Rational Design of Bimetallic Au/Cu Nanostructure: An Efficient Catalyst for Methanol Oxidation

Biswas, Rathindranath; Singh, Simranjeet; Ahmed, Imtiaz; Patil, Ranjit A.; Ma, Yuan‐Ron; Haldar, Krishna Kanta

doi:10.1002/cnma.202000578

Cited by 15 publications

(12 citation statements)

References 86 publications

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“…Development of methodologies for advancement of energy resources in sustainable fashion is highly attractive due to its ability to overcome negative outcomes brought about by the utilization of conventional fossil fuels. Consequently, an assortment of energy conversation strategies, for example, PEC water splitting, − electrocatalytic water splitting, − methanol oxidation, − N 2 reduction, − CO 2 reduction, − and rechargeable metal-air batteries, − have been paid increasingly more consideration inferable from their extraordinary potential for reducing the concern of energy needs. Among those, the electrocatalytic water oxidation reaction to produce oxygen can be regarded as a green and sustainable approach for generating alternative energy.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

et al. 2021

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Altering the morphology of electrochemically active nanostructured materials could fundamentally influence their subsequent catalytic as well as oxygen evolution reaction (OER) performance. Enhanced OER activity for mixed-metal spinel-type sulfide (CuCo2S4) nanorods is generally done by blending the material that has high conductive supports together with those having a high surface volume ratio, for example, graphitic carbon nitrides (g-C3N4). Here, we report a noble-metal-free CuCo2S4 nanorod-based electrocatalyst appropriate for basic OER and neutral media, through a simple one-step thermal decomposition approach from its molecular precursors pyrrolidine dithiocarbamate-copper(II), Cu[PDTC]2, and pyrrolidine dithiocarbamate-cobalt(II), Co[PDTC]2 complexes. Transmission electron microscopy (TEM) images as well as X-ray diffraction (XRD) patterns suggest that as-synthesized CuCo2S4 nanorods are highly crystalline in nature and are connected on the g-C3N4 support. Attenuated total reflectance–Fourier-transform infrared (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy studies affirm the successful formation of bonds that bridge (Co–N/S–C) at the interface of CuCo2S4 nanorods and g-C3N4. The kinetics of the reaction are expedited, as these bridging bonds function as an electron transport chain, empowering OER electrocatalytically under a low overpotential (242 mV) of a current density at 10 mA cm–2 under basic conditions, resulting in very high durability. Moreover, CuCo2S4/g-C3N4 composite nanorods exhibit a high catalytic activity of OER under a neutral medium at an overpotential of 406 mV and a current density of 10 mA cm–2.

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Section: Introductionmentioning

confidence: 99%

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

et al. 2021

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“…The obtained precipitates were placed in a vacuum drying oven for 36 h at 50 °C, and the vacuum degree was 0.09 MPa. The Au-CuNP powders were obtained . At the same time, we set up three groups of reactions with different ratios of raw materials (other reaction conditions are the same): (1) 0.03 g of chloroauric acid, 0.015 g of cupric chloride, 0.25 g of glucose, and 0.1 g of hexadecane; (2) 0.015 g of chloroauric acid, 0.03 g of cupric chloride, 0.25 g of glucose, and 0.1 g of hexadecane; (3) 0.03 g of chloroauric acid, 0.03 g of cupric chloride, 0.25 g of glucose, and 0.05 g of hexadecane.…”

Section: Methodsmentioning

confidence: 99%

Au–Cu Bimetallic Nanostructures for Photothermal Antibacterial and Wound Healing Promotion

Song

Liu

Zhang

et al. 2022

ACS Appl. Nano Mater.

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The spread of drug-resistant bacterial infections can lead to serious infectious diseases and pose a significant threat to public health security. Metallic-nano-antibacterial materials are gradually becoming a hot spot for antimicrobial biomaterials research with the advantages of long service life and fast effective bactericidal speed. Considering the construction of a safe and efficient photothermal therapy (PTT) antibacterial platform as a promising strategy for the treatment of bacterial infections, a near-infrared (NIR) bimetallic antibacterial nanoparticle, adenosine 5′-triphosphate (ATP)@Au-Cu nanoparticle (NP), with excellent photothermal conversion efficiency (59.3%) was prepared in this paper; ATP@Au-CuNPs with their multiarm shaped structure and NIR photothermal effect could significantly inhibit the growth of bacteria at the low concentrations. In addition, the cytotoxicity and hemolysis rate of the ATP-coated nanoparticles were reduced considerably, and they also exhibited antibacterial and wound healing-promoting effects in mice wound infection models. On this basis, this paper focuses on the preparation and properties of ATP@Au-CuNPs and explores their biological application in antibacterial therapy.

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“…Environmental degradation and energy crises due to the overburning of fossil fuels for sustainable progress are major concerns these days. , To address these issues, various technologies, such as CO 2 reduction, methanol oxidation, , rechargeable metal–air batteries, , and water electrolysis, − have been developed to date to convert and store green energies. Among them, an important oxygen evolution reaction (OER) process occurring on the anode for energy conversion systems follows the dawdling dynamics due to the involvement of 4OH – and 4e – transfer processes, which due to high overpotential reduces energy efficiency. , Therefore, there is a compelling need for electrocatalysts to accelerate this process.…”

Section: Introductionmentioning

confidence: 99%

LaCoO₃ Perovskite Nanoparticles Embedded in NiCo₂O₄ Nanoflowers as Electrocatalysts for Oxygen Evolution

Kubba

Ahmed

Kour

et al. 2022

ACS Appl. Nano Mater.

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It is essential to design high-efficiency, stable, and inexpensive electrocatalysts for the oxygen evolution reaction (OER). We fabricate a hybrid system of perovskite LaCoO 3 with spinel NiCo 2 O 4 denoted LaCoO 3 /NiCo 2 O 4 via an in situ hydrothermal process. In situ incorporation of LaCoO 3 nanoparticles on the NiCo 2 O 4 nanoflower surface is confirmed by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images. Benefiting from the interface engineering, the obtained LaCoO 3 / NiCo 2 O 4 hybrid nanoflowers exhibit the lowest overpotential of 353 at a current density of 10 mA/cm 2 and a small Tafel slope of 59 mV/dec in alkaline media compared with pristine LaCoO 3 (401 mV, 116 mV/dec) and NiCo 2 O 4 (386 mV, 73 mV/dec). The optimized sample possesses a higher electrochemical surface of 111.45 cm 2 than LaCoO 3 perovskite (35.37 cm 2 ) and NiCo 2 O 4 spinel oxide (61.37 cm 2 ) structures. The enhanced OER performance of the LaCoO 3 /NiCo 2 O 4 composite structure is due to the accumulation of LaCoO 3 nanoparticles over NiCo 2 O 4 petals, which introduces a substantial number of electrochemically active sites for the catalysis process to promote charge and mass transport. In addition to this, LaCoO 3 / NiCo 2 O 4 exhibits long-term stability over 20 h. Thus, it is believed that the excellent OER activity of the LaCoO 3 /NiCo 2 O 4 composite structure is associated with strong interaction between LaCoO 3 and NiCo 2 O 4 as well as a large surface area and a unique flower structure.

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Rational Design of Bimetallic Au/Cu Nanostructure: An Efficient Catalyst for Methanol Oxidation

Cited by 15 publications

References 86 publications

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

Au–Cu Bimetallic Nanostructures for Photothermal Antibacterial and Wound Healing Promotion

LaCoO₃ Perovskite Nanoparticles Embedded in NiCo₂O₄ Nanoflowers as Electrocatalysts for Oxygen Evolution

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Rational Design of Bimetallic Au/Cu Nanostructure: An Efficient Catalyst for Methanol Oxidation

Cited by 15 publications

References 86 publications

Interfacial Engineering of CuCo2S4/g-C3N4 Hybrid Nanorods for Efficient Oxygen Evolution Reaction

Interfacial Engineering of CuCo2S4/g-C3N4 Hybrid Nanorods for Efficient Oxygen Evolution Reaction

Au–Cu Bimetallic Nanostructures for Photothermal Antibacterial and Wound Healing Promotion

LaCoO3 Perovskite Nanoparticles Embedded in NiCo2O4 Nanoflowers as Electrocatalysts for Oxygen Evolution

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Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

Interfacial Engineering of CuCo₂S₄/g-C₃N₄ Hybrid Nanorods for Efficient Oxygen Evolution Reaction

LaCoO₃ Perovskite Nanoparticles Embedded in NiCo₂O₄ Nanoflowers as Electrocatalysts for Oxygen Evolution