Nanoporous silver for electrocatalysis application in alkaline fuel cells

Daria Barsuk; Anicet Zadick; Marian Chatenet; Konstantinos Georgarakis; Nikolaos T. Panagiotopoulos; Yannick Champion; Alberto Moreira Jorge

doi:10.1016/j.matdes.2016.09.037

Nanoporous silver for electrocatalysis application in alkaline fuel cells

Daria Barsuk, Anicet Zadick, Marian Chatenet, Konstantinos Georgarakis, Nikolaos T. Panagiotopoulos, Yannick Champion, Alberto Moreira Jorge

Research output: Contribution to journal › Article

18 Citations (Scopus)

Abstract

Self-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 0.1 M NaOH + 5 mM AB solution thermostated at 25 °C. Nanoporous materials, and in particular nanoporous silver, can therefore represent a relevant choice as anode in direct ammonia-borane fuel cell.

Original language	English
Pages (from-to)	528-536
Number of pages	9
Journal	Materials and Design
Volume	111
DOIs	https://doi.org/10.1016/j.matdes.2016.09.037
Publication status	Published - 2016 Dec 5

Keywords

Ammonia-borane
Dealloying
Electrooxidation
Fuel cell
Nanoporous
Silver alloys

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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Barsuk, D., Zadick, A., Chatenet, M., Georgarakis, K., Panagiotopoulos, N. T., Champion, Y., & Moreira Jorge, A. (2016). Nanoporous silver for electrocatalysis application in alkaline fuel cells. Materials and Design, 111, 528-536. https://doi.org/10.1016/j.matdes.2016.09.037

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abstract = "Self-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 0.1 M NaOH + 5 mM AB solution thermostated at 25 °C. Nanoporous materials, and in particular nanoporous silver, can therefore represent a relevant choice as anode in direct ammonia-borane fuel cell.",

keywords = "Ammonia-borane, Dealloying, Electrooxidation, Fuel cell, Nanoporous, Silver alloys",

author = "Daria Barsuk and Anicet Zadick and Marian Chatenet and Konstantinos Georgarakis and Panagiotopoulos, {Nikolaos T.} and Yannick Champion and {Moreira Jorge}, Alberto",

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AU - Barsuk, Daria

AU - Zadick, Anicet

AU - Chatenet, Marian

AU - Georgarakis, Konstantinos

AU - Panagiotopoulos, Nikolaos T.

AU - Champion, Yannick

AU - Moreira Jorge, Alberto

PY - 2016/12/5

Y1 - 2016/12/5

N2 - Self-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 0.1 M NaOH + 5 mM AB solution thermostated at 25 °C. Nanoporous materials, and in particular nanoporous silver, can therefore represent a relevant choice as anode in direct ammonia-borane fuel cell.

AB - Self-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 0.1 M NaOH + 5 mM AB solution thermostated at 25 °C. Nanoporous materials, and in particular nanoporous silver, can therefore represent a relevant choice as anode in direct ammonia-borane fuel cell.

KW - Ammonia-borane

KW - Dealloying

KW - Electrooxidation

KW - Fuel cell

KW - Nanoporous

KW - Silver alloys

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