Cost-Effective Nanoporous Gold Obtained by Dealloying Metastable Precursor, Au33Fe67, Reveals Excellent Methanol Electro-Oxidation Performance

In this study, we report nanoporous gold (NPG) as an economic, efficient, and stable alternative electrocatalyst for methanol electro-oxidation. The said sample was successfully prepared from Fe-rich metastable Au33Fe67 supersaturated solid solution acting the precursor, which formed into ribbons by phenomenon of rapid solidification using melt-spinning technique. as-quenched ribbon then chemically dealloyed in 1 M HCl at 70 °C different durations time. A homogeneous, free-standing, mechanically NPG obtained with tunable ligament shape size. morphology composition were characterized SEM EDS, while structure XRD. examined electro-oxidation profiting off its large surface area; cyclic voltammetry (CV) technique employed electrochemical studies. a basic KOH, displays low peak potential 0.47 V vs. Ag/AgCl high current density 0.43 mA/cm2. addition, it demonstrates outstanding stability poisoning tolerance. It is noteworthy that fabrication process start to end intentionally opted be sustainable, cost-effective, rapid, feasible. usage critical raw materials avoided. As whole, properties results put forth make inexpensive, excellent