Fine-tuning the feature size of nanoporous silver

Detsi, Eric; Vuković, Ž.; Punzhin, Sergey; Bronsveld, P.M.; Onck, Patrick; Hosson, J.T.M. de

doi:10.1039/c2ce25313e

Cited by 55 publications

(62 citation statements)

References 31 publications

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“…After the verification of composition by energy-dispersive X-ray spectroscopy, the resulting alloy ingot was cut into thin plates with dimensions of 15 Â 5 Â 0.20 mm 3 using a precision wafering machine. The obtained thin plates were sandwiched between two glass slides and annealed at 546°C for 12 h to suppress the Ag 2 Al intermetallic compound phase 38 . A rapid cooling process was followed by quenching the thin plates from 546°C to about 3°C using a water/ice mixture bath.…”

Section: Methodsmentioning

confidence: 99%

A selective and efficient electrocatalyst for carbon dioxide reduction

et al. 2014

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Converting carbon dioxide to useful chemicals in a selective and efficient manner remains a major challenge in renewable and sustainable energy research. Silver is an interesting electrocatalyst owing to its capability of converting carbon dioxide to carbon monoxide selectively at room temperature; however, the traditional polycrystalline silver electrocatalyst requires a large overpotential. Here we report a nanoporous silver electrocatalyst that is able to electrochemically reduce carbon dioxide to carbon monoxide with approximately 92% selectivity at a rate (that is, current) over 3,000 times higher than its polycrystalline counterpart under moderate overpotentials of o0.50 V. The high activity is a result of a large electrochemical surface area (approximately 150 times larger) and intrinsically high activity (approximately 20 times higher) compared with polycrystalline silver. The intrinsically higher activity may be due to the greater stabilization of CO 2 À intermediates on the highly curved surface, resulting in smaller overpotentials needed to overcome the thermodynamic barrier.

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Section: Methodsmentioning

confidence: 99%

A selective and efficient electrocatalyst for carbon dioxide reduction

et al. 2014

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“…Compared with nanoporous Au, Pt and Pd, nanoporous silver (NPS) is economically more attractive, and also exhibits unique physical and chemical properties [6][7][8][9][10][11]. However, with a few exceptions, most of the reported characteristic sizes of the pores and ligaments in Ag alloys are mainly in the submicrometer range (100-500 nm).…”

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confidence: 98%

“…Nanoporous noble metals have received intensive interest recently as free-standing nanomaterials due to their potential for various chemical applications [1][2][3][4][5]. Compared with nanoporous Au, Pt and Pd, nanoporous silver (NPS) is economically more attractive, and also exhibits unique physical and chemical properties [6][7][8][9][10][11]. However, with a few exceptions, most of the reported characteristic sizes of the pores and ligaments in Ag alloys are mainly in the submicrometer range (100-500 nm).…”

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confidence: 98%

Fabrication of nanoporous silver with open pores

et al. 2015

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“…Among others, nanoporous silver (NPS) was obtained in the group of De Hosson by dealloying Al from the amorphous Ag\ \Al precursor alloy [57]. Another interesting "clean" method of its fabrication was recently suggested by the group of T. Zhang when amorphous Ag\ \Ca foils were simply immersed in water to remove calcium atoms [55].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous silver for electrocatalysis application in alkaline fuel cells

et al. 2016

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International audienceSelf-supporting porous silver foils with an average pore size <100 nm were produced from a crystalline silver-based ternary alloy as a precursor by removing second phases present in the silver matrix. The final Ag-based porous foil shows good mechanical properties when comparing to its previous amorphous analogues. Its activity for direct electrochemical oxidation of ammonia-borane (AB), a fuel of interest for direct liquid fuel cells, has been investigated in alkaline media. The material exhibits promising electrochemical properties in long-term operation; indeed, material composition and nanostructure remain similar after 15,000 cyclic-voltammetries between -0.3 and 0.5 V vs. RHE in a 0.1M NaOH+ 5mMAB solution thermostated at 25 degrees C. Nanoporous materials, and in particular nanoporous silver, can therefore represent a relevant choice as anode in direct ammonia-borane fuel cell. (C) 2016 Elsevier Ltd. All rights reserved

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Fine-tuning the feature size of nanoporous silver

Cited by 55 publications

References 31 publications

A selective and efficient electrocatalyst for carbon dioxide reduction

A selective and efficient electrocatalyst for carbon dioxide reduction

Fabrication of nanoporous silver with open pores

Nanoporous silver for electrocatalysis application in alkaline fuel cells

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