TY - JOUR
T1 - Nanoporous silver for electrocatalysis application in alkaline fuel cells
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
UR - http://www.scopus.com/inward/record.url?scp=84988027619&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84988027619&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2016.09.037
DO - 10.1016/j.matdes.2016.09.037
M3 - Article
AN - SCOPUS:84988027619
VL - 111
SP - 528
EP - 536
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
ER -