Supportless Silver Nanowires as Oxygen Reduction Reaction Catalysts for Hydroxide‐Exchange Membrane Fuel Cells

Alia, Shaun M; Duong, Kathlynne; Liu, Toby; Jensen, Kurt; Yan, Yushan

doi:10.1002/cssc.201100684

Cited by 74 publications

(59 citation statements)

References 88 publications

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“…Alia et al. studied the ORR on AgNWs with various diameters (25, 40, 50 and 60 nm) . With decreasing the wire diameter the specific activity was observed to increase.…”

Section: Effect Of Ag Particle Size On the Orr Activitymentioning

confidence: 99%

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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“…Alia et al. studied the ORR on AgNWs with various diameters (25, 40, 50 and 60 nm) . With decreasing the wire diameter the specific activity was observed to increase.…”

Section: Effect Of Ag Particle Size On the Orr Activitymentioning

confidence: 99%

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

2018

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“…The ECSA of Pt/CNT [45], Pd/CNT [46], Au/CNT [47] and Ag/CNT [48] was calculated corresponding to coulombic charge of 0.420 mC cm -2 , 0.385 mC cm -2 , 0.245 mC cm -2 and 0.400 mC cm -2 , respectively. (Supplementary information, Figure S1) To evaluate the specific activity, the ECSA of Pd in the Pd-based bimetallic catalyst was calculated by intergrating the reduction peak of palldium oxidation.…”

Section: Introductionmentioning

confidence: 99%

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Benipal

Liang

et al. 2016

Applied Catalysis B: Environmental

162

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2 3 1.PdAg/CNT with 2.7 nm average particle size is prepared without using surfactants. 2.Ag outperforms Pt, Pd, and Au towards electrocatalytic aldehyde oxidation. 3.PdAg/CNT has high activity towards electrocatalytic alcohol oxidation. 4.PdAg/CNT was used as a highly active anode catalyst for direct alcohol fuel cells. 5.PdAg/CNT cleaves C-C bond of glycerol more effectively than Pd/CNT. 4 ABSTRACTSPdAg supported on carbon nanotubes (PdAg/CNT) with an average particle size of 2.7 nm is prepared by an aqueous phase reduction method for alcohol oxidation reaction in direct alcohol fuel cells. In a half-cell system with three electrodes, the peak mass activity of PdAg/CNT reaches 0.105 mA µg Pd -1 , 0.305 mA µg Pd -1 , 2.105 mA µg Pd -1 , and 8.53 mA µg Pd -1 for methanol oxidation reaction, ethanol oxidation reaction, ethylene glycol oxidation reaction, and glycerol oxidation reaction, respectively, in 1 M KOH 0.1 M alcohol electrolyte. These values are higher than the mass activity of Pd/CNT at the same applied potential. With PdAg/CNT (0.5 mg Pd per MEA -1 ) as an anode catalyst, a direct methanol fuel cell, a direct ethanol fuel cell, a direct ethylene glycol fuel cell and a direct glycerol fuel cell achieve peak power densities of 135.1 mW cm -2 , 202.3 mW cm -2 , 245.2 mW cm -2 , and 276.2 mW cm -2 , with corresponding peak mass activities of 270.2 mW mg Pd per MEA -1 , 404.6 mW mg Pd per MEA -1 , 490.4 mW mg Pd per MEA -1 , and 552.4 mW mg Pd per MEA -1 , respectively, at 80 °C and ambient pressure. Ag has shown excellent activity towards aldehyde (formaldehyde, acetaldehyde, and glyoxylate) oxidation, thus, the enhancement in alcohol oxidation on PdAg/CNT is proposed due to Ag's promotion of intermediate aldehyde oxidation. PdAg/CNT also improves the fuel efficiency of glycerol oxidation by contributing to the C-C bond cleavage of C 3 glycerol to C 2 oxalate.5

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“…Nanowires have not been virtually used as catalysts [23,24], as it is difficult to manufacture nanowires of small diameter in amounts sufficient for direct measurement of the catalytic action. From this standpoint, unique opportunities are provided by the recently developed method for the synthesis of metal nanowires by laser ablation in superfluid helium (LA) [25,26], which allows preparation from different metals in exceptionally pure conditions of considerable amounts of nanoweb consisting of single nanowires, interconnected via metallic bonding.…”

Section: Introductionmentioning

confidence: 99%

Application of Au–Cu nanowires fabricated by laser ablation in superfluid helium as catalysts for CO oxidation

et al. 2015

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The copper-doped gold nanowires (4 nm in diameter) were produced by the novel technique based of laser ablation of Au-Cu alloy inside superfluid helium. The principle of the method is using the quantized vortices as the 1D template for the condensation of the ablation products into thin threads. The nanowires were applied as the catalyst in СО oxidation with oxygen. The activity of Au-Cu nanowires deposited on glass filters was compared with that for monometallic and bimetallic Au and Cu particles (3-8 nm in diameter) deposited on alumina by traditional deposition-precipitation and impregnation techniques. The apparent activation energies of the reaction (Еа) were 95 and 98, 150, and 147 kJ/ mol for Au-Cu nanowires and Au-Cu, Au, and Cu particles, respectively. During running-in of the Au-Cu nanowirebased catalyst, Еа decreased to 20 kJ/mol and retained at this level in the subsequent cycles of lowering and raising the reactor temperature.

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Supportless Silver Nanowires as Oxygen Reduction Reaction Catalysts for Hydroxide‐Exchange Membrane Fuel Cells

Cited by 74 publications

References 88 publications

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

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

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Application of Au–Cu nanowires fabricated by laser ablation in superfluid helium as catalysts for CO oxidation

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