Electrocatalytic oxygen reduction on silver nanoparticle/multi-walled carbon nanotube modified glassy carbon electrodes in alkaline solution

Tammeveski, Lauri; Erikson, Heiki; Sarapuu, Ave; Kozlova, Jekaterina; Ritslaid, Peeter; Sammelselg, Väinö; Tammeveski, Kaido

doi:10.1016/j.elecom.2012.04.003

Cited by 110 publications

(75 citation statements)

References 19 publications

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“…where j k and j l are the kinetic and diffusion-limited current densities at a constant potential, respectively, F is the Faraday constant (96,485 C mol −1 ), D O2 is the diffusion coefficient of oxygen (1.9 × 10 −5 cm 2 s −1 ), v is the kinematic viscosity of the solution (0.01 cm 2 s −1 ), C O2 is the bulk concentration of oxygen (1.2 × 10 −6 mol cm −3 ), and ω is the electrode rotating speed expressed in rps [37]. The K-L plots (j −1 vs ω -1/ 2 ) were created at various potentials, the slope is 1/B, and intercept is 1/j k .…”

Section: Methodsmentioning

confidence: 99%

Facile synthesis of N-doped carbon nanosheet-encased cobalt nanoparticles as efficient oxygen reduction catalysts in alkaline and acidic media

Zhao

Pan

et al. 2016

Ionics

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In this work, a low-cost, high-performance, and environmentally friendly non-precious-metal catalyst was fabricated via a simple pyrolysis of the corn starch, dicyandiamide, and cobalt acetate for the oxygen reduction reaction (ORR). Scanning electron microscope (SEM) and transmission electron microscopy (TEM) images show that the catalyst has porous and graphene-like carbon nanosheetencased metal nanoparticles structure. Electrochemical measurements show that, compared to the commercial Pt/C catalysts, the catalyst has a low overpotential, larger current density, and better methanol tolerance ability for ORR in both alkaline and acidic media, which may be attributed to the incorporation of Co-Nx moieties and Co nanoparticles. The transferred number of electrons during the ORR with the catalyst was calculated to be ∼3.9 in alkaline media (∼3.7 in acidic media), indicating that the product would be a promising non-noble cathode catalyst in alkaline and acidic fuel cells or Li/Zn air batteries.

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Section: Methodsmentioning

confidence: 99%

Facile synthesis of N-doped carbon nanosheet-encased cobalt nanoparticles as efficient oxygen reduction catalysts in alkaline and acidic media

Zhao

Pan

et al. 2016

Ionics

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“…Being less expensive than Pt silver has shown relatively high ORR activity and stability in alkaline electrolyte, and now, it is considered as feasible alternative to replace platinum in cathode catalysts for fuel cells [34][35][36][37]. According to earlier studies, Ag has been proven relatively stable in alkaline electrolytes at a wide range of temperatures [38][39][40][41].…”

Section: Introductionmentioning

confidence: 98%

Enhanced Oxygen Reduction Reaction Activity with Electrodeposited Ag on Manganese Oxide–Graphene Supported Electrocatalyst

et al. 2015

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M a n g a n e s e o x i d e -m o d i f i e d g r a p h e n e nanosheet-supported silver nanocatalyst (Ag-MnO x /G) was prepared via two-step chemical and electrochemical deposition. Surface characterization of the prepared AgMnO x /G catalyst was performed by X-ray photoelectron spectroscopy, scanning electron microscopy, as well as Xray fluorescence techniques, and the electrocatalytic activity toward the oxygen reduction reaction (ORR) in alkaline media was studied using cyclic voltammetry and the rotating disk electrode (RDE) method. The onset potential of the ORR of the prepared catalyst material shifted positive about 40 mV, and the half-wave potential 20 mV compared to those of the bulk Ag electrode. After 1000 potential cycles between 0.05 and 1.1 V for accelerated aging tests, high stability of the Ag-MnO x /G catalyst in the ORR was observed with the half-wave potential of the ORR shifting negatively only about 0.04 V. RDE studies displayed unconditional improvement of electrochemical activity and long-term durability for the Ag-MnO x /G composite material.

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“…1 Silver nanoparticles have been applied in many fields including photonics, micro-electronics, photocatalysis, lithography, and surface-enhanced Raman spectroscopy. 2,3 Several types of chemical and physical technologies, such as chemical reduction, [4][5][6] electrochemical reduction, [7][8][9] photochemical reduction, [10][11][12] and heat evaporation 13,14 have been developed for the synthesis of silver nanoparticles. In recent years, bio-or green-synthesis of silver nanoparticles has become an emerging science.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles

Wang

Yang

et al. 2015

IJN

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Silver nanoparticles have been used in various fields, and several synthesis processes have been developed. The stability and dispersion of the synthesized nanoparticles is vital. The present article describes a novel approach for one-step synthesis of silver nanoparticles–embedded chitosan particles. The proposed approach was applied to simultaneously obtain and stabilize silver nanoparticles in a chitosan polymer matrix in-situ. The diameter of the synthesized chitosan composite particles ranged from 1.7 mm to 2.5 mm, and the embedded silver nanoparticles were measured to be 15±3.3 nm. Further, the analyses of ultraviolet-visible spectroscopy, energy dispersive spectroscopy, and X-ray diffraction were employed to characterize the prepared composites. The results show that the silver nanoparticles were distributed over the surface and interior of the chitosan spheres. The fabricated spheres had macroporous property, and could be used for many applications such as fungicidal agents in the future.

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Electrocatalytic oxygen reduction on silver nanoparticle/multi-walled carbon nanotube modified glassy carbon electrodes in alkaline solution

Cited by 110 publications

References 19 publications

Facile synthesis of N-doped carbon nanosheet-encased cobalt nanoparticles as efficient oxygen reduction catalysts in alkaline and acidic media

Facile synthesis of N-doped carbon nanosheet-encased cobalt nanoparticles as efficient oxygen reduction catalysts in alkaline and acidic media

Enhanced Oxygen Reduction Reaction Activity with Electrodeposited Ag on Manganese Oxide–Graphene Supported Electrocatalyst

Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles

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Electrocatalytic oxygen reduction on silver nanoparticle/multi-walled carbon nanotube modified glassy carbon electrodes in alkaline solution

Cited by 110 publications

References 19 publications

Facile synthesis of N-doped carbon nanosheet-encased cobalt nanoparticles as efficient oxygen reduction catalysts in alkaline and acidic media

Facile synthesis of N-doped carbon nanosheet-encased cobalt nanoparticles as efficient oxygen reduction catalysts in alkaline and acidic media

Enhanced Oxygen Reduction Reaction Activity with Electrodeposited Ag on Manganese Oxide–Graphene Supported Electrocatalyst

Synthesis and anti-fungal effect of silver nanoparticles&ndash;chitosan composite particles

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Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles