Synthesis of CuO and Cu<sub>2</sub>O nano/microparticles from a single precursor: effect of temperature on CuO/Cu<sub>2</sub>O formation and morphology dependent nitroarene reduction

Kumar, V. Vinod; Dharani, A. P.; Mariappan, Mariappan; Anthony, Savarimuthu Philip

doi:10.1039/c6ra16553b

Cited by 34 publications

(7 citation statements)

References 51 publications

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“…The preferential formation of Cu 2 O is currently not clear. It might be that the phenolic chelating ligand is a weak reducing agent converting CuO into Cu 2 O …”

Section: Resultsmentioning

confidence: 99%

Solution Processable Cu(II)macrocycle for the Formation of Cu₂O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

et al. 2018

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The development of efficient water oxidation catalytic interfaces has become a demanding challenge to fulfill the promise of water splitting for clean energy conversion and storage. The present work reports on the use of a Cu 2+ -macrocycle, formed by the interaction of copper perchlorate hexahydrate with ethylenediamine and 1,4-bis(2-carboxyaldehyde phenoxy)butane, as precursors for the oxygen evolution reaction (OER) on anode. In alkaline solution, using potassium borate electrolyte (pH 12.0) as electrolyte, the catalytic onset potential was less than 0.80 V, reflecting an overpotential of 524 mV for a catalytic current density of 1 mA cm −2 . The OER activity was much higher when compared to Cu 2+ (e.g., Cu(OAc) 2 ), which converts under these conditions into OER inactive Cu(OH) 2 precipitate in solution. The interest of this complex is that it can be used as homogeneous OER catalyst but can be in addition electrochemically deposited on electrode materials, where it maintained its robust electrocatalytic activity for the OER. Surface-supported thin catalytic film was grown on glassy carbon and indium tin oxide (ITO) electrodes upon the application of a potential of 1.1 V for 5 h. X-ray diffraction (XRD) as well as X-ray photoelectron spectroscopy (XPS) indicate the preferential formation of Cu 2 O. Remarkably, under applied anodic potential of 1.1 V vs SCE, the ITO/Cu 2 O anode efficiently catalyze water oxidation by evolving oxygen. The overpotential was determined as 400 mV vs NHE at 1 mA cm −2 . This anode maintained a current density of about 5.1 mA cm −2 for 5 h with a recession of about 11%. In addition, the same ITO/Cu 2 O anode could be used for several OER experiments without loss of activity.

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“…The preferential formation of Cu 2 O is currently not clear. It might be that the phenolic chelating ligand is a weak reducing agent converting CuO into Cu 2 O …”

Section: Resultsmentioning

confidence: 99%

Solution Processable Cu(II)macrocycle for the Formation of Cu₂O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

et al. 2018

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“…In the same year, also S. P. Anthony and co-workers investigated Cu 2 O and CuO for the reduction of nitroarenes . By hydrothermal heating of Cu(OAc) 2 , CuO was produced at 125 °C, Cu 2 O at 175 °C, and a mixture of both at 150 °C.…”

Section: Heterogeneous Copper-based Catalystsmentioning

confidence: 99%

“…FE-SEM images of (a–c) CuO and (d–f) Cu 2 O, produced by hydrothermal heating of Cu(OAc) 2 at 125 and 175 °C, respectively. Reproduced with permission from ref . Copyright 2016 The Royal Society of Chemistry.…”

Section: Heterogeneous Copper-based Catalystsmentioning

confidence: 99%

Reduction of Nitro Compounds Using 3d-Non-Noble Metal Catalysts

et al. 2018

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The reduction of nitro compounds to the corresponding amines is one of the most utilized catalytic processes in the fine and bulk chemical industry. The latest development of catalysts with cheap metals like Fe, Co, Ni and Cu has led to their tremendous achievements over the last years prompting to their greater application as "standard" catalysts. In this review we will comprehensively discuss the use of homogeneous and heterogeneous catalysts based on non-noble 3d-metals for the reduction of nitro compounds using various reductants. The different systems will be revised considering both the catalytic performances and synthetic aspects highlighting also their advantages and disadvantages.

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“…Obviously, Cu(Ac) 2 ·H 2 O as a metal salt can form a composite catalyst for CuO/Cu 2 O-r Ac during the in situ reduction process, indicating that the phase generation can be determined by the anions of the copper sources. 25…”

Section: Resultsmentioning

confidence: 99%

Self-driven in situ facile synthesis of CuO/Cu₂O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

Zhu

Wang

et al. 2022

New J. Chem.

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Synthesis of CuO and Cu₂O nano/microparticles from a single precursor: effect of temperature on CuO/Cu₂O formation and morphology dependent nitroarene reduction

Abstract: CuO and Cu2O micro/nanoparticles have been synthesized from same precursor in hydrothermal method by controlling temperature and morphology dependent nitroarenes reduction was studied with CuO nano/microparticles.

Cited by 34 publications

References 51 publications

Solution Processable Cu(II)macrocycle for the Formation of Cu₂O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

Solution Processable Cu(II)macrocycle for the Formation of Cu₂O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

Reduction of Nitro Compounds Using 3d-Non-Noble Metal Catalysts

Self-driven in situ facile synthesis of CuO/Cu₂O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

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Synthesis of CuO and Cu2O nano/microparticles from a single precursor: effect of temperature on CuO/Cu2O formation and morphology dependent nitroarene reduction

Abstract: CuO and Cu2O micro/nanoparticles have been synthesized from same precursor in hydrothermal method by controlling temperature and morphology dependent nitroarenes reduction was studied with CuO nano/microparticles.

Cited by 34 publications

References 51 publications

Solution Processable Cu(II)macrocycle for the Formation of Cu2O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

Solution Processable Cu(II)macrocycle for the Formation of Cu2O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

Reduction of Nitro Compounds Using 3d-Non-Noble Metal Catalysts

Self-driven in situ facile synthesis of CuO/Cu2O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

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Synthesis of CuO and Cu₂O nano/microparticles from a single precursor: effect of temperature on CuO/Cu₂O formation and morphology dependent nitroarene reduction

Solution Processable Cu(II)macrocycle for the Formation of Cu₂O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

Solution Processable Cu(II)macrocycle for the Formation of Cu₂O Thin Film on Indium Tin Oxide and Its Application for Water Oxidation

Self-driven in situ facile synthesis of CuO/Cu₂O for enhanced catalytic reduction of 4-nitrophenol by acetic acid