LAUSR

In this study, monolithic micro/nanoporous copper is prepared by sintering and dealloying, that is, the micro/nanoporous copper is obtained by chemical dealloying of a sintered microporous Cu­Mn alloy. The porosity and Brunauer­Emmett­Teller (BET) surface area are 68% and 6.77m2·g11, respectively. The micropore and nanopore sizes are 2.44 « 0.48μm and 69 « 16 nm, respectively. The mechanical property is investigated by nanoindentation. The hardness and elastic modulus are 282 « 65MPa and 8.25 « 1.63GPa, respectively. Indentation creep occurs with a creep depth of 44 « 7 nm. The electrocatalytic property towards the oxidation of methanol and glucose are investigated using cyclic voltammetry and chronoamperometry. The monolithic micro/nanoporous copper exhibits high electrocatalytic activity and stability. The oxidation peak current density in methanol or glucose alkaline solution is 17 or 51 times that of smooth copper. [doi:10.2320/matertrans.MT-M2020012]