts were modified using a variety of 1-methyl-3 Cited by: Abstract. Oxygen (O 2) is the most abundant element in the Earth’s oxygen reduction reaction (ORR) is also the most important reaction in life processes such as biological respiration, and in energy converting systems such as fuel by: Electrocatalytic O 2 Reduction at Glassy Carbon Electrodes Modified with Dendrimer-Encapsulated Pt Nanoparticles Heechang Ye, and Richard M.
Crooks * Contribution from the Department of Chemistry, Texas A&M University, P.O. BoxCollege Station, Texas Recently, Hu also reported that carbon paste electrodes modified with sodium montmorillonite-methyl viologen showed an highly electrocatalytic reduction of oxygen to water by a four-electron change.
In this report, we developed a simple modified method to prepare sensitive oxygen electrode in which calixarene and MV were by: The preparation and electrochemical characterization of glassy carbon electrodes modified with plumbagin were investigated by employing cyclic voltammetry, chronoamperometry and rotating disc electrode techniques.
The cyclic voltammograms of the electroreduction of oxygen showed an enhanced current peak at approximately − V in air-saturated phosphate buffer pH = 7 and scan rate 10 mV Cited by: 9. Huisheng Peng, Xin Fang, in Polymer Materials for Energy and Electronic Applications, Counter Electrode.
As depicted in Sectioncounter electrode is an important component in dye sensitized solar electrons transfer from external circuit to the counter electrode, which is a catalytic material to transfer electrons into electrolyte to regenerate the redox couple.
thionin incorporated onto MWCNTs modified glassy car- bon electrode for electrocatalytic reduction of H 2 O 2 and oxygen was evaluated by cyclic voltammetry and amper. Electrocatalytic Reduction of Carbon Dioxide Using Pt/C-TiO2 Nanocomposite Cathode Article (PDF Available) in Electrochemical and Solid-State Letters 15(1):B5-B8 January with Reads.
DNA-modified surfaces with no Fe(CN)6 3-present provides an independent measure of GMB, RDE voltammetry provides a convenient method for evaluating kobs directly. Figure shows Koutecky-Levich plots for the electrocatalytic reduction of Fe(CN)6. Metalated porphyrins have been described to bind nucleic acids.
Additionally, cobalt porphyrins present catalytic properties towards oxygen reduction. In this work, a carboxylic acid-functionalized cobalt porphyrin was physisorbed on reduced graphene oxide, then immobilized on glassy carbon electrodes. The carboxylic groups were used to covalently graft amino-terminated oligonucleotide probes Cited by: 9.
Electrocatalytic Evolution of Oxygen Gas at Cobalt Oxide Nanoparticles Modified Electrodes during the anodic-going potential scan. On the other hand, the reduction of Au-oxide is observed as a reduction peak centered at ca. The slight decrease in the intensity of the modified electrodes The electrocatalytic activity of the nano.
Impacts of oxygen vacancies on the electrocatalytic activity of AuTiO 2 nanocomposites towards oxygen reduction Samantha W. Sweeney a, Graham Roseman a, Christopher P. Deming a, Nan Wang b, Tuan Anh Nguyen a, Glenn L. Millhauser a, Shaowei Chen a,* a Department of Chemistry and Biochemistry, University of California, High Street, Santa Cruz, CAUSA b New Energy Research File Size: 2MB.
Synthesis and Characterizations of Zinc Oxide on Reduced Graphene Oxide for High Performance Electrocatalytic Reduction of Oxygen. Molecules23(12), ; This manuscript describes the preparation of zinc oxide modified reduced graphene via hydrothermal method for oxygen reduction reaction.
Although authors conducted several Cited by: 1. In the context of aqueous electrocatalytic CO 2 reduction studies where heterogeneous catalysts such as metal foils,13−17 metal nanostructures,18−26 oxide-derived metals,27−29 2D materials,30 carbon nanomaterials,31−33 as well as bioinspired catalysts,34−37 and homogeneous molecular catalysts38−47 are.
A novel SrNbCoO3−δelectrode material, which possesses not only high electrical conductivity but also large oxygen vacancy concentration at – °C, shows an excellent performance in the application of reduced temperature solid-oxide fuel by: Unifying Kinetic and Thermodynamic Analysis of 2 e – and 4 e – Reduction of Oxygen on Metal Surfaces journal, March Hansen, Heine A.; Viswanathan, Venkatasubramanian; Nørskov, Jens K.
The Journal of Physical Chemistry C, Vol. Issue G-PMFs have large specific surface areas of to m 2 g −1 and exhibited high electrocatalytic activity, good durability and high selectivity for the oxygen reduction reaction. The performance of the Zn–air fuel cell with a G-PMF anode was tested and found to be comparable to that of the Zn–air cell with a commercial Pt/C anode.
The catalyst demonstrates significant electrocatalytic activity towards ORR: a high limit current density, near an apparent quasi four electron oxygen reduction, and low yield of peroxide species in alkaline solutions, which suggestes the potential application of Ca 2 MnO 4 as cheap and abundant ORR catalysts.
The catalytic activities of Ca-Mn. techniques. This work involves a so-called “non-situ” approach in which the electrocatalytic chemistry is modeled in ultrahigh vacuum (UHV).
While the restriction of UHV conditions imposes important limitations, it does permit detailed characterization (using both experiment and theory) of oxygen reduction chemistry on model surfaces. The Cover Feature illustrates the interplay between the activity for the oxygen evolution reaction and the battery charge state of LiMn 2 O 4 when used as a catalyst.
The electrocatalyst remains in the discharged battery state at pH 14, whereas a charged battery state is observed as manganese oxidizes at lower pH values, wich leads to catalyst deactivation.A new class of oxygen reduction reaction (ORR) catalysts based on graphene quantum dots (GQDs) supported by graphene nanoribbons (GNRs) has been developed through a one-step simultaneous reduction reaction, leading to ultrahigh performance for O reduction with an excellent electrocatalytic activity (higher limiting current density and lower overpotential than those of platinum) and high Cited by: dispersed homogeneously in the matrix and the electrocatalytic acti~ity toiiards oxygen reduction reaction was very promising.
The chemical incorporation of Pt into polyaniline composite films is a promising method of obtaining three-dimensionally dispersed electrocatalyst systems for .