High-strength hierarchical-structured bulk nanoporous Cu prepared by dealloying and spark plasma sintering

Porosity evolution and oxide formation in bulk nanoporous copper dealloyed from a copper–manganese alloy studied by in situ resistometry

“…Independent of the dealloying routine (potential controlled or free corrosion), formation of Cu-oxide in acidic electrolytes concomitant to the etching process has been reported ( e.g. by Chen et al 28 and Wang et al 27 ).…”

“…as anode materials for lithium-ion batteries, [10][11][12] as catalysts [13][14][15] and for sensors. 16 In the literature, synthesis of npCu from AlCu, [16][17][18][19][20] SnCu, 11 TiCu, 21 CeCu, 22 NiCu, 17 ZnCu 17,23,24 and CuMn [25][26][27] has been reported, whereby the resulting nanoporous structures differ greatly depending on experimental parameters and alloy composition. Among them, nanoporous copper from copper-manganese gained a lot of interest as it exhibits one of the largest differences in electrochemical potential (difference of 1.477 V between Mn/Mn 2+ and Cu/Cu 2+ ) 28 from the alloys mentioned above.…”

Synthesis, characterization, and dealloying of Al-Cu alloys prepared using spark plasma sintering

“…Among the many possible nanoporous metal systems, Cu has been widely studied due in part to the relatively low cost of precursor alloys, and to its high catalytic potential [9,10]. Precursor systems for nanoporous copper that have been studied include Al-Cu [11,12], Mn-Cu [13,14], and Zn-Cu [15,16]. Typically, these dealloying precursors are prepared by a process of melting and homogenization annealing [13,16,17].…”