Polyaniline coated copper for hydrogen storage and evolution in alkaline medium

Padmapriya, S.; Harinipriya, S.; Sudha, V.; Kumar, Deepak; Pal, Samanwita; Chaubey, Bhawna

doi:10.1016/j.ijhydene.2017.06.204

Cited by 20 publications

(21 citation statements)

References 38 publications

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“…[26][27][28] Doped PANI (PANI-HCl) was chemically synthesized using aniline with ammonium persulfate (NH 4 ) 2 S 2 O 8 as oxidant in a 4:1 (monomer/oxidant) molar ratio.…”

Section: Preparation Of Es Form Of Panimentioning

confidence: 99%

“…28 2.5 | Electrochemical measurements 2.5.1 | Cyclic voltammetry Cyclic voltammetry (CV) behavior of ES-coated copper and copper was analyzed with a 3-electrode assembly using a BioLogic workstation. A copper sheet of dimension 2.5 × 3 cm was cleaned with ethanol and dried for a minute or 2.…”

Section: Electrode Preparationmentioning

confidence: 99%

“…29 It was found that in the present scenario, the sharpness of the 322 crystal plane was maximum, whereas in the literature, the maximum intensity peak was the 121 crystal plane. 28 29,30 Bhadra and Khastgir 29 synthesized ES of PANI in toluene medium with a very low concentration of HCl, 29 whereas Asha and Kishore 30 synthesized an emeraldine base of PANI in aqueous medium and doped it with 1M HCl in acetone medium.…”

Section: Structural Analysismentioning

confidence: 99%

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Storage and evolution of hydrogen in acidic medium by polyaniline

et al. 2017

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Summary Emeraldine salt of polyaniline‐coated copper substrate was used as a cathode to study hydrogen evolution reaction in 1M H2SO4. Hydrogen evolution reaction in acidic medium followed Grotthus mechanism, where proton hops randomly on the surface of polyaniline. With Randles‐Sevcik equation, the average value of diffusion coefficient for H+ on polyaniline was calculated to be 2.66 times higher than that in the literature data. This higher value explicitly supported the rapid diffusion of H+ on polyaniline surface from the bulk electrolyte solution. With the help of a phenomenological thermodynamic approach demonstrated elsewhere, the solvent‐modified work function of polyaniline‐coated copper in acidic medium was calculated. The plot of exchange current density versus solvent‐modified work function of different metals and polyaniline‐coated copper indicated that at lower work function polyaniline‐coated copper showed higher exchange current density and the rate of hydrogen evolution was much higher on polyaniline‐coated copper than on copper. This was further confirmed by gas chromatography, and 13C and 1H nuclear magnetic resonance studies supported the mechanism proposed. From linear sweep voltammetry analysis, it was observed that the total capacity of hydrogen stored on polyaniline‐coated copper was approximately 1.85 times higher than that on copper.

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“…[26][27][28] Doped PANI (PANI-HCl) was chemically synthesized using aniline with ammonium persulfate (NH 4 ) 2 S 2 O 8 as oxidant in a 4:1 (monomer/oxidant) molar ratio.…”

Section: Preparation Of Es Form Of Panimentioning

confidence: 99%

Section: Electrode Preparationmentioning

confidence: 99%

Section: Structural Analysismentioning

confidence: 99%

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Storage and evolution of hydrogen in acidic medium by polyaniline

et al. 2017

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“…However, in EPCI 1, the NH stretching band shifts to 3086 cm −1 , which indicates the interaction of the epoxy resin with the nanohybrid. Also, the appearance of –C=O stretch at 1723 cm −1 in PC shifts to 1736 cm −1 with higher intensity in EPCI designates a strong interaction with PC …”

Section: Resultsmentioning

confidence: 96%

“…The peaks for protons of hydroxyl and aldehydic functionalities of CD were found at 5.75 and 6.45 ppm, respectively . The peak for protons attached with the nitrogen atom of the aniline moiety of polymeric chain appears at 5.62 ppm …”

Section: Resultsmentioning

confidence: 97%

Bio‐based epoxy/polyaniline nanofiber‐carbon dot nanocomposites as advanced anticorrosive materials

Saikia

Sarmah

Kumar

et al. 2019

J of Applied Polymer Sci

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Application of anticorrosive coating on metal surface enhances the durability of the metal. Anticorrosion can be achieved by the incorporation of conducting nanomaterials like polyaniline or its nanohybrid to a coating material. Thus, bio‐based epoxy nanocomposites were fabricated by the in situ method using polyaniline nanofiber‐carbon dot nanohybrid (0.50 and 1 wt % with respect to epoxy), as the anticorrosive material. The epoxy resin was obtained by polycondensation of bisphenol‐A, sorbitol, and monoglyceride of castor oil (mole ratio of 16:3:1), as hydroxyl compounds with epichlorohydrin (1:3 equivalent, hydroxyl:epichlorohydrin). The morphological analyses of the nanocomposites revealed the uniform dispersion and good compatibility of the nanohybrid in the epoxy matrix. The thermosets demonstrated good tensile strength (30 MPa), elongation at break (45%), scratch resistance (>10 kg) and impact resistance (14.75 kJ/m), good thermal stability (above 250°C), and chemical resistance. The anticorrosion study of the nanocomposites showed excellent corrosion protection efficiency (corrosion rate: 5.68 × 10−3 mils per year) in 3.5 wt % NaCl compared to the pristine epoxy system. Therefore, this bio‐based thermosetting epoxy nanocomposite was demonstrated as efficient anticorrosive material. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47744.

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