Nitrato and nitro complexes of nitrosylruthenium

Fletcher, J. M.; Jenkins, Iredell; Lever, F. M.; Martin, F.S.; Powell, A. R.; Todd, Robert

doi:10.1016/0022-1902(55)80048-6

Cited by 158 publications

(31 citation statements)

References 7 publications

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“…For Pt(NH 3 ) 4 2+ , no indication was found in the literature that hydrolysis or polymerization of the precursor can occur, so probably this precursor retains its 2+ charge irrespective of the pH and needs as a consequence two neighboring adsorption sites as is often reported for oxidic supports. 2,43 Although the average active site density on CNF is relatively low, i.e., ∼1.4 sites/nm 2 , due to their presumable 47 For RuCNF, a Ru/acid site ratio of ca. 1.2 can be calculated, whose ratio is close to the ratio expected for one-to-one adsorption.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Carbon Nanofiber Supported Platinum and Ruthenium Catalysts: Comparison of Ion Adsorption and Homogeneous Deposition Precipitation

et al. 2004

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Carbon nanofiber (CNF) supported platinum catalysts have been prepared using Pt(NH 3 ) 4 (NO 3 ) 2 as a precursor by two different ion adsorption techniques, one at a constant pH and one in which the pH is gradually and homogeneously increased from 3 to 6 by hydrolysis of urea. The latter method resembles the procedure of homogeneous deposition precipitation (HDP). Characterization of the CNF support was performed by acidbase titration, thermogravimetric mass spectrometry, and X-ray photoelectron spectroscopy, and for the various platinum catalysts, transmission electron microscopy, H 2 -chemisorption, and X-ray fluorescence/inductively coupled plasma-atomic emission spectrometry were utilized. With both synthesis techniques from diluted precursor solutions homogeneously distributed, highly dispersed and thermally stable metal particles were obtained with an average particle size of 1-2 nm. With the HDP method for the Pt/CNF catalysts, a linear relationship between the number of acidic oxygen-containing groups on the surface of activated CNF and the metal loading has been found. For the highest loaded catalyst, a platinum/adsorption site ratio of 0.5 was established, corresponding to about 0.7 Pt(NH 3 ) 4 2+ molecules/nm 2 . Furthermore, it has been established that with this procedure higher platinum loadings (∼4 wt %) can be achieved than with the ion adsorption procedure (<2 wt %). The HDP method using RuNO(NO 3 ) 3 (H 2 O) 2 also turned out to be suitable for the preparation of small (1-2 nm) uniform ruthenium particles on CNF with a high thermostability.

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Section: Resultsmentioning

confidence: 99%

Preparation of Carbon Nanofiber Supported Platinum and Ruthenium Catalysts: Comparison of Ion Adsorption and Homogeneous Deposition Precipitation

et al. 2004

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“…Ru(NO)(NO 3 ) 3 in 1 M HNO 3 exist predominantly as a neutral species [10,22], therefore, extraction with the ligand 1, L + I − , follows adduct formation mechanism as indicated in Eq. (1).…”

Section: Mechanism Of Extractionmentioning

confidence: 99%

Dialkylmethyl-2-(N,N-diisobutyl)acetamidoammonium iodide as a ruthenium selective ligand from nitric acid medium

Sharma

Ghosh

Sharma

2015

Journal of Hazardous Materials

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“…Since radioruthenium became available, the chemist has been in a better position to investigate the various complex reactions of ruthenium but the results of many experimental studies made using radiotracers remain open to doubt because of isotopic exchange difficulties. In the reprocessing of nuclear fuel, nitrosyl complexes of radioruthenium are formed and, being in many cases extremely stable, persist in the marine environment long after discharge in lowlevel aqueous wastes (Fletcher et al, 1955;Wyatt and Rickard, 1961). As Jones (1960) has shown using 106 Ru and strip chromatography techniques, the behaviour of nitrosyl ruthenium and nuclear plant wastes containing radioruthenium is unpredictable and shows ageing effects for long periods of time.…”

Section: Iodine Ruthenium and Technetiummentioning

confidence: 99%