catalytic oxidation of hydrogen on nickel oxides and nickel telluride.

catalytic oxidation of hydrogen on nickel oxides and nickel telluride. by David McCrory Jamieson Download PDF EPUB FB2

Nickel forms a series of mixed oxide compounds which are commonly called nickelates. A nickelate is an anion containing nickel or a salt containing a nickelate anion, or a double compound containing nickel bound to oxygen and other elements.

Nickel can be in different or even mixed oxidation states, ranging from +1, +2, +3 to +4. Effect of nickel oxide additives on the oxidation selectivity of carbon monoxide in the presence of hydrogen was studied for the widely recognized system constituted by copper and cerium oxides.

@article{osti_, title = {The catalysis of the oxygen evolution reaction by iron impurities in thin film nickel oxide electrodes}, author = {Corrigan, D A}, abstractNote = {The effects of iron coprecipitated into thin film nickel oxide electrodes or introduced in the 25 weight percent KOH electrolyte were studied by a combination of galvanostatic and open-circuit decay methods.

Oxidation kinetics of high purity nickel, as well as the nonstoichiometry and chemical diffusion in nickel oxide have been studied as a function of temperature (– K) and oxygen pressure. The catalytic activity of 21 metal oxides in the Claus reaction and also in oxidation of H 2 S by oxygen has been investigated.

Only part of them exhibited a stable activity. Among them, vanadium oxide was the most active catalyst in the Claus reaction as well as in total and partial oxidation of H 2 S. The remaining oxides were deactivated, mainly due to the interaction with H 2 S and Cited by:   Highly efficient electrocatalysts for both hydrogen evolution and hydrogen oxidation have been designed, synthesized, and characterized.

The catalysts in their resting states are air-stable, mononuclear nickel(II) complexes containing cyclic diphosphine ligands with nitrogen bases incorporated into the ligand backbone.

X-ray diffraction studies have established that the cation of [Ni(PPh2NPh2 Cited by: EUGENE, Ore. — (Ma ) — University of Oregon chemists say that ultra-thin films of nickel and iron oxides made through a solution synthesis process are promising catalysts to combine with semiconductors to make devices that capture sunlight and convert water.

Catalytic Water Oxidation by a Bio-inspired Nickel Complex with a Redox-Active Ligand Dong Wang * and Charlie O. Bruner † Department of Chemistry and Biochemistry and Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, MontanaUnited States.

Temperature dependence of the reaction rate of H2 oxidation on nickel oxide and solid solutions of nickel ions in MgO prepared at – K, has been studied. The variation of the catalytic properties with temperature is attributed to the catalytic oxidation of hydrogen on nickel oxides and nickel telluride.

book of nickel ions in different oxidation states simultaneously, i. Ni(II) and Ni(III).Cited by: 6. In the present work, Ni/α-Al 2 O 3 catalysts modified with different amounts of CaO and MgO were used for the production of hydrogen by catalytic partial oxidation (CPO) and wet-CPO processes of methane.

In the wet-CPO process, small additions of water were introduced into the feed of the reactor to improve both the H 2 yield and methane conversion. The addition of water is also beneficial Cited by: Nickel(II) oxide is the chemical compound with the formula is the principal oxide of nickel.

It is classified as a basic metal oxide. Several million kilograms are produced annually of varying quality, mainly as an intermediate in the production of nickel alloys. The mineralogical form of NiO, bunsenite, is very nickel(III) oxide have been claimed, e.g., NiAppearance: green crystalline solid.

The oxidation of nickel sulfide whose atomic fraction of sulfur,x s, is to was studied in a mixed O2-N2 gas stream at, and K. The oxygen partial pressure was maintained at x Pa.

In the oxidation of nickel sulfide ofx s = anda dense NiO layer was formed on the sulfide surface without the evolution of SO2 gas, because of the low sulfur by:   University of Oregon. (, March 20). Hydrogen fuel. Thin films of nickel and iron oxides yield efficient solar water-splitting catalyst.

ScienceDaily. Retrieved May 1, from www. A question of nobility: A biomimetic nickel thiolate complex (see scheme; TEA=triethylamine) exhibits unprecedented activity for the title using a low concentration of a sacrificial donor, the system maintains significant activity for at least 60 hours.

The enhanced stability of the system is ascribed to the ability to proceed through an oxidative quenching pathway. A STUDY OF OXIDATION KINIQICS OF NICKEL METAL IN FLOWING AIR AND OXYGEN-NITROGEN MI-S By D.

Progar and B. Lewis Langley Research Center A study was made of the oxidation kinetics of nickel metal sheet in flowing air and in oxygen-nitrogen mixtures of varying study covered the temperatures ° F, 17>0° F, ° F, ° F, and ° F and covered.

The partial oxidation of methane to syngas was studied in this work over Ni-containing ceria catalysts with nickel content of 5, 10 and 20at.% at atmospheric pressure. All catalysts, in the as prepared state, showed similar activity and CO selectivity at T C.

Catalyst pre-reduction was not required. nickel-based hydrogen oxidation catalysts developed by our group have been demonstrated to have remarkable tolerance to CO; they function under 5% CO, with no detectable loss of activity.

Pendant amines in the diphosphine ligand can lead to a profound acceleration of the catalytic rates in nickel electrocatalysts for oxidation of H 2. Nickel oxide (NiO) reduction and the subsequent Ni behaviour in hydrogen gas (H 2) are of practical importance in the fields of catalysis [1–5], ore reduction to produce metallic Ni [6–9] and solid oxide fuel cells (SOFCs), for which it determines the structure of the electronic con-ductor on the anode side during operation [10, 11].

Despite. (b) the reduction of nickel(II) oxide by carbon monoxide. Step-by-step solution: Chapter: CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 CH21 CH22 CH23 Problem: 1QP 2QP 3QP 4QP 5QP 6QP 7QP 8QP 9QP 10QP 11QP 12QP 13QP 14QP 15QP 16QP 17QP 18QP 19QP 20QP 21QP 22QP 23QP 24QP 25QP 26QP 27QP 28QP 29QP.

The most successful candidates developed for water oxidation so far have been oxides of ruthenium or iridium, which are both scarce and expensive.” The work is reported in a paper, “ Efficient Water Oxidation Using Nanostructured α‑Nickel-Hydroxide as an Electrocatalyst,” published in the Journal of the American Chemical Society (JACS.

Reactions of hydrogen with organic compounds over copper-chromium oxide with nickel catalysts [Adkins, Homer] on *FREE* shipping on qualifying offers. Reactions of hydrogen with organic compounds over copper-chromium oxide with nickel catalystsAuthor: Homer Adkins.

Previous article in issue: A Fluorescence-Lifetime-Based Binding Assay for Class IIa Histone Deacetylases. Previous article in issue: A Fluorescence-Lifetime-Based Binding Assay for Class IIa Histone Deacetylases Next article in issue: Bicyclo[]heptane as a Core Structure for Conformational Locking of 1,3-Bis-Pharmacophores, Exemplified by GABACited by: 8.

The best catalytic parameters of the series were obtained for the film of composition a-Fe20Ni An extrapolation of the electrochemical and XPS data indicates the optimal behavior of this binary film to be a manifestation of iron stabilizing nickel in a higher oxidation by: For the first time, noble-metal-free nickel phosphide (Ni2P) was used as an excellent catalyst precursor for water oxidation catalysis.

The lowest onset potential was observed at ∼ V (vs. RHE) and a Tafel slope of 60 mV dec−1 was obtained in alkaline solution (pH = ).Cited by: PREPARATION AND CHARACTERIZATION OF NICKEL BASED CATALYSTS FOR PARTIAL OXIDATION OF METHANE Hydrogen, which can be used in many fields without polluting the environment, is thought to be the cleanest fuel source of 21th century.

Therefore, low cost production, facile storage and transportation of hydrogen are important research subjects that are. In chemistry, a hydride is the anion of hydrogen, H −, or more commonly it is a compound in which one or more hydrogen centres have nucleophilic, reducing, or basic compounds that are regarded as hydrides, the hydrogen atom is bonded to a more electropositive element or groups.

Compounds containing hydrogen bonded to metals or metalloids may also be referred to as hydrides. It was found that a Fe content of approximately 10% resulted in the highest OER activity, with decreased activities for both larger and smaller Fe contents.

These results were found to be consistent with studies of Fe substituted nickel oxides and oxyhydroxides, suggesting a similar activation mechanism. MAY, OXIDATION WITH NICKEL PEROXIDE Oxidation with Nickel Peroxide.

Oxidation of Alcohols KUNIO NAKAGAWA, RYUSEI KONAKA, AND TADASI NAKATA Division of Engineering Chemistry, Shionogi Research Laboratory, Shimogi & Co., Ltd., Fukushima-ku, Osaka, Japan Received December 4, Nickel peroxide, readily obtainable by the treatment of nickel salts with sodium.

More information: J. Zheng et al. Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy, Science Advances ().DOI. Chemical-Looping Combustion (CLC) and Chemical-Looping Reforming (CLR) processes are technologies in development, considered as economically viable alternatives for CO2 mitigation.

Both processes employ two interconnected reactors (air reactor and fuel reactor), by which oxides particles (called oxygen carriers) circulate. CLC process produces heat with inherent separation of CO2 from Cited by: 2.

Nickel, chemical element, ferromagnetic metal of Group 10 (VIIIb) of the periodic table, markedly resistant to oxidation and corrosion. Silvery white, tough, and harder than iron, nickel is widely familiar because of its use in coinage but is more important as the pure metal or in the form of alloys.

Up to now, the classical catalysts that are applicable to HCHO oxidation under the ambient condition are categorized into two major types: noble metal (e.g., Pt, Pd, Au, and Ag) and metal oxides (e.g., TiO 2, MnO 2, and CuO).

Generally, noble metal NPs show a higher activity than later oxide-type NPs at room temperature [6,8,9]. Owing to their Cited by: 3. The hunt for platinum’s successor as a hydrogen oxidation catalyst continues in this month’s Nature Communications (Zhuang, Z.

et al. Nickel supported on nitrogen-doped carbon nanotubes as hydrogen oxidation reaction catalyst in alkaline Commun. doi: /ncomms ()). A research team from the University of Delaware, in partnership with. Carbon supported nickel has been shown to have high activity for HOR in AEMFCs, however the susceptibility of Ni to electrochemical oxidation, as well as the less than optimal hydrogen binding energy to the Ni active site, suggest there is further room for optimization of the Ni/C system [1].Author: Aaron Joseph Roy, Plamen Atanassov, Kateryna Artyushkova, Alexey Serov, Barr Zulevi, Morteza Rezaei.

3. Significance of Nickel Nanoparticles. Nickel NPs find potential applications in various fields including electronics, magnetism [], energy technology [], and biomedicines [].Due to their high reactivity, operational simplicity, and eco-friendly properties they are used to catalyze various organic reactions including chemoselective oxidative coupling of thiols [], reduction of aldehydes and Cited by: alloys were converted into cobalt or nickel catalysts supported on ZrO2 or ZrO2–Sm2O3 oxides.

Catalytic reaction Catalytic reaction was performed in a fixedbed flow glass reactor of 8 mm inner diameter. The amount of catalyst used was g. A gas mixture of % CO, % CO2, % N2, % CH4 and % H2, the.

ruthenium oxides and 85% of nickel species were found as NiO, Ni(OH) 2 and NiOOH. The cyclic voltammograms (CV) of PtSn/C and PtSnNi/C electrocatalysts in the absence of ethanol are shown in Fig.

In this case, all CV do not have a well-defined hydrogen adsorption–desorption region (0– V). The CV of PtSn/C electrocatalysts showed.

Hydrogen stores a tremendous amount of energy and so offers great potential as a sustainable, carbon-free source of power. Hydrogen is also abundant on Earth, although predominantly in the form of water.

Electrocatalysis can separate the hydrogen atoms from the oxygen atoms, but a crucial consideration is a process known as oxygen evolution. Image credit: Z.W. Seh et al., Science, The hydrogen evolution reaction (HER, 2 H + + 2 e − → H 2) is the cathodic reaction in electrochemical water HER is a classic example of a two-electron transfer reaction with one catalytic intermediate, and offers the potential to produce H 2, a critical chemical reagent and fuel.

Driving the HER with renewable sources of energy. Electrodeposited Co7Se8 nanostructures exhibiting flake-like morphology show bifunctional catalytic activity for oxygen evolution and hydrogen evolution reaction (OER and HER, respectively) in alkaline medium with long-term durability (>12 h) and high Faradaic efficiency (%).

In addition to low Tafel slope ( mV per decade), the Co7Se8 OER electrocatalyst also exhibited very low Cited by:. nickel aluminate [18], which has lower reactivity than free NiO. The knowledge of the kinetics of the reduction and oxidation reactions is essential for the design of both CLC and CLR systems.

The solids inventory necessary in the air and fuel reactors to transfer the oxygen for the reduction reactions is related to the reactivity.

How to cite this article: Yue, X. et al. Cadmium Sulfide and Nickel Synergetic Co-catalysts Supported on Graphitic Carbon Nitride for Visible-Light-Driven Photocatalytic Hydrogen Evolution. Sci.V. Narayanan et al/Int.J. ChemTech Res,6(6),pp Optical Studies Figure 3i shows the optical absorption spectrum of nickel oxide sample calcined at and ºC were measured using UV-Visible spectrophotometer in the range of to nm.