Highly reduced molybdophosphate as a noble-metal-free catalyst for the reduction of chromium using formic acid as a reducing agent

Gong, Kaining; Wang, Weijie; Yan, Jinshuang; Han, Zhangang

doi:10.1039/c4ta06830k

Cited by 77 publications

(44 citation statements)

References 35 publications

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“…Huang et al (2012) reported about the catalytic reduction of Cr(VI) using Pd nanoparticle immobilized electrospun fiber. Other catalysts systems are: nanostructured polyamic acid (Omole et al 2011), goethite (Kim et al 2007), silica (Gienada et al 2016), Fe 0 (Alowitz and Scherer 2002), CCTCCAB 91095 (Song et al 2009), molyptic phosphate (Gong et al 2015), ATCC 33456 (Shen and Wang 1995) and Pd-supported aminoclay (AC) (Celebi et al 2016). After thorough literature survey, we could not find any report based on the AC-Ni catalyzed reduction of Cr(VI).…”

Section: Introductionmentioning

confidence: 96%

Catalytic activity of Ni complexed aminoclay towards the reduction of Cr(V), p-nitrophenol and fluorescein dye

Ranchani

Parthasarathy

Devi³

et al. 2017

Appl Nanosci

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A green-colored Ni-complexed aminoclay (AC) was synthesized and its size and crystalline nature were confirmed by HRTEM images and XRD, respectively. The AC-Ni system was used as a catalyst towards the reduction of environmental pollutants like Cr(VI), fluorescein (Fluor) and nitrophenol (NiP) individually and also their mixture. The catalytic reduction of Cr(VI) was elaborately studied under different experimental conditions. The thermodynamic parameters were determined. The AC-Ni system exhibited lower energy of activation (E a ) value. The apparent rate constant of individual components and their mixture was determined, analyzed and compared with the literature reports. The pollutants present in the mixture exhibited the lower k app value due to the complex formation.

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Section: Introductionmentioning

confidence: 96%

Catalytic activity of Ni complexed aminoclay towards the reduction of Cr(V), p-nitrophenol and fluorescein dye

Ranchani

Parthasarathy

Devi³

et al. 2017

Appl Nanosci

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“…Thus, the removal of Cr VI is one of the foremost goal for environmental protection by either adsorption or reduction processes . The reduction of Cr VI to Cr III by formic acid is considered as one of the best and simplest techniques, especially in the presence of various metal nanoparticles (in particular, Pd‐based materials), as no extra pollution results in from the byproducts by following this protocol …”

Section: Resultsmentioning

confidence: 99%

Metal Bromide Controlled Interfacial Aromatization Reaction for Shape‐Selective Synthesis of Palladium Nanostructures with Efficient Catalytic Performances

Dutta

Ray

Roy

et al. 2016

Chemistry A European J

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Herein, the effect of diverse metal bromides for the shape evolution of palladium nanostructures (Pd NS) has been demonstrated. Aromaticity-driven reduction of bromopalladate(II) is optimized to reproducibly obtain different Pd NS at the water/organic layer interface. In this soft interfacial strategy, a redox potential driven reaction has been performed, forming the thermodynamically more stable (>10(4) -fold) PdBr4 (2-) precursor from PdCl4 (2-) by adding extra metal bromides. In the process, the reductant, Hantzsch dihydropyridine ester (DHPE), is aromatized. Interestingly, alkali metal bromides devoid of coordination propensity exclusively evolve Pd nanowires (Pd NWs), whereas in the case of transition metal bromides the metal ions engage the 'N' donor of DHPE at the interface, making the redox reaction sluggish. Hence, controlled Pd nanoparticles growth is observed, which evolves Pd broccolis (Pd NBRs) and Pd nanorods (Pd NRs) at the interface in the presence of NiBr2 and CuBr2 , respectively, in the aqueous solution. Thus, the effect of diverse metal bromides in the reaction mixture for tailor-made growth of the various Pd NS is reported. Among the as-synthesized materials, the Pd NWs stand to be superior catalysts and their efficiency is almost 6 and 2.5 times higher than commercial 20 % Pd/C in the electrooxidation of ethanol and Cr(VI) reduction reaction by formic acid, respectively.

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“…We also compared the catalytic activities of the Co-containing hybrids {Co[P 4 O (7) (mbpy = 5,5Ј-dimethyl-2,2Ј-dipyridyl). [28] These compounds have similar components to that of hybrids 1-3. However, they show different catalytic performance for the reduction reaction.…”

Section: Catalytic Experimentsmentioning

confidence: 89%

“…Our recent study has shown that the reduced POMs represent a kind of noble metal-free catalyst for this system. [28,29] This paper describes the redox behaviours of hybrids 1-3 and their catalytic performance for the reduction of chromium(VI) in aqueous solutions using FA under a mild condition. 6 } polyhedra link each other in a manner of corner-and edge-sharing modes ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Reduced Phosphomolybdates as Molecular Catalysts for Hexavalent Chromium Reduction

et al. 2015

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Highly reduced molybdophosphate as a noble-metal-free catalyst for the reduction of chromium using formic acid as a reducing agent

Abstract: Cobalt-containing polyoxometalates exhibit catalytic performance for toxic chromium(vi) reduction using formic acid under mild conditions.

Cited by 77 publications

References 35 publications

Catalytic activity of Ni complexed aminoclay towards the reduction of Cr(V), p-nitrophenol and fluorescein dye

Catalytic activity of Ni complexed aminoclay towards the reduction of Cr(V), p-nitrophenol and fluorescein dye

Metal Bromide Controlled Interfacial Aromatization Reaction for Shape‐Selective Synthesis of Palladium Nanostructures with Efficient Catalytic Performances

Reduced Phosphomolybdates as Molecular Catalysts for Hexavalent Chromium Reduction

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