Phytochemical-Assisted Green Synthesis of Nickel Oxide Nanoparticles for Application as Electrocatalysts in Oxygen Evolution Reaction

Review Chemistry, Multidisciplinary

Green synthesis of nanoparticles using plant extracts: a review

Sapana Jadoun et al.

Summary: Green synthesis of nanoparticles has potential applications in reducing the usage of toxic chemicals, with the use of plants as materials usually being safe and containing reducing and capping agents.

ENVIRONMENTAL CHEMISTRY LETTERS (2021)

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Article Materials Science, Ceramics

Diluted chemical bath deposition of CdZnS as prospective buffer layer in CIGS solar cell

F. T. Munna et al.

Summary: In this study, CdZnS thin films were deposited on soda-lime glass substrates using dilute chemical bath deposition technique. The research investigated the structural, morphological, and optoelectronic properties of the films as a function of different Zn2+ precursor concentrations. The results showed that the optical transparency of the film is influenced by Zn2+ concentration and the bandgap values varied from 2.42 eV to 3.90 eV with different Zn2+ concentrations. Moreover, the electrical properties indicated an increase in film resistivity with higher zinc concentrations.

CERAMICS INTERNATIONAL (2021)

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Article Electrochemistry

Metal oxides supported cobalt nanoparticles: Active electrocatalysts for oxygen evolution reaction

Merve Akbayrak et al.

Summary: This study synthesizes Co/MO2 (M = Ti, Zr, and Ce) catalysts using a simple method and demonstrates their remarkable electrocatalytic performance in alkaline medium. The stability test shows that the catalysts maintain stable performance even after continuous testing. This work provides insights into the preparation of inexpensive, earth-abundant, and highly active OER electrocatalysts by changing impregnated metals or metal oxides supports.

ELECTROCHIMICA ACTA (2021)

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Article Chemistry, Physical

Three-dimensional petal-like graphene Co3.0Cu1.0 metal organic framework for oxygen evolution reaction

Haoye Wang et al.

Summary: This work presents a 3D graphene sponge-based CoCu bimetallic active center organic framework with excellent electrocatalytic performance for oxygen evolution reaction. A series of electrochemical experiments demonstrated its superior catalytic activity and stability over 20000 s test.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Green & Sustainable Science & Technology

Green Synthesis and Characterization of CuO Nanoparticles Derived from Papaya Peel Extract for the Photocatalytic Degradation of Palm Oil Mill Effluent (POME)

You-Kang Phang et al.

Summary: In this study, copper oxide nanoparticles were successfully synthesized using papaya peel biowaste as reducing and stabilizing agents, showing promising photocatalytic activity for degrading palm oil mill effluent. Analysis of the nanoparticles' properties confirmed their potential for photodegradation and reduction of toxicity.

SUSTAINABILITY (2021)

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Article Chemistry, Multidisciplinary

Stable and Highly Efficient Hydrogen Evolution from Seawater Enabled by an Unsaturated Nickel Surface Nitride

Huanyu Jin et al.

Summary: A novel unsaturated nickel surface nitride catalyst has been developed for efficient and stable hydrogen electrocatalytic production in alkaline seawater. The catalyst shows lower overpotential compared to traditional metal nitrides and can effectively generate hydronium ions in high-pH electrolyte.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical

Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

Vidhya Selvanathan et al.

Summary: In this study, copper oxide nanoparticles (CuO NPs) with unique morphology were synthesized using phytochemical assisted method. The CuO NPs were found to have a distinct nanorods structure formed with the assistance of secondary metabolites in the plant extract. Characterization techniques such as SEM, TEM, FTIR, XRD, XPS, and Raman spectroscopy confirmed the purity and structure of the CuO NPs with specific optical band gap energies recorded.

MATERIALS (2021)

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Article Chemistry, Physical

Bioinspired synthesis of nickel oxide nanoparticles as electrode material for supercapacitor applications

Priyanka Lamba et al.

Summary: Nickel oxide nanoparticles were synthesized using a green route and a nontoxic phytoextract of guava leaves. Characterization using various techniques showed the biosynthesized NiO nanoparticles exhibit high specific capacitance when used as supercapacitor electrodes.

IONICS (2021)

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Article Materials Science, Multidisciplinary

Hollow Nanosheet Arrays Assembled by Ultrafine Ruthenium-Cobalt Phosphide Nanocrystals for Exceptional pH-Universal Hydrogen Evolution

Cheng Wang et al.

Summary: This study presents a facile approach for synthesizing Ru-CoxP nanoarrays with outstanding electrocatalytic performance towards pH-universal hydrogen evolution reaction (HER), potentially promising for constructing feasible water splitting systems. The synergic effects of optimized electronic structure, increased active sites, and rapid charge/mass transfer contribute to the excellent catalytic activity of Ru-CoxP nanoarrays.

ACS MATERIALS LETTERS (2021)

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Article Energy & Fuels

Oxygen evolution reaction (OER) mechanism under alkaline and acidic conditions

Qiuhua Liang et al.

Summary: Density functional theory (DFT) simulations of the oxygen evolution reaction (OER) are important for understanding the limitations of water splitting, but the differences between experimental conditions under alkaline and calculations under acidic environments require a pH-dependent correction factor. This paper derives a theory to simulate the OER based on the alkaline reaction mechanism and compares mechanisms for alkaline and acidic OER catalysis, explaining the differences between experimental and calculated results.

JOURNAL OF PHYSICS-ENERGY (2021)

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Article Nanoscience & Nanotechnology