Co-Ni Bimetallic Catalysts Coated on Cordierite Monoliths for Hydrazine Decomposition

Pakdehi, Shahram Ghanbari; Salimi, Mozaffar; Rasoolzadeh, Maryam

doi:10.4028/www.scientific.net/amr.936.981

Cited by 9 publications

(9 citation statements)

References 7 publications

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“…These results are in accordance with the mechanism proposed by J. Bodiguel et al . Interestingly, the release of diazene can also explain the formation of amide (one of the final non‐active compounds) since its decomposition generates later ammonia, which can react with isonicotinoyl radical to yield isonicotinamide. In addition, pathway a can also account for the formation of isonicotinaldehyde metabolite.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, oxidation potential and anti-mycobacterial activity of isoniazid and analogues: insights into the molecular isoniazid activation mechanism

et al. 2016

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Tuberculosis (TB) is one of the leading causes of death due to infectious diseases. Among the specific drugs currently employed to treat tuberculosis, isoniazid (INH), a pro-drug, attracts a great interest. However, Mycobacterium tuberculosis (MTB) clinical isolates resistant to INH are significantly increasing thus compromising the efficiency of TB-treatment. Concerning the mechanism of resistance to INH, it is nowadays well established that it mainly results from mutations in the katG genes encoding for INH enzymatic activator. Recently, it was proposed that mutation in katG induces differences in heme or side chain redox potential so that the enzyme loses its ability to oxidize INH to radical species. In this work, we synthesized and selected a series of INH analogues for a study of their oxidation potential and evaluation of their anti-TB efficiency toward MTB wild-type and drug resistant strains. On the contrary to what was postulated, no correlation exists between the easier oxidation of a molecule and its anti-MTB activity toward resistant strains. Based on experimental data and theoretical calculations, we proposed an activation mechanism for INH and analogues based on a one-electron oxidation step of the hydrazyl function at the proximal nitrogen followed by a radical transposition to the distal nitrogen, which then induces a b-homolytic cleavage of the C(= O)-N bond to afford diazene and the isonicotinoyl radical species.

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Section: Resultsmentioning

confidence: 99%

Synthesis, oxidation potential and anti-mycobacterial activity of isoniazid and analogues: insights into the molecular isoniazid activation mechanism

et al. 2016

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“…Ge 3 N 4 nanowires were growing on the surface of Ge source, while InP NWs were formed on the Si substrate, located at 2 cm above the source. At elevated temperatures the Ge and InP surfaces served as catalysts and N 2 H 4 was decomposed through the fast chain reactions, forming active transient nitrogen precursors (NH 2 , NH, N) until finally the stabile N 2 , NH 3 and H 2 molecules were formed [13][14][15] . The Mc Bain quartz spiral microbalance was used for the analysis of the interaction of Ge source with hydrazine that was containing different amount of water.…”

Section: Methodsmentioning

confidence: 99%

Influence of Water on the Growth Process of Ge3N4 and InP Nanowires

Jishiashvili¹,

Shiolashvili²,

Makhatadze³

et al. 2017

Orient. J. Chem

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The germanium nitride and InP nanowires were grown using the pyrolytic decomposition products of hydrazine (N 2 H 4 ), which was containing 3 mol.% H 2 O. In a separate set of experiments the quartz microbalance was used to study the interaction of water containing hydrazine with Ge sample in the temperature range of 450-650°C. It was established that up to 500°C only water molecules interact with Ge, forming volatile suboxide GeO. At higher temperatures GeO molecules and nitrogen precursors, produced after decomposition of hydrazine, form crystalline Ge 3 N 4 nanowires on the Ge surface. Analysis of thermo-chemical reactions reveal that in the presence of water molecules and nitrogen precursors the formation of nitride is thermodynamically favourable than the synthesis of germanium dioxide. When InP was annealed in hydrazine at 440°C the water molecules were producing volatile In 2 O. After reaching the Si substrate these molecules were interacting with phosphorus vapor, producing InP nanowires.

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“…Nevertheless, borohydride hydrolysis as hydrogen generation process occurs on the ground of the reaction (3), however, in the case of hydrazine, hydrogen production is known to proceed via decomposition of the latter by two routes with the formation of different products as noted below [11]:…”

Section: Introductionmentioning

confidence: 99%

Investigation of sodium borohydride and hydrazine oxidation on gold nanoparticles modified zinc–cobalt coating

Zabielaitė¹,

Balčiūnaitė²,

Šimkūnaitė³

et al. 2019

chemija

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This work presents the investigation of the electrochemical oxidation of hydrazine and sodium borohydride ions in alkaline solutions on the Au nanoparticles modified ZnCo coating surface, which was deposited on the titanium substrate (termed as AuZnCo/Ti). The AuZnCo/Ti catalysts were prepared via a facile electrochemical deposition technique followed by a simple and low-cost galvanic displacement. Scanning electron microscopy, energy dispersive X-ray analysis and inductively coupled plasma optical emission spectroscopy were used for characterization of the prepared catalysts surface morphology, structure and composition, whereas their electrocatalytic behaviour was investigated for the electrochemical oxidation of hydrazine and sodium borohydride in an alkaline medium using cyclic voltammetry. It has been determined that the AuZnCo/Ti catalysts with Au loadings of 31, 63 and 306 µg cm–2 show enhanced catalytic activity towards the electrochemical oxidation of both hydrazine and sodium borohydride as compared to that of the ZnCo/Ti catalyst.

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Co-Ni Bimetallic Catalysts Coated on Cordierite Monoliths for Hydrazine Decomposition

Cited by 9 publications

References 7 publications

Synthesis, oxidation potential and anti-mycobacterial activity of isoniazid and analogues: insights into the molecular isoniazid activation mechanism

Synthesis, oxidation potential and anti-mycobacterial activity of isoniazid and analogues: insights into the molecular isoniazid activation mechanism

Influence of Water on the Growth Process of Ge3N4 and InP Nanowires

Investigation of sodium borohydride and hydrazine oxidation on gold nanoparticles modified zinc–cobalt coating

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