NDLI: Depleted uranium catalysts for chlorine production

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Engineering and applications of DNA-grafted polymer materials

Intriguing aspects of lanthanide luminescence

Revisiting the optical signatures of BODIPY with ab initio tools

Chelation-assisted Rh(iii)-catalyzed C2-selective oxidative C–H/C–H cross-coupling of indoles/pyrroles with heteroarenes

Ultra-sensitive chemosensors for Fe(iii) and explosives based on highly fluorescent oligofluoranthene

A dinuclear cyclometalated gold(iii)–phosphine complex targeting thioredoxin reductase inhibits hepatocellular carcinoma in vivo

Synthesis of spongistatin 2 employing a new route to the EF fragment

Scope and mechanism of asymmetric C(sp³)–H/C(Ar)–X coupling reactions: computational and experimental study

In situ preparation of a multifunctional chiral hybrid organic–inorganic catalyst for asymmetric multicomponent reactions

DNA-based asymmetric organometallic catalysis in water

Supersized contorted aromatics

“Push-no-pull” porphyrins for second harmonic generation imaging

Rapid and selective spiro-cyclisations of O-centred radicals onto aromatic acceptors

Palette of lipophilic bioconjugatable bacteriochlorins for construction of biohybrid light-harvesting architectures

Selective adsorption of ethylene over ethane and propylene over propane in the metal–organic frameworks M₂(dobdc) (M = Mg, Mn, Fe, Co, Ni, Zn)

Perfluorinated Taddol phosphoramidite as an L,Z-ligand on Rh(i) and Co(−i): evidence for bidentate coordination via metal–C₆F₅ interaction

Enhanced photocurrent generation by folding-driven H-aggregate formation

Recognition of glycosaminoglycan chemical patterns using an unbiased sensor array

RAFT dispersion polymerization in non-polar solvents: facile production of block copolymer spheres, worms and vesicles in n-alkanes

Selective affinity-based probe for oncogenic kinases suitable for live cell imaging

The role of viscosity on polymer ink transport in dip-pen nanolithography

Chiral β-iodoamines by urea-catalysed iodocyclization of trichloroacetimidates

MM quadruple bonds supported by cyanoacrylate ligands. Extending photon harvesting into the near infrared and studies of the MLCT states

Unexpected rearrangements in the synthesis of an unsymmetrical tridentate dianionic N-heterocyclic carbene

Poly(ethylene oxide)-block-polyphosphester-based paclitaxel conjugates as a platform for ultra-high paclitaxel-loaded multifunctional nanoparticles

CO₂ as a C₁-building block for the catalytic methylation of amines

¹⁹F-MRS/¹H-MRI dual-function probe for detection of β-galactosidase activity

High-intensity near-IR fluorescence in semiconducting polymer dots achieved by cascade FRET strategy

Decamethylscandocinium-hydrido-(perfluorophenyl)borate: fixation and tandem tris(perfluorophenyl)borane catalysed deoxygenative hydrosilation of carbon dioxide

Pd-catalyzed oxidative C–H/C–H cross-coupling of pyridines with heteroarenes

MegaStokes BODIPY-triazoles as environmentally sensitive turn-on fluorescent dyes

N-Heterocyclic carbene (NHC) catalyzed chemoselective acylation of alcohols in the presence of amines with various acylating reagents

Kinetics and thermodynamics of nitric oxide binding to transition metal complexes. Relationship to dioxygen binding

Anhydrides as α,β-unsaturated acyl ammonium precursors: isothiourea-promoted catalytic asymmetric annulation processes

Ruthenium-catalyzed ortho-C–H bond alkylation of aromatic amides with α,β-unsaturated ketones via bidentate-chelation assistance

Depleted uranium catalysts for chlorine production

Asymmetric Michael additions of α-cyanoacetates by soft Lewis acid/hard Brønsted acid catalysis: stereodivergency with bi- vs. monometallic catalysts

DNA functionalization of colloidal II–VI semiconductor nanowires for multiplex nanoheterostructures

Ligand-controlled β-selective C(sp³)–H arylation of N-Boc-piperidines

Efficient approach for the design of effective chiral quaternary phosphonium salts in asymmetric conjugate additions

Fast transimination in organic solvents in the absence of proton and metal catalysts. A key to imine metathesis catalyzed by primary amines under mild conditions

Total synthesis of (±)-leuconolam: intramolecular allylic silane addition to a maleimide carbonyl group

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Depleted uranium catalysts for chlorine production

Content Provider	Royal Society of Chemistry (RSC)
Author	Amrute, Amol P. Pérez-Ramírez, Javier Mondelli, Cecilia Krumeich, Frank
Copyright Year	2013
Abstract	This study demonstrates depleted uranium as a remarkable heterogeneous catalyst for the oxidation of HCl to Cl2. This reaction comprises a sustainable approach to valorise byproduct HCl streams in the chemical industry. Bulk α-U3O8 showed an outstanding stability against chlorination, which is crucial for its durability in catalytic tests. UO2 and γ-UO3 transformed into α-U3O8 under reaction conditions. Uranium deposition on different carriers by dry impregnation concluded the superiority of zirconia as support. HAADF-STEM investigations revealed that the uranium oxide on the surface of this carrier is present in the form of a film-like nanostructure with a thickness ranging from a monolayer to 1 nm as well as atomic dispersion. The effect of variables (temperature, feed O2/HCl ratio, metal loading, and Cl2 co-feeding) on the performance of U3O8/ZrO2 has been studied. The HCl conversion over this catalyst increased with reaction time as a likely consequence of in situ re-dispersion of the original uranium phase into atomically dispersed UOx. As demonstrated by H2-TPR, the uranium in the generated UOx phase is more oxidised than in the original U3O8. Such a highly dispersed active phase is produced faster in the uncalcined sample. The extraordinary stable Cl2 production over U3O8/ZrO2 at 773 K for 100 h on stream indicates its potential for application in high-temperature HCl oxidation. Under these conditions, other known catalytic materials suffer from significant deactivation.
Starting Page	2209
Ending Page	2217
Page Count	9
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	4
Issue Number	5
Journal	Chemical Science
DOI	10.1039/c3sc22067b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Heterogeneous catalysis Chemical industry Statistical dispersion Oxygen Uranium Nanostructure Zirconium dioxide Uranium oxide Depleted uranium UOX
Content Type	Text
Resource Type	Article
Subject	Chemistry

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Depleted uranium catalysts for chlorine production

Development of industrial catalysts for sustainable chlorine production.

Heterogeneous redox catalysts for oxygen and chlorine evolution

Importance, features and uses of metal oxide catalysts in heterogeneous catalysis

THE REACTION OF ZIRCONIUM WITH URANIUM DIOXIDE

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High Activity of Gold/Tin-Dioxide Catalysts for Low-Temperature CO Oxidation: Application of a Reducible Metal Oxide to a Catalyst Support

Investigation of H$_{2}$S oxidation by oxygen on oxide catalysts in sulfur condensation conditions

Hydrogen Production from Ethanol Steam Reforming Over Supported Cobalt Catalysts

Depleted uranium catalysts for chlorine production

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