Effect of composition and microstructure on electrical properties and CO2 stability of donor-doped, proton conducting BaCe1−(x+y)ZrxNbyO3

In this work, manganese dioxide/carbon nanotube (MnO2/CNT) have been synthesized by sonochemical‐coprecipitation method and demonstrated that it could be an effective electrocatalyst for oxygen reduction reaction (ORR). Moreover, the effect of CNT inclusion with MnO2 was also investigated for ORR. The physical and electrochemical properties of the MnO2/CNT were examined by powder X‐ray diffraction (XRD), Fourier Transform Infrared (FT‐IR) spectroscopy, Brunauer‐Emmett‐Teller (BET), Transmission Electron Microscopy (TEM), Field Emission Scanning Electron Microscopy/Energy Dispersive X‐ray (FESEM/EDX), Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), Mott‐Schottky and Rotating Disk Electrode (RDE) analysis. CV showed higher currents for the ORR in MnO2/CNT than CNT; however, ORR current dropped when the MnO2 loading was increased from 20–40 %. The EIS analysis showed that charge‐transfer resistance for MnO2/CNT was significantly lower compared to the MnO2 indicating that MnO2 has good contact with CNT and the composite possess high electrical conductivity. Mott‐Schottky results demonstrated that incorporation of CNT into MnO2 resulted in producing larger electron density in n‐type MnO2/CNT compared to MnO2 which is liable for efficient electron donation from the Mn3+ to adsorbed oxygen in the rate determining step. RDE results showed that MnO2/CNT follows 4e− transfer pathway, indicating its ability to act as an effective ORR electrocatalyst.

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“…where C, R, n and Q are the capacitance, parallel resistance, empirical constant and pseudo‐capacitance, respectively …”

Section: Resultssupporting

confidence: 85%

Carbon Nanotube-Modified MnO₂ : An Efficient Electrocatalyst for Oxygen Reduction Reaction

et al. 2017

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“…The Zr3d spin-orbit splitting (3d 3/2 and 3d 5/2 ) area ratio is 2:3 with a peak separation of 2.4 eV [68]. Thus, XP spectra of Zr3d were satisfactorily fitted with one doublet for Pt/Ce-Zr catalyst (Fig.…”

Section: Catalystmentioning

confidence: 98%

Sour water–gas shift reaction over Pt/CeZrO2 catalysts

Silva

Terra

Coutinho

et al. 2016

Journal of Catalysis

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“…The corresponding parameters are shown in the inset of Fig. c, where R s is the series resistance, R ct the charge transfer resistance, CPE is a constant phase element , which can be used to calculate the chemical capacitance ( C μ ) of the electrode, and Z N is the Nernst diffusion resistance, related to diffusion of the electrolyte . The values shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Photo‐enhanced catalytic activity of spray‐coated Cu₂SnSe₃ nanoparticle counter electrode for dye‐sensitised solar cells

Soosaimanickam

Anderson

et al. 2016

Physica Rapid Research Ltrs

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Cu2SnSe3 nanoparticles are synthesised using oleylamine as both a solvent and capping agent and spray coated to form dye‐sensitised solar cell (DSSC) counter electrodes (CEs) using earth‐abundant elements. The film requires annealing at only 400 °C in nitrogen, which is a lower temperature than previous reports of both Cu2SnSe3and Cu2ZnSnSe4 films, also avoiding the use of Se gas. The composition and phase of the material is confirmed to be kesterite Cu2SnSe3. DSSCs using Cu2SnSe3 CEs give a power conversion efficiency of 4.87%, compared to 5.35% when using Pt. Electrochemical impedance spectroscopy indicates that the performance of the Cu2SnSe3 CE is enhanced under illumination, leading to a drop in the charge transfer resistance. This illumination‐induced enhancement of the catalytic activity provides a novel mechanism for the enhancement of CE performance in DSSCs. Photo‐excitation of the nanostructured Cu2SnSe3 counter electrode provides a higher overpotential for electrolyte reduction, giving improved catalytic performance.

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Effect of composition and microstructure on electrical properties and CO2 stability of donor-doped, proton conducting BaCe1−(x+y)ZrxNbyO3

Cited by 65 publications

References 34 publications

Carbon Nanotube-Modified MnO₂ : An Efficient Electrocatalyst for Oxygen Reduction Reaction

Carbon Nanotube-Modified MnO₂ : An Efficient Electrocatalyst for Oxygen Reduction Reaction

Sour water–gas shift reaction over Pt/CeZrO2 catalysts

Photo‐enhanced catalytic activity of spray‐coated Cu₂SnSe₃ nanoparticle counter electrode for dye‐sensitised solar cells

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Effect of composition and microstructure on electrical properties and CO2 stability of donor-doped, proton conducting BaCe1−(x+y)ZrxNbyO3

Cited by 65 publications

References 34 publications

Carbon Nanotube-Modified MnO2 : An Efficient Electrocatalyst for Oxygen Reduction Reaction

Carbon Nanotube-Modified MnO2 : An Efficient Electrocatalyst for Oxygen Reduction Reaction

Sour water–gas shift reaction over Pt/CeZrO2 catalysts

Photo‐enhanced catalytic activity of spray‐coated Cu2SnSe3 nanoparticle counter electrode for dye‐sensitised solar cells

Contact Info

Product

Resources

About

Carbon Nanotube-Modified MnO₂ : An Efficient Electrocatalyst for Oxygen Reduction Reaction

Carbon Nanotube-Modified MnO₂ : An Efficient Electrocatalyst for Oxygen Reduction Reaction

Photo‐enhanced catalytic activity of spray‐coated Cu₂SnSe₃ nanoparticle counter electrode for dye‐sensitised solar cells