Effect of Antimony on the Chemical–Physical Features and Reactivity in Isobutyric Acid Oxidehydrogenation of Keggin-Type Heteropolycompounds

Cavani, Fabrizio; Tanguy, A.; Trifirò, Ferruccio; Koutrev, M.

doi:10.1006/jcat.1998.1983

Cited by 34 publications

(12 citation statements)

References 43 publications

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“…An electron relay mechanism would require Sb(III) to act as a reductant before being subsequently reduced by ascorbic acid; Sb(III) is capable of reducing 12-MPA directly but only at high temperatures [81,107,108], and no reaction is observed under the conditions expected for the MB reaction [106]. This suggests, therefore, that Sb(III) does not act as an electron relay.…”

Section: Sncl2mentioning

confidence: 81%

The molybdenum blue reaction for the determination of orthophosphate revisited: Opening the black box

Nagul

McKelvie

Worsfold

et al. 2015

Analytica Chimica Acta

321

247

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The molybdenum blue reaction, used predominantly for the determination of orthophosphate in environmental waters, has been perpetually modified and re-optimised over the years, but this important reaction in analytical chemistry is usually treated as something of a 'black box' in the analytical literature. A large number of papers describe a wide variety of reaction conditions and apparently different products (as determined by UV-visible spectroscopy) but a discussion of the chemistry underlying this behaviour is often addressed superficially or not at all. This review aims to rationalise the findings of the many 'optimised' molybdenum blue methods in the literature, mainly for environmental waters, in terms of the underlying polyoxometallate chemistry and offers suggestions for the further enhancement of this time-honoured analytical reaction.

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Section: Sncl2mentioning

confidence: 81%

The molybdenum blue reaction for the determination of orthophosphate revisited: Opening the black box

Nagul

McKelvie

Worsfold

et al. 2015

Analytica Chimica Acta

321

247

View full text Add to dashboard Cite

show abstract

“…Another possibility is to prepare compounds having cations that can exchange electrons with Mo VI in the anion. It has been found, for example, that the presence of Sb III in the compound makes reduction of Mo VI in the Keggin anion possible even under oxidizing conditions at 350–400 °C (i.e., in the presence of air or reaction mixtures at hydrocarbon‐lean conditions) 33j. 36f The reduced POM that develops is stabilized towards re‐oxidation, and this makes it possible to maintain the partially reduced state even under isobutane‐lean, oxidizing conditions.…”

Section: How Economics Drove Sustainability: the Gas‐phase Oxidatimentioning

confidence: 99%

Sustainability in Catalytic Oxidation: An Alternative Approach or a Structural Evolution?

2009

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This Review documents some examples of recent innovations in the field of catalytic selective oxidation from an industrial point of view. The use of alkanes as building blocks for the synthesis of bulk chemicals and intermediates is discussed, along with the main properties that catalysts should possess in order to efficiently catalyse the selective oxidation of these hydrocarbons. The currently developed processes for propene oxide and new processes under investigation for the synthesis of adipic acid are also described, highlighting innovative aspects for a better sustainability of the chemical industry.

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“…The RSD value of measured cathodic peak currents was 3%. decreased the peak currents of adsorbed polyoxometalates based on the following process [61,62].…”

Section: Phmentioning

confidence: 99%

Modification of Glassy Carbon Electrode With Single‐Walled Carbon Nanotubes and α‐Silicomolybdate: Application to Sb(III) Detection

et al. 2008

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A simple procedure was developed to prepare a glassy carbon (GC) electrode modified with single-walled carbon nanotubes (SWCNTs) 4À and CNTs. In this research the attractive mechanical and electrical characteristics of CNTs and unique properties and reactivity of polyoxometalates were combined. The modified electrode in buffer solution containing Sb(III) shows a new redox system at 0.38 V in pH 1. The voltammetric peak current increased with increasing Sb(III) concentration. The differential pulse voltammetry (DPV) technique was used for detection micromolar concentration of antimony. Furthermore, the interference effects various electroactive compounds on voltammetric response of Sb(III) were negligible. Finally the ability of the modified electrode for antimony detection in real samples was evaluated.

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Effect of Antimony on the Chemical–Physical Features and Reactivity in Isobutyric Acid Oxidehydrogenation of Keggin-Type Heteropolycompounds

Cited by 34 publications

References 43 publications

The molybdenum blue reaction for the determination of orthophosphate revisited: Opening the black box

The molybdenum blue reaction for the determination of orthophosphate revisited: Opening the black box

Sustainability in Catalytic Oxidation: An Alternative Approach or a Structural Evolution?

Modification of Glassy Carbon Electrode With Single‐Walled Carbon Nanotubes and α‐Silicomolybdate: Application to Sb(III) Detection

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