Chemically prepared Polypyrrole/ZnWO4 nanocomposite electrodes for electrocatalytic water splitting

Brijesh, K.; Bindu, K; Shanbhag, Dhanush; Nagaraja, H.S.

doi:10.1016/j.ijhydene.2018.11.022

Cited by 46 publications

(10 citation statements)

References 64 publications

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“…The diameter corresponds to charge transfer resistance ( R ct ) between the electrode and electrolyte. The intersection of the incomplete semicircle in the high-frequency zone on the real axis produces solution resistance ( R s ). , The impedance data for different electrodes were analyzed and fitted with ZSimpWin 3.21 software using the circuit given in the inset of Figure f. As seen in Figure f, the solution (electrolyte) resistance ( R s ) is ca.…”

Section: Resultsmentioning

confidence: 99%

Facile Polypyrrole/NASICON (PPy/Na₃Fe₂(SO₄)₂(PO₄)) Electrode Materials for the Hydrogen Evolution Reaction

Kumar

Jana

et al. 2022

Energy Fuels

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The synergistic effect of low-cost, noble metal-free, environmentally friendly, and highly electrochemically active electrocatalysts is often used for the hydrogen evolution reaction (HER). Herein, nanocomposites of polypyrrole (PPy) and NASICON-structured Na 3 Fe 2 (SO 4 ) 2 (PO 4 ) (NFS) for an efficient HER have been synthesized by simple chemical oxidative polymerization. The PPy/NFS-5% (optimized ratio) nanocomposite exhibits excellent HER activity in a highly acidic medium, having a considerably low onset overpotential of −26 mV along with a Tafel slope of 101 mV dec −1 and a comparatively low overpotential of −206 mV corresponding to a current density of 10 mA/cm 2 . The as-synthesized PPy/NFS-5% nanocomposite also offers long-term stability and excellent durability. The superior electrocatalytic activity of PPy/NFS-5% nanocomposite results from the synergism between the conductivity of the PPy matrix and the hydrophilicity of NFS, providing an abundant electrocatalytic active site. The as-synthesized PPy/NFS-5% nanocomposite may find potential in real-world hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Facile Polypyrrole/NASICON (PPy/Na₃Fe₂(SO₄)₂(PO₄)) Electrode Materials for the Hydrogen Evolution Reaction

Kumar

Jana

et al. 2022

Energy Fuels

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“…From the results it can be concluded that Zn incorporation modified the HER electrocatalysis, explaining that all Zn-substituted materials have better activity compared to their unsubstituted counterpart. To compare the results obtained in this work, the HER performances of previous studies have been tabulated in Table S3 [18,20,[49][50][51][52][53][54][55].…”

Section: Electrocatalytic Hydrogen Evolutionmentioning

confidence: 99%

Tuning Electrochemical Hydrogen-Evolution Activity of CoMoO4 through Zn Incorporation

et al. 2023

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Designing cheap, efficient, and durable electrocatalysts on three-dimensional (3D) substrates such as nickel foam (NF) for the hydrogen-evolution reaction (HER) is in high demand for the practical application of electrochemical water splitting. In this work, we adopted a simple one-step hydrothermal method to realize the incorporation of Zn into the lattice of CoMoO4 with various atomic concentrations—Co1-xZnxMoO4 (x = 0, 0.1, 0.3, 0.5, and 0.7). The morphological studies demonstrated that parent CoMoO4 consists of nanoflowers and nanorods. However, as the concentration of Zn increases within the host CoMoO4, the portion of nanoflowers decreases and simultaneously the portion of nanorods increases. Moreover, the substitution of Zn2+ in place of Co2+/Co3+ creates oxygen vacancies in the host structure, especially in the case of Co0.5Zn0.5MoO4, giving rise to lower charge-transfer resistance and a higher electrochemically active surface area. Therefore, among the prepared samples, Co0.5Zn0.5MoO4 on NF showed an improved HER performance, reaching 10 mA cm−2 at an overpotential as low as 204 mV in a 1.0 M KOH medium. Finally, the Co0.5Zn0.5MoO4 electrode exhibited robust long-term stability at an applied current density of 10 mA cm−2 for 20 h. The Faradaic efficiency determined by a gas chromatograph found that the hydrogen-production efficiency varied from 94% to 84%.

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“…Another important conductive polymer is represented by polypyrrole (PPy), mostly used to produce nanohybrid photocatalysts for photodegradation of organic pollutants, and the photocatalytic performances of PPy-based materials have been affected by the fabrication method and type of irradiated light [277]. Many examples of hybrid nanomaterials with photocatalytic properties have been recently reported, in which PPy has been combined with different semiconductor metal oxides, such as TiO 2 [290,291] , for pollutants degradation or hydrogen production, ZnO [292][293][294], and its derivatives doped with other metals, ZnWO 4 [295], Fe 2 O 3 [296], or Fe 3 O 4 [297][298][299].…”

Section: Conductive Polymers-based Hybrid Nanomaterialsmentioning

confidence: 99%

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

2020

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Solar radiation is becoming increasingly appreciated because of its influence on living matter and the feasibility of its application for a variety of purposes. It is an available and everlasting natural source of energy, rapidly gaining ground as a supplement and alternative to the nonrenewable energy feedstock. Actually, an increasing interest is involved in the development of efficient materials as the core of photocatalytic and photothermal processes, allowing solar energy harvesting and conversion for many technological applications, including hydrogen production, CO2 reduction, pollutants degradation, as well as organic syntheses. Particularly, photosensitive nanostructured hybrid materials synthesized coupling inorganic semiconductors with organic compounds, and polymers or carbon-based materials are attracting ever-growing research attention since their peculiar properties overcome several limitations of photocatalytic semiconductors through different approaches, including dye or charge transfer complex sensitization and heterostructures formation. The aim of this review was to describe the most promising recent advances in the field of hybrid nanostructured materials for sunlight capture and solar energy exploitation by photocatalytic processes. Beside diverse materials based on metal oxide semiconductors, emerging photoactive systems, such as metal-organic frameworks (MOFs) and hybrid perovskites, were discussed. Finally, future research opportunities and challenges associated with the design and development of highly efficient and cost-effective photosensitive nanomaterials for technological claims were outlined.

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Chemically prepared Polypyrrole/ZnWO4 nanocomposite electrodes for electrocatalytic water splitting

Cited by 46 publications

References 64 publications

Facile Polypyrrole/NASICON (PPy/Na₃Fe₂(SO₄)₂(PO₄)) Electrode Materials for the Hydrogen Evolution Reaction

Facile Polypyrrole/NASICON (PPy/Na₃Fe₂(SO₄)₂(PO₄)) Electrode Materials for the Hydrogen Evolution Reaction

Tuning Electrochemical Hydrogen-Evolution Activity of CoMoO4 through Zn Incorporation

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

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Chemically prepared Polypyrrole/ZnWO4 nanocomposite electrodes for electrocatalytic water splitting

Cited by 46 publications

References 64 publications

Facile Polypyrrole/NASICON (PPy/Na3Fe2(SO4)2(PO4)) Electrode Materials for the Hydrogen Evolution Reaction

Facile Polypyrrole/NASICON (PPy/Na3Fe2(SO4)2(PO4)) Electrode Materials for the Hydrogen Evolution Reaction

Tuning Electrochemical Hydrogen-Evolution Activity of CoMoO4 through Zn Incorporation

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

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Product

Resources

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Facile Polypyrrole/NASICON (PPy/Na₃Fe₂(SO₄)₂(PO₄)) Electrode Materials for the Hydrogen Evolution Reaction

Facile Polypyrrole/NASICON (PPy/Na₃Fe₂(SO₄)₂(PO₄)) Electrode Materials for the Hydrogen Evolution Reaction