Stabilizer-free silver nanoparticles as efficient catalysts for electrochemical reduction of oxygen

Treshchalov, Alexey; Erikson, Heiki; Puust, Laurits; Tsarenko, S. A.; Saar, Rando; Ванецев, А. С.; Tammeveski, Kaido; Силдос, И.

doi:10.1016/j.jcis.2016.12.053

Cited by 59 publications

(40 citation statements)

References 49 publications

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“…[33] Preparation of AgNPs by plasma jet treatment offers the advantage of not using any organic stabilisers that may affect the ORR activity. [34] These AgNPs were about 16-17 nm in diameter and showed good ORR electrocatalytic activity and stability. The agglomeration of the AgNPs in the suspension was prevented by weakly bound OH À ions.…”

Section: Orr On Nanostructured Ag Catalystsmentioning

confidence: 99%

“…In their later work Ag nanoparticles were protected by meso‐2,3‐dimercapto‐succinic acid and the electroreduction of oxygen occured via 2e − pathway . Preparation of AgNPs by plasma jet treatment offers the advantage of not using any organic stabilisers that may affect the ORR activity . These AgNPs were about 16–17 nm in diameter and showed good ORR electrocatalytic activity and stability.…”

Section: Orr On Nanostructured Ag Catalystsmentioning

confidence: 99%

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Oxygen Reduction Reaction on Silver Catalysts in Alkaline Media: a Minireview

2018

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The development of efficient platinum‐free catalysts for electrocatalytic oxygen reduction reaction (ORR) is one of the main challenges in the fuel cell research. Silver‐based materials are highly active towards ORR in alkaline conditions and recent achievements in improving the performance of anion exchange membrane fuel cells (AEMFCs) have provoked many scientists to study these catalysts. This minireview is focused on the ORR performance of monometallic Ag catalysts and Ag‐based composites, the electrochemical oxygen reduction behaviour of Ag‐containing alloys is outside the scope of this review. The effect of the morphology of Ag nanostructures on catalysts’ ORR activity and pathway is discussed and the role of the support material is described. The performance of AEMFCs using Ag‐based cathode catalysts is also reviewed.

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Section: Orr On Nanostructured Ag Catalystsmentioning

confidence: 99%

Section: Orr On Nanostructured Ag Catalystsmentioning

confidence: 99%

Oxygen Reduction Reaction on Silver Catalysts in Alkaline Media: a Minireview

2018

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“…[63,64] The pH values of solutions were measured by a portable pH meter (pH-98103R, Analytical Instruments). The voltage and current waveforms of the discharge were similar to that demonstrated in our previous works.…”

Section: Instrumentation and Measurementsmentioning

confidence: 99%

“…The voltage and current waveforms of the discharge were similar to that demonstrated in our previous works. [63,64] The pH values of solutions were measured by a portable pH meter (pH-98103R, Analytical Instruments).…”

Section: Instrumentation and Measurementsmentioning

confidence: 99%

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

et al. 2018

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Platinum nanoparticles were deposited on reduced graphene oxide (rGO) and nitrogen-doped rGO (rGOÀN) by He/H 2 plasma jet treatment of H 2 PtCl 6 aqueous solution for electroreduction of oxygen. Physical characterization of the prepared catalysts was performed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Electrochemical characterization was carried out by cyclic voltammetry and CO-stripping techniques. The oxygen reduction reaction (ORR) activity of the prepared Pt/rGO and Pt/ rGOÀN catalyst materials was investigated using the rotating disk electrode method in 0.1 M KOH and 0.05 M H 2 SO 4 . In both acidic and alkaline electrolytes, the catalyst materials prepared by the plasma jet method demonstrated superior electrocatalytic properties compared to that of commercial 20 wt% Pt/ C catalyst. Specific activity values for the ORR in acid electrolyte were 2-fold and in alkaline media more than 3-fold higher than that obtained for commercial Pt/C catalyst.

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“…Silver nanoparticles continue to attract scientific interest due to their unique application potential in various technology areas such as photography [ 1 ], electronics [ 2 ], chemical catalysis, catalytic degradation [ 3 , 4 , 5 , 6 ], and others. Among the wide range of applications of silver nanoparticles, their antimicrobial and bactericidal effect are of particular importance [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Stabilised by Cationic Gemini Surfactants with Variable Spacer Length

et al. 2017

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The present study is focused on the synthesis and investigation of the physicochemical and biological properties of silver nanoparticles stabilized with a series of cationic gemini surfactants having a polymethylene spacer of variable length. UV-VIS spectroscopy, dynamic light scattering, scanning electron microscopy and zeta potential measurements were applied to provide physicochemical characterization of the silver nanoparticles. The mean size values of the nanoparticles were found to be in the 50 to 115 nm range. From the nanoparticle size distributions and scanning electron microscopy images it results that a population of small nanoparticles with the size of several nanometers was confirmed if the nanoparticles were stabilized with gemini molecules with either a short methylene spacer (two or four −CH2− groups) or a long spacer (12 −CH2− groups). The average zeta potential value for silver nanoparticles stabilized with gemini molecules is roughly independent of gemini surfactant spacer length and is approx. +58 mV. An interaction model between silver nanoparticles and gemini molecules which reflects the gained experimental data, is suggested. Microbicidal activity determinations revealed that the silver nanoparticles stabilized with gemini surfactants are more efficient against Gram-negative bacteria and yeasts, which has a direct relation to the interaction mechanism of nanoparticles with the bacterial cell membrane and its structural composition.

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Stabilizer-free silver nanoparticles as efficient catalysts for electrochemical reduction of oxygen

Cited by 59 publications

References 49 publications

Oxygen Reduction Reaction on Silver Catalysts in Alkaline Media: a Minireview

Oxygen Reduction Reaction on Silver Catalysts in Alkaline Media: a Minireview

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Silver Nanoparticles Stabilised by Cationic Gemini Surfactants with Variable Spacer Length

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