Novel Nanoporous Au−Pd Alloy with High Catalytic Activity and Excellent Electrochemical Stability

Abstract

A novel nanoporous gold-palladium alloy has been successfully fabricated by electrochemically dealloying a multicomponent metallic glass. In comparison with conventional nanoporous gold prepared by dealloying Au-Ag alloys, the nanoporous gold-palladium alloy shows much higher catalytic activity for electrooxidation of methanol as a free-standing electrode. Moreover, a small amount of palladium in the nanoporous alloy is found to dramatically improve the electrochemical stability of nanoporous gold.

ALD Functionalized Nanoporous Gold: Thermal Stability, Mechanical Properties, and Catalytic Activity

“…Nanoporous metals such as nanoporous gold (np-Au) prepared by dealloying have recently attracted considerable interest fueled by their potential use in catalysis [1][2][3][4][5][6] , sensor 3,[7][8][9][10][11][12] and actuator applications. [13][14][15] The remarkable properties of these materials are a consequence of their characteristic bicontinuous nanoporous structure of interconnected nm-sized pores and ligaments that is formed by a self-organization process.…”

Novel Green Synthesis and Characterization of Nanopolymer Porous Gold Oxide Nanoparticles

“…There are several methods for preparing nanoporous materials, such as electrochemical erosion [11] electrochemical oxidation/chemical reduction processes [12], chemical dealloying of alloys [5,7,13,14], electrochemical alloying/ dealloying [4,15,16] and (the complicated) template synthesis [17][18][19].…”

Effects of pulse voltage on the formation of nanoporous Ti oxides by dealloying amorphous TiCu alloy

“…Dealloying, as also called the selective corrosion, is a process that the active elements in the original alloy system are dissolved in the electrolyte solution, but the inert elements reserve in the [17], Cu-Au [18], Si-Pt [19], Cu-Pt [20], Mn-Cu [21], Au-Pd [22], etc. In comparison with crystalline alloys, amorphous alloys are considered as good starting alloy for dealloying due to their monolithic phase with a homogeneous composition and structure down to subnanoscale [23,24].…”